# Oath Protein Powder: Clear Whey That Drinks Like Juice

> Oath Nutrition reviewed on the label: the 20 g Clear Whey Isolate, the 25 g Whey Protein, sweeteners, what the testing claims cover and the real cost per 25 g.

- **URL**: https://www.best-proteinpowder.com/oath-protein-powder-review/
- **Updated**: 2026-11-02
- **Author**: [Best Protein Powder Editorial Team](https://www.best-proteinpowder.com/authors/editorial-team/)
- **Publisher**: [Best Protein Powder](https://www.best-proteinpowder.com/)

---

Oath Nutrition comes from the company behind BlenderBottle, and its clear whey has become one of the most visible on Target and Amazon shelves. Here is what is actually in it, which Oath product to buy, who should skip it, and what it costs per 25 g of protein.

**How we rank:** We judge every powder on the label, not the marketing: protein per scoop, cost per 25 g of protein, the full ingredient list and third-party testing. No paid placements, and commission never sets a ranking. [Read our methodology](https://www.best-proteinpowder.com/how-we-test/)

Oath Clear Whey Isolate is a light, juice-style whey isolate with 20 g of protein in about 100 calories, sweetened with sucralose and priced well when it is on sale. It is a good clear whey, not a great value whey, and it carries no third-party certification we could confirm. Buy it for a refreshing shake, not for the best protein per dollar.

## Our Top Picks

| Award | Product | Why |
| --- | --- | --- |
| Best Overall Oath | [Oath Nutrition Clear Whey Isolate Protein Powder](https://www.best-proteinpowder.com/oath-protein-powder-review/#oath-clear-whey-isolate) | A good clear whey to buy on sale if you want a light, refreshing shake. |
| Most Protein per Scoop | [Oath Nutrition Whey Protein](https://www.best-proteinpowder.com/oath-protein-powder-review/#oath-whey-protein) | The better-value Oath if you want a regular whey and can find your flavor in stock. |
| Best for Trying Flavors | [Oath Nutrition Clear Protein Single-Serve Variety Pack](https://www.best-proteinpowder.com/oath-protein-powder-review/#oath-clear-protein-variety-pack) | Buy this first if you have never tried clear whey; switch to a tub once you know your flavor. |
| Alternative: Clear Whey From an Isolate Specialist | [Isopure Infusions](https://www.best-proteinpowder.com/oath-protein-powder-review/#isopure-infusions) | A conservative clear whey pick from a long-established isolate brand. |
| Alternative: Better Value Regular Whey | [Optimum Nutrition Gold Standard 100% Whey](https://www.best-proteinpowder.com/oath-protein-powder-review/#optimum-nutrition-gold-standard-100-whey) | The better buy if value and verification matter more than a juice-like texture. |

## 1. The Short Verdict

Oath is a real, established protein brand, and its flagship Clear Whey Isolate is a competent example of the clear whey category. Retailer labels show about 20 g of protein from whey protein isolate in roughly 100 to 110 calories, with about 2 g of carbohydrate and around 1 g of sugar or less, depending on flavor. It mixes into a thin, fruit-flavored drink rather than a milkshake, which is the whole point of clear whey.

Where Oath falls short is the same place most clear wheys fall short: 20 g per scoop and a price that only looks good on sale. At a typical shelf price of around 40 dollars for 18 servings, a 25 g dose of protein costs roughly 2.80 dollars. Oath runs frequent promotions, and on deal it can drop to around 1.40 to 2 dollars per 25 g, which is competitive for a clear isolate. At full price, a standard whey gives you more protein for less money.

The other thing to know before buying is verification. Oath says, in retailer Q&A, that its clear whey is made in the United States in cGMP-certified facilities and undergoes third-party testing. We could not find an independent certification such as NSF Certified for Sport or Informed Choice attached to Oath products. That does not mean the product is bad. It does mean tested athletes should look elsewhere.

> **THE VERDICT**
>
> **A good clear whey to buy on sale, not a value whey or a tested-sport whey.**
>
> Buy Oath Clear Whey Isolate if you want a light, refreshing alternative to milkshake-style protein and can catch it on promotion. Buy the regular Oath Whey Protein if you want 25 g per scoop. Skip both if you need a certified product or the lowest cost per gram.

This review is built on Oath's own product pages, retailer supplement panels and published trade coverage. We have not tasted or lab-tested Oath products ourselves; where we mention taste, foam or mixing, it is buyer feedback reported as such. For the full field of whey powders ranked on value, dose and verification, see our [best whey protein powder](https://www.best-proteinpowder.com/best-whey-protein-powder/) guide.

## 2. Who Makes Oath, and What It Sells

Oath Nutrition is sold by Trove Nutrition, a subsidiary of Trove Brands, the privately held Utah company behind BlenderBottle and Owala. That background explains a lot about the brand: it sits naturally next to shaker bottles in sporting goods and big-box stores, and it has the retail relationships to land on Target, Walmart, Academy and Amazon quickly. Trove describes Oath as a sports performance brand.

Do not confuse it with OATH, a separate oat-based dairy alternative brand that also uses the name. When people search for Oath protein powder, they almost always mean Oath Nutrition and its clear whey. The two companies are unrelated, and the oat milk brand does not sell a whey protein powder.

Oath's range at the time of writing centers on Clear Protein, its clear whey isolate, sold in 18 and 20 serving pouches direct, 18 serving tubs at retailers such as Target and Academy, newer 15 serving tubs at Walmart according to trade coverage from Stack3d, and single-serve packets. Flavors listed on the brand's site include Frosty Lemonade, Coconut Colada, Coco Razz, Icy Blue Razz, Island Mango, Sunrise Passion Punch, Raspberry Lemonade and Brazilian Limeade, with retailers also listing Watermelon Fresca and seasonal limited editions.

Beyond clear whey, Oath sells a regular Whey Protein in dessert flavors, a canned Sparkling Energy plus Protein drink launched in April 2026 with 10 g of protein and 100 mg of caffeine, plus electrolytes, a pre-workout and creatine. Trove has described Oath as the best-selling clear protein at Target and a category leader on Amazon in its press materials. That is a brand claim, but its retail footprint is real and easy to see.

## 3. What Is in Oath Clear Whey

Target's listing for the Island Mango tub gives the clearest panel we found at the time of writing: a 26.3 g scoop with 100 calories, 20 g of protein, 2 g of total carbohydrate, 1 g of sugar, 0.5 g of fat, 5 mg of cholesterol and 10 mg of sodium. The product description across flavors claims 100 to 110 calories and less than 1 g of sugar, so treat the exact figures as flavor dependent. Oath's own site describes every flavor as having 20 g of complete protein and no added sugar.

The protein is whey protein isolate, which Oath describes as grass-fed and put through an ultra-filtration process. Clear whey is typically made by acidifying and further filtering isolate so it dissolves into a thin, translucent drink rather than a creamy shake. That is why Oath lists acids such as malic acid and citric acid on its panels, and why clear whey tastes more like a sports drink than a milkshake.

The sweetener on the Island Mango panel is sucralose. Oath's Frosty Lemonade listing describes the product as flavored with natural and artificial flavors. If you avoid sucralose or artificial flavors, check the specific flavor before you buy, because formulas vary across the range. Some flavors also contain coconut milk powder, which Target lists as a coconut allergen on the Island Mango tub, and colors from plant sources such as turmeric and annatto.

| Per serving (Island Mango label) | Amount |
| --- | --- |
| Scoop size | 26.3 g |
| Calories | 100 |
| Protein | 20 g |
| Carbohydrate / sugar | 2 g / 1 g |
| Fat | 0.5 g |
| Sodium | 10 mg |
| Sweetener | Sucralose |

### It is not lactose-free

Oath's own answers in Target's Q&A state that the clear whey naturally contains lactose and is not lactose-free or casein-free. Whey isolate is usually far lower in lactose than concentrate, and many people with mild intolerance handle it fine, but if you are sensitive, start with a single-serve packet rather than a full tub. Our explainer on [whey vs whey isolate](https://www.best-proteinpowder.com/whey-vs-whey-isolate/) covers why isolate is usually easier to digest.

## 4. The Oath Protein Lineup, Ranked

These are the Oath protein products we could confirm on the brand's own site and on major retailer listings at the time of writing, flagship first, followed by two clearly labelled alternatives from other brands. Nutrition figures are per the label or the brand's published claims at the time of writing and vary by flavor, so check the panel on the exact flavor you buy.

### 1. Oath Nutrition Clear Whey Isolate Protein Powder

**Award:** Best Overall Oath | **Type:** Clear whey isolate powder

- **Protein / serving:** 20 g (label, about 26 g scoop)
- **Calories:** About 100-110 (varies by flavor)
- **Third-party testing:** Brand claim; no certification confirmed
- **Best for:** Light post-workout drinks

Oath's flagship is a clear, juice-style whey isolate with 20 g of protein in about 100 to 110 calories per scoop, per retailer labels at the time of writing, with about 2 g of carbohydrate and no added sugar. The brand describes the isolate as grass-fed and ultra-filtered. The Island Mango panel lists sucralose as the sweetener. It comes in a long list of fruit flavors in 18 and 20 serving sizes, and is easy to find at Target, Walmart and Amazon.

**Bottom line:** A good clear whey to buy on sale if you want a light, refreshing shake.

**Pros:**

- 20 g whey isolate protein in about 100 calories, per the label
- Wide range of fruit flavors; widely stocked in US stores
- Frequent sales make it competitive for a clear whey

**Cons:**

- No third-party certification we could confirm
- Uses sucralose; contains lactose and, in some flavors, coconut
- Expensive per 25 g at full retail price

[Check price on Amazon](https://www.amazon.com/dp/B0DHT1K42Y?tag=sktiger-20)

### 2. Oath Nutrition Whey Protein

**Award:** Most Protein per Scoop | **Type:** Whey protein powder, milkshake style

- **Protein / serving:** 25 g (brand)
- **Calories:** Check panel
- **Third-party testing:** No certification confirmed
- **Best for:** Creamy shakes

Oath's regular whey is the brand's answer for people who want a creamy shake. Oath lists 25 g of protein per serving with 12.2 g of essential amino acids and 2.7 g of leucine, in dessert flavors such as Chocolate Dream, Chocolate Brownie and Vanilla Bean Ice Cream, 25 servings per bag. Several flavors were sold out on Oath's site when we checked, and we could not confirm calories or sweeteners from the published text, so check the panel.

**Bottom line:** The better-value Oath if you want a regular whey and can find your flavor in stock.

**Pros:**

- 25 g of protein and 2.7 g of leucine per serving, per the brand
- Mid-tier cost per 25 g at list price
- Dessert flavors for buyers who want a creamy shake

**Cons:**

- Several flavors sold out at the time of writing
- Calories and sweetener not confirmed; no certification confirmed

[Check price on Amazon](https://www.amazon.com/s?k=Oath%20Nutrition%20Whey%20Protein&tag=sktiger-20)

### 3. Oath Nutrition Clear Protein Single-Serve Variety Pack

**Award:** Best for Trying Flavors | **Type:** Clear whey isolate, single-serve packets

- **Protein / serving:** About 20 g (brand)
- **Calories:** About 100-110 (varies by flavor)
- **Third-party testing:** Brand claim; no certification confirmed
- **Best for:** Sampling, travel

Oath sells its clear whey in single-serve packets, including a 12-count variety pack on Amazon, with the same roughly 20 g of whey isolate protein per serving as the tubs, per the brand. Packets are the sensible way to find out whether you actually like clear whey, and which flavor, before buying a full tub. They also travel well. As a daily habit, though, they cost noticeably more per gram than the tubs or pouches.

**Bottom line:** Buy this first if you have never tried clear whey; switch to a tub once you know your flavor.

**Pros:**

- Try several flavors before committing to a tub
- Same 20 g whey isolate formula, per the brand
- Convenient for travel and gym bags

**Cons:**

- Highest cost per 25 g of protein in the Oath range
- Same sucralose and lactose caveats as the tub

[Check price on Amazon](https://www.amazon.com/dp/B0FRB2WTCL?tag=sktiger-20)

### 4. Isopure Infusions

**Award:** Alternative: Clear Whey From an Isolate Specialist | **Type:** Clear whey isolate powder

- **Protein / serving:** About 20 g
- **Calories:** Check panel; varies by flavor
- **Third-party testing:** Check certifier database
- **Best for:** US buyers, low sugar

Isopure Infusions is the clear version of Isopure's long-running whey isolate line, sold widely in US stores and online. It mixes into a light, fruit-flavored drink with about 20 g of protein per scoop and close to zero sugar and fat, per the label at the time of writing. It suits buyers who want a clear whey from a brand with a long isolate track record and easy availability.

**Bottom line:** A conservative clear whey pick from a long-established isolate brand.

**Pros:**

- About 20 g whey isolate protein per scoop, per the label
- From a brand known for low-carb isolates for decades
- Widely stocked, so easy to compare on price

**Cons:**

- Premium cost per 25 g of protein
- Narrower flavor range than Oath; check certification

[Check price on Amazon](https://www.amazon.com/dp/B081ZV26B2?tag=sktiger-20&linkCode=ll1)

### 5. Optimum Nutrition Gold Standard 100% Whey

**Award:** Alternative: Better Value Regular Whey | **Type:** Whey blend (isolate + concentrate)

- **Protein / serving:** About 24 g (varies by flavor)
- **Calories:** Check panel; varies by flavor
- **Third-party testing:** Informed Choice (confirm flavor)
- **Best for:** Most people

If you do not specifically want clear whey, Gold Standard gives you more protein per scoop for less money. It delivers about 24 g of protein per scoop with whey protein isolate listed first in the blend, per the label at the time of writing, sits in the mid price tier and is promoted as Informed Choice certified. It is a creamy shake rather than a juice-style drink.

**Bottom line:** The better buy if value and verification matter more than a juice-like texture.

**Pros:**

- About 24 g protein per scoop, per the label
- Promoted as Informed Choice certified; confirm your flavor
- Very wide flavor range and availability

**Cons:**

- Creamy shake, not a light clear drink
- Flavored versions use artificial sweeteners

[Check price on Amazon](https://www.amazon.com/dp/B000GISTZ4?tag=sktiger-20&linkCode=ll1)

## 5. Which Oath Protein to Buy

If you came to Oath for clear whey, buy Clear Whey Isolate in the 18 or 20 serving size, in whichever flavor appeals. It is the product the brand is built around, the most widely available, and the one with the most buyer feedback. The 18 serving tub on Amazon is the easiest to buy and frequently discounted, and the brand's own pouches are often cheaper still during site-wide sales.

If you want a traditional milkshake-style protein from the same brand, Oath Whey Protein is the better fit. Oath's page lists 25 g of protein per serving, 12.2 g of essential amino acids and 2.7 g of leucine, in flavors such as Chocolate Dream, Chocolate Brownie and Vanilla Bean Ice Cream, with 25 servings per bag. Several flavors were sold out on Oath's site when we checked, and the supplement panel was only published as an image, so we could not confirm calories or the sweetener system. Check the panel when you buy.

The single-serve packets and the 12-count variety pack are the right way to test flavors before committing. Clear whey is polarizing: some buyers love its juice-like taste, others find it too sweet or too acidic. Spending a few dollars to try three or four flavors is cheaper than abandoning a full tub. As a daily habit, though, packets cost noticeably more per gram than tubs.

The Sparkling Energy plus Protein cans are a different product altogether. With 10 g of protein and 100 mg of caffeine per can, they are a protein-boosted energy drink rather than a protein supplement, and they are a poor way to hit a protein target. Treat them as an alternative to an energy drink, not to a shake. Oath's electrolytes, pre-workout and creatine sit outside the scope of this review.

If you are torn between clear whey and regular whey in general, our [best clear protein powder](https://www.best-proteinpowder.com/best-clear-protein-powder/) guide ranks the clear options against each other, and the regular-whey pillar linked above covers the milkshake side.

## 6. Cost per 25 g of Protein

Cost per 25 g of protein is the fairest way to compare powders with different scoop sizes. Take the price, divide by servings, then multiply by 25 divided by the protein per serving. For Oath Clear Whey, which has 20 g per scoop, that adds 25 percent to the per-scoop price, so a 2.20 dollar scoop becomes about 2.80 dollars per 25 g of protein.

Prices at the time of writing ranged widely. Target and Academy listed 18 serving tubs at about 35 to 40 dollars, which works out to roughly 2.40 to 2.80 dollars per 25 g. Deal sites tracked the Amazon 18 serving tub at around 28 to 30 dollars with Subscribe and Save, or roughly 2 dollars per 25 g. Oath's own site showed its 20 serving pouches discounted to around 22 dollars from a 45 dollar regular price, which would be about 1.40 dollars per 25 g at the sale price.

> **Approximate cost per 25 g of protein**
>
> - **~$1.40**: Clear Whey, brand-site sale
> - **~$2.00**: Clear Whey, Amazon deal
> - **~$2.80**: Clear Whey, full retail
> - **~$1.80**: Oath Whey Protein, list

Oath Whey Protein looks better on paper: the brand listed it at about 45 dollars for 25 servings of 25 g, which is roughly 1.80 dollars per 25 g. That is mid-tier pricing for a regular whey, broadly in line with large-brand blends at full price, though mainstream tubs in bigger sizes often go lower. Single-serve packets, at around 3 dollars each at retail, cost roughly 3.70 dollars per 25 g.

These are approximate figures from prices that change weekly. The practical takeaway is that Oath Clear Whey is a buy-on-sale product. Its sale price is genuinely good for a clear isolate, and its full price is not. If cost per gram is your main concern, our [best cheap protein powder](https://www.best-proteinpowder.com/best-cheap-protein-powder/) guide shows where the floor is.

## 7. Testing and Quality Claims

Oath's quality claims are reasonable but thin on documentation. In Target's Q&A, the brand says its clear whey is made in the United States in cGMP-certified facilities and undergoes third-party testing. cGMP refers to the FDA's current good manufacturing practice rules, which every supplement maker is expected to follow, so it is a baseline rather than a distinction. The brand's product pages we checked did not name a specific certification program.

We could not find Oath products listed with NSF Certified for Sport, Informed Choice or Informed Sport at the time of writing. Those programs test for banned substances and publish searchable databases, which is what drug-tested athletes need. If you compete in a tested sport, buy a clear whey that carries one of those marks and check your lot in the certifier's database.

For everyone else, the risk profile of a whey isolate is generally low. Dairy proteins tend to test lower for heavy metals than plant proteins, and isolate is a highly refined ingredient. Oath's labels are also simple and specific, listing the protein source, sweetener and acids clearly, which is more than some flavor-led brands manage. What is missing is independent proof you can look up yourself.

> **WHAT TO ASK FOR**
>
> **Third-party testing claims are only as good as the results you can see.**
>
> If testing matters to you, ask the brand which lab tests its batches, what it tests for, and whether results are published per lot. A named certification with a public database is the standard to compare against.

Our guide on whether [protein powder is safe](https://www.best-proteinpowder.com/is-protein-powder-safe/) covers how to read testing claims and what the contaminant data across the category actually shows.

## 8. Who Should Skip Oath

Skip Oath if you are a drug-tested athlete. Without a certification we could confirm, there is no public database to check a lot against, and that is the one thing tested athletes cannot compromise on. Whichever clear whey you consider instead, search the NSF and Informed Sport databases for the exact product and flavor before you buy, because certification status varies by product and market.

Skip it if you avoid sucralose or artificial flavors. The Island Mango panel lists sucralose, and the Frosty Lemonade listing mentions natural and artificial flavors. Some clear wheys use stevia or monk fruit, but most of the category relies on sucralose to cover the acidity, so you may have to accept a smaller selection if this matters to you.

Skip it if you are lactose intolerant enough that even isolate bothers you, or if you have a coconut allergy, since some flavors contain coconut milk powder. Skip it if you want the most protein per dollar: at full retail, a standard whey blend delivers more protein per scoop for less. And skip clear whey generally if you want a creamy, filling shake, because it is designed to taste like a drink, not a dessert.

Finally, skip it if you have a known kidney condition, are pregnant or take medication without checking first. Protein powder is a food supplement, but a large change in protein intake is worth discussing with a doctor or registered dietitian. Nothing on this page is medical advice.

## 9. How Oath Compares With Other Wheys

Against Myprotein Clear Whey Isolate, Oath is very similar on paper: about 20 g of whey isolate per serving, minimal fat and sugar, fruit flavors and foam when shaken, per buyer feedback for both. Myprotein has a longer track record in the category and a wider flavor range, while Oath is easier to find in US stores. Price is usually the tie-breaker, and both brands run frequent sales. Our [Myprotein review](https://www.best-proteinpowder.com/myprotein-review/) covers its range.

Against Isopure Infusions, Oath offers more flavors and similar protein per scoop. Isopure has decades of experience making low-carb whey isolates and wide distribution, and its Infusions line is its clear whey. If you prefer a brand with a long isolate history, Isopure is the conservative pick; our [Isopure review](https://www.best-proteinpowder.com/isopure-protein-powder-review/) goes further.

Against a regular whey like Optimum Nutrition Gold Standard, Oath Clear Whey loses on protein per scoop, about 20 g versus roughly 24 g, and usually on cost per gram. Gold Standard is also promoted as Informed Choice certified. What Oath offers instead is a completely different drinking experience, which matters if you have stopped using protein because you are tired of milkshakes. Flavor-led alternatives such as [Ryse](https://www.best-proteinpowder.com/ryse-protein-powder-review/) and [Ghost](https://www.best-proteinpowder.com/ghost-protein-powder-review/) sit in a similar space.

| Product | Protein / serving | Format | Verification |
| --- | --- | --- | --- |
| Oath Clear Whey Isolate | 20 g | Clear, juice-style | Brand third-party testing claim |
| Myprotein Clear Whey Isolate | About 20 g | Clear, juice-style | Check certifier database |
| Isopure Infusions | About 20 g | Clear, juice-style | Check certifier database |
| ON Gold Standard 100% Whey | About 24 g | Creamy shake | Informed Choice (confirm flavor) |

In short, Oath competes well within clear whey and poorly against regular whey on cost per gram. Choose it for taste and convenience, not for value or verification.

## 10. Getting the Most From Oath Clear Whey

Clear whey foams when shaken, and buyers report the same with Oath. The common fixes are to add the powder to cold water rather than the other way round, shake gently or stir, and let it sit for a minute so the foam settles. Some people mix it in a large glass with a spoon instead of a shaker bottle. Using very cold water or ice tends to improve both the texture and the taste.

Drink it fairly soon after mixing. Oath's own Q&A notes that the product can separate if it sits, and recommends shaking between sips. That is normal for clear whey, which is a thin solution rather than a stable emulsion, and it is one reason the category suits a quick post-workout drink better than a slow sip at a desk.

Because each scoop holds 20 g, consider a scoop and a half after training if you want a dose closer to 30 g, or pair it with a protein-rich meal. Clear whey also works well in places where a creamy shake would not, such as mixed into sparkling water, frozen into ice pops or blended with ice into a slush. Avoid mixing it with milk: the acidity can curdle it, and that defeats the point of buying a clear protein.

If you are using protein for weight management, clear whey's low calorie count and light texture can make it easier to fit in. If you are using it to gain weight or muscle on a budget, a regular whey or a gainer is the more efficient tool. Our [protein calculator](https://www.best-proteinpowder.com/protein-calculator/) will tell you how many scoops your target actually needs.

## 11. Common Mistakes to Avoid

### Buying a full tub before trying clear whey

Clear whey is polarizing. Some people love the juice-like taste, others find it too sweet or too acidic. Buy single-serve packets or the variety pack first, decide which flavor you actually enjoy, and only then commit to a tub, so you do not end up with a nearly full container in the cupboard.

### Paying full retail price

Oath runs frequent sales on its own site and on Amazon, and the gap is large. At full retail the clear whey costs roughly 2.80 dollars per 25 g of protein, while sale prices have dropped it well under 2 dollars. Wait for a promotion or use Subscribe and Save if you buy it regularly.

### Assuming third-party testing means certification

Oath says its products undergo third-party testing, but we could not find a named certification with a public database, such as NSF Certified for Sport or Informed Choice. Drug-tested athletes need a certified lot they can look up, so treat a general testing claim as a starting point, not proof.

### Mixing clear whey with milk

Clear whey is acidified so it dissolves into a thin drink. Mixing it with milk can curdle it and wastes what you paid extra for. Use cold water, sparkling water or ice, stir rather than shaking hard, and let the foam settle for a minute before drinking.

### Counting one 20 g scoop as a full dose

Each clear whey scoop holds 20 g of protein, a little short of the 25 to 30 g many lifters aim for in one sitting. Use a scoop and a half after training, or pair the shake with a protein-rich meal, so you actually reach the dose you are targeting.

## 12. Frequently Asked Questions

### Is Oath protein powder good?

Oath Clear Whey Isolate is a solid clear whey, with about 20 g of whey isolate protein in 100 to 110 calories and minimal sugar, per retailer labels at the time of writing. Buyers generally like the flavors. Its weaknesses are a premium price outside of sales, sucralose as the sweetener and no third-party certification we could confirm.

### Who owns Oath Nutrition?

Oath Nutrition is sold by Trove Nutrition, a subsidiary of Trove Brands, the privately held Utah company behind BlenderBottle and Owala. Trove describes Oath as a sports performance brand. It is unrelated to OATH, a separate oat-based dairy alternative brand that happens to share the name and does not sell whey protein.

### How much protein is in Oath Clear Protein?

Each serving of Oath Clear Protein contains 20 g of protein from whey isolate, per the brand and retailer labels at the time of writing. The Island Mango tub lists a 26.3 g scoop with 100 calories, 2 g of carbohydrate and 1 g of sugar. Figures vary slightly by flavor, so check the panel on yours.

### Is Oath clear whey lactose-free?

No. Oath's own answers in Target's product Q&A say the clear whey naturally contains lactose and is not lactose-free or casein-free. Whey isolate is low in lactose compared with concentrate, so many people with mild intolerance tolerate it, but if you are sensitive, try a single-serve packet before buying a tub.

### What sweetener is in Oath protein?

The Island Mango Clear Whey panel lists sucralose, and the Frosty Lemonade listing describes natural and artificial flavors. Oath says its clear protein has no added sugar. We could not confirm the sweetener system for the regular Oath Whey Protein from published text, so check the panel on the specific product and flavor you buy.

### Is Oath protein third-party tested?

Oath says its clear whey is made in the United States in cGMP-certified facilities and undergoes third-party testing. We could not find Oath products listed with NSF Certified for Sport, Informed Choice or Informed Sport at the time of writing. Drug-tested athletes should choose a product with a certification they can verify by lot number.

### Where can I buy Oath protein?

Oath sells direct through its own site and through Target, Walmart, Academy Sports and Amazon at the time of writing. The 18 serving Clear Whey tub and a 12-count single-serve variety pack are listed on Amazon. Prices vary widely between retailers and promotions, so compare the cost per 25 g of protein before buying.

## Related Whey Protein Guides

- [Best Whey Protein Powder](https://www.best-proteinpowder.com/best-whey-protein-powder/): Wheys ranked on value, dose and verification.
- [Best Clear Protein Powder](https://www.best-proteinpowder.com/best-clear-protein-powder/): The clear wheys and protein waters worth buying.
- [Isopure Protein Review](https://www.best-proteinpowder.com/isopure-protein-powder-review/): The long-running isolate brand and its clear Infusions line.

## The Bottom Line

Oath Clear Whey Isolate is a well-made, widely available clear whey with about 20 g of isolate protein in roughly 100 calories and a long list of fruit flavors. It is a pleasant way to get protein if milkshakes have lost their appeal, and on sale it is fairly priced for its category. Start with the packets, find a flavor you like, then buy the tub on promotion.

If you need certification you can look up, the most protein per dollar or a sweetener other than sucralose, Oath is the wrong pick. A regular whey such as Gold Standard gives more protein for less, and our [best whey protein powder](https://www.best-proteinpowder.com/best-whey-protein-powder/) guide ranks the field on value and verification.

## More in Brand Reviews

Guides in this category that pair with what you just read.

- [Whey vs Whey Isolate](https://www.best-proteinpowder.com/whey-vs-whey-isolate/)
- [Best Whey Protein Isolate](https://www.best-proteinpowder.com/best-whey-protein-isolate/)
- [Myprotein Review](https://www.best-proteinpowder.com/myprotein-review/)

About the Author

[Best Protein Powder Editorial Team](https://www.best-proteinpowder.com/authors/editorial-team/), Supplements Desk

The editorial team reads the label, the certificate and the price per gram of protein before a powder gets near a ranking -- and says plainly when a cheaper tub does the same job.

[Full profile](https://www.best-proteinpowder.com/authors/editorial-team/) | [How we test](https://www.best-proteinpowder.com/how-we-test/)