Isopure Clear Protein Review: Is the Original Clear Whey Still Worth It?

ByKx9

Disclosure: Rovuno Reviews may earn a commission if affiliate links are added to this page later. This draft currently uses a standard manufacturer link. We have not personally tested this product; our review is based on the current label information, price, manufacturer disclosures, customer-review patterns, and relevant protein research.

Isopure has been making whey isolate protein since long before “clear whey” was a trend — its original Zero Carb line has been a gym-bag staple for two decades. Isopure Clear Protein (previously sold as Isopure Infusions) is the brand’s answer to the clear whey boom: a 20-gram-protein drink mix meant to taste like a fruit drink instead of a shake. Here’s whether the original still holds up against newer clear whey brands.

Quick verdict

Isopure Clear Protein is a solid, no-surprises option for anyone who wants a light, fruity protein drink from a brand with a long manufacturing track record. At 20 g of protein per serving with no added sugar and no artificial sweeteners or flavors, it’s straightforward and easy to trust on the label. It isn’t the cheapest clear whey on the market, and 20 g per serving is on the lower end for this category, so value-focused buyers should compare cost per gram of protein before choosing it over newer competitors.

Isopure Clear Protein at a glance

  • Protein type: 100% whey protein isolate
  • Protein per serving: 20 grams
  • Servings: 16 (1 lb) or 26 (1.43 lb)
  • Flavors: Citrus Lemonade, Mango Lime, Mixed Berry, Pineapple Orange Banana, Tropical Punch, Watermelon Lime, Raspberry Island Tea, Strawberry Peach Tea
  • Price checked: Approximately $64.99 for the 26-serving size, about $2.49 per serving
  • Ingredients: Brand states only 5 total ingredients, with no artificial sweeteners or flavors and no added sugar
  • Attributes: Gluten-free, low-carb

What we like

  • Short, simple ingredient list. A 5-ingredient label is easy to evaluate at a glance, and there’s no fine print about “natural flavors” hiding a long list of additives.
  • No added sugar or artificial sweeteners claimed. That’s a meaningful difference from many competitors that lean on sucralose.
  • Established manufacturer. Isopure has decades of whey isolate production experience, which matters for consistency and quality control.
  • Wide flavor range. Eight flavors gives more room to find one you’ll actually finish the tub of.

What to consider

  • 20 g of protein per serving is on the lower side. Some newer clear whey competitors pack 25–28 g into a similar serving size.
  • Price per gram of protein is higher than some alternatives. At roughly $2.49 per serving for 20 g, you’re paying about $0.125 per gram of protein before any sale pricing — worth comparing directly against whatever else you’re considering.
  • No third-party sport certification advertised (such as NSF Certified for Sport or Informed Sport) on this specific line, which may matter if you’re a tested athlete.

How it compares

Against a newer entrant like NutraBio Clear Whey Isolate (also 20 g protein per serving, similarly priced per serving, and third-party tested with a cold-processed WPI90 isolate), Isopure’s main edge is brand longevity and flavor variety, while NutraBio’s edge is third-party testing and a slightly lower calorie count per serving. Compared to a standard creamy whey isolate or concentrate, Isopure Clear Protein will always feel lighter and less filling — that’s the format, not a flaw specific to this brand.

Who it’s for

Good for: people who want a straightforward, low-additive clear whey from an established brand, and who value flavor variety. Less ideal for: anyone optimizing purely for protein-per-dollar, or athletes who specifically need NSF Certified for Sport or Informed Sport verification.

Bottom line

Isopure Clear Protein is a dependable, well-labeled clear whey from a brand that’s been making isolate protein for a long time. It’s not the most protein-dense or the cheapest option in the category, but the short ingredient list and lack of artificial sweeteners make it an easy one to trust if you’re new to clear whey and want to start with a known name.

Sources

  • Manufacturer product page and label information (Isopure Clear Protein)
  • Retail listings for pricing and serving-size verification
  • General clear whey category research, see our Clear Whey Protein Explained guide

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