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Best Protein Powder

Sports Research

Whey Protein Isolate

Sports Research Whey Protein Isolate is a whey isolate protein powder with 25 g of protein per 1 scoop (41 g). It scores 59/100 on the TBPP Quality Score. It is Informed Sport.

Informed SportAdded amino acids
Our score
59/100
Methodology v1.0
Protein
25g
1 scoop (41 g)
Sugar
—
Per serving
Protein by weight
61%
Per serving
$2.00
$2.00 per 25 g protein

Nutrition per serving

Dutch Chocolate flavor, from the label.

Nutrition per serving
Serving size1 scoop (41 g)
Protein25 g
Calories150
Carbohydrates4 g
SugarNot verified
Fat4 g
Sodium250 mg
Protein by weight61%
Leucine3.85 g
BCAAs6.9 g

How it scored

59 of 100 points. How we score

CriterionPointsWhy
Protein density14 / 3061% of each scoop is protein
Third-party testing25 / 25Lot-tested for banned substances
Label transparency10 / 20adds free amino acids that inflate the protein number
Sugar0 / 10Sugar not verified
Ingredient simplicity6 / 10Mix of natural and artificial flavors or sweeteners
Verified label data4 / 56 of 7 label values verified

Formula and label

Formula and label
TypeWhey Isolate
Protein sourcesWhey Protein Isolate, Sodium Caseinate
Third-party testingInformed Sport
SweetenersSucralose, Acesulfame Potassium
Proprietary blendNo
Added free amino acidsYes
DietaryGluten-Free, Non-GMO
AllergensMilk, Tree Nuts (Coconut)
Made bySports Research · USA
Sold atSports Research (direct), Walmart

Price

$49.95 for 25 servings (2.26 lb bag). About $2.00 per serving, or $2.00 per 25 g of protein.

Sizes: 25 servings (2.26 lb), 60 servings

Flavors (6)

  • Dutch Chocolate
  • Creamy Vanilla
  • Dark Chocolate
  • Chocolate Peanut Butter
  • Fruity Cereal
  • Unflavored

Sources

Nutrition from the brand's back-label image for the 2 lb Dutch Chocolate bag (FG410, UPC 023249091868) on sportsresearch.com, 2026-10-14: 1 scoop 41 g, about 25 servings, 150 kcal, 4 g fat (3.5 g sat), 4 g carbs, 2 g fiber, total sugars listed as '<1 g' (so sugar_g left null), 25 g protein, 250 mg sodium, 3000 mg MCTs and 1000 mg added free L-leucine. Label states total leucine about 3850 mg (2850 mg naturally occurring + 1000 mg free) and 6.9 g total BCAAs. Ingredients include sodium caseinate (minor) besides whey isolate; sweetened with sucralose and acesulfame K with natural flavors; contains milk and tree nuts (coconut, from MCT). Informed Sport, IGEN Non-GMO Tested and gluten-free are shown on the brand page and label. Price $49.95 for 25 servings and $89.95 for 60 servings on the brand store. An older 5 lb DSLD label (268690, 2022) showed 40.5 g scoop and 220 mg sodium.

Good to know

Last checked 2026-10-14. Labels change, so check the package before buying if you have allergies. If you are pregnant, nursing or buying for a child, ask your doctor before adding a supplement.