Naked Nutrition Vegan Mass Gainer Vanilla
At a glance
Summary
Naked Nutrition Vegan Mass Gainer Vanilla scores 1/100. Consumer Reports lab testing (January 2024) found 7.70 mcg of lead per serving — the highest of all 23 protein products tested and over 15 times California's 0.5 mcg/day maximum allowable dose — plus 3.45 mcg cadmium and 2.41 mcg arsenic. A November 2025 class action (Caballero v. Naked Whey Inc., E.D. Cal.) alleges the product was marketed as “verified for purity” and “independently tested for heavy metals” despite these readings. The three-ingredient formula is otherwise clean, but mass-gainer users typically take multiple servings a day, multiplying exposure. Owned by Naked Nutrition.
Contaminants 3
Source: Consumer Reports protein-powder investigation (January 2024) — per-serving heavy-metal readings across 23 protein products; this product ranked worst for lead. Figures cited in Caballero v. Naked Whey Inc. (E.D. Cal., No. 2:25-at-01437, filed Nov 2025).
Lead 7.70 µg per serving High
Over 15 times California's Prop 65 maximum allowable dose (0.5 µg/day) in a single serving — the highest lead reading among all 23 protein products Consumer Reports tested. No safe lead exposure level is established.
Consumer Reports independent laboratory analysis, per-serving basis, January 2024.
Cadmium 3.45 µg per serving Moderate
84% of California's 4.1 µg/day maximum allowable dose in one serving — and mass-gainer users often take several servings a day.
Consumer Reports independent laboratory analysis, per-serving basis, January 2024.
Arsenic 2.41 µg per serving Low
Roughly a quarter of California's 10 µg/day inorganic-arsenic limit per serving; adds to the cumulative heavy-metal load alongside the lead and cadmium.
Consumer Reports independent laboratory analysis, per-serving basis, January 2024.
Key ingredients 3
Yellow Pea ProteinNeutral
Plant-based protein that's notably good for a legume but still less bioavailable than whey or other animal-source proteins, meaning more grams are needed to deliver the same usable amino acids for muscle protein synthesis. Naturally low in methionine, so it does not stand alone as a complete protein and is typically blended with rice. Pea crops are also well-documented soil accumulators of lead and cadmium — the suspected primary contamination route in this product.
See more about Yellow Pea Protein →Organic Brown Rice ProteinNeutral
USDA Organic plant protein commonly paired with pea to round out the amino acid profile. On its own, brown rice protein is naturally low in lysine and less bioavailable than whey, so a larger gram dose is required to deliver the same usable amino acids for muscle protein synthesis. Brown rice is also the most well-documented arsenic accumulator in the food supply — the suspected source of arsenic detected here.
See more about Organic Brown Rice Protein →Organic Tapioca MaltodextrinNeutral
Tapioca-derived complex carbohydrate (gluten-free alternative to wheat maltodextrin) used as the carb base for the 1,230-calorie mass-gainer profile. Higher glycemic index than whole-food carb sources, but inherent to the mass-gainer category.
See more about Organic Tapioca Maltodextrin →Processing
Processed Culinary Ingredients
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