Google AI Overviews
The question asked
Which protein powders actually contain what they claim
From the recorded answer
Clean Simple Eats (Whey Protein): Contained the lowest amount tested at 0.21 micrograms per serving (42% of CR's level of concern).
Read recorded answer
Recorded answer text · Google AI Overviews · 18 October 2026
Recent testing by Consumer Reports found that more than two-thirds of tested protein powders and shakes exceeded daily safety recommendations for toxic heavy metals like lead, cadmium, and arsenic.
### Safest Options (Lowest Lead Levels) According to Consumer Reports, a small number of dairy-based and whey protein powders tested well below daily safety limits of 0.5 micrograms per serving:
- Clean Simple Eats (Whey Protein): Contained the lowest amount tested at 0.21 micrograms per serving (42% of CR's level of concern). - Equate (Walmart Brand Whey Protein): Contained 0.27 micrograms per serving (55% of CR's level of concern). - General Dairy/Whey Powders: Generally showed significantly lower heavy metal levels than plant-based or organic alternatives because dairy acts as a natural filter.
### Products with High Contamination (To Avoid or Limit) Testing revealed severe heavy metal contamination, particularly among plant-based, organic, and mass-gainer supplements:
- Naked Nutrition (Vegan Mass Gainer): Contained 7.7 micrograms of lead per serving (about 1,570% of the daily limit). - Huel (Black Edition Plant-Based Powder): Contained 6.3 micrograms of lead and 9.2 micrograms of cadmium per serving (more than double the daily safe limit for cadmium). - Garden of Life (Sport Organic Plant-Based Protein): Contained elevated lead levels, recommended for use only once a week. - Momentous (100% Plant Protein): Contained elevated lead levels (though the company noted those specific lots were discontinued). - MuscleMeds (Carnivor Mass): The only non-plant option with lead exceeding 200% of the daily concern limit. - Optimum Nutrition (Serious Mass): Tested with 8.5 micrograms of inorganic arsenic per serving.
### How to Verify What Is Inside Your Powder
- Informed Protein Certification: Look for independent testing programs like Informed Protein, which audits manufacturing facilities, screens for common adulterants, and verifies free amino acid content against label claims. - Clean Label Project: Offers transparency reports, though their data shows that roughly 47% of general protein powders and 79% of organic powders exceed Proposition 65 limits for heavy metals. - Watch for "Protein Spiking": Some low-quality brands add cheap amino acids like glycine or taurine to inflate nitrogen-based protein test results. Third-party testing helps ensure the listed protein source matches the actual contents.
If you'd like, let me know:
- What type of protein powder you currently use (whey, plant-based, etc.) - Your primary goal (muscle gain, meal replacement, vegan diet)
I can help you look up specific brand testing results or safer alternatives.
