Dr. Tyna Moore · 2026-06-26 · Tyna Moore (host), Oliver Amdrup-Chamby
The Protein Mistakes Costing You Muscle in Midlife | Puori
27 research-tied claims examined: 1 contradicted 1 overstated 4 context 11 supported 2 corroborated online 8 unverified
8 No source found (not proven false)
A Clean Label Project study found that 47% of top-selling protein powders in the United States exceeded California Proposition 65 limits for heavy metals.
"We've seen the Clean Label Project's category study in 2025 come out like saying that 47% of America's best-selling protein—so, they tested 83% of the category. So, it's a very representative like like you know, snapshot of the industry. And out of that, 47% was above Proposition 65 standards for heavy metals." (said at 0:19:20)
No published record matching a Clean Label Project study finding that 47% of top-selling protein powders exceeded California Proposition 65 heavy metal limits was located; this does not prove the claim false.
Lead was the primary heavy metal found exceeding Proposition 65 standards in the Clean Label Project protein powder study.
"And the main one was lead." (said at 0:19:51)
No published record matching the claim that lead was the primary heavy metal found exceeding California Proposition 65 standards in the Clean Label Project protein powder study was located; this does not prove the claim false.
In the Clean Label Project study, 77% of plant-based protein powders tested exceeded Proposition 65 standards for heavy metals.
"when we look at the plant proteins in that study, they were, you know, I think it was 77% of the plant proteins was above Proposition 65 standards on these heavy metals." (said at 0:20:12)
No published peer-reviewed record matching the Clean Label Project study finding that 77% of plant-based protein powders exceeded California Proposition 65 standards for heavy metals was located; this does not prove the claim false.
The Clean Label Project's category study tested 83% of America's top-selling protein powder products.
"We've seen the Clean Label Project's category study in 2025 come out like saying that 47% of America's best-selling protein—so, they tested 83% of the category." (said at 0:19:40)
No published peer-reviewed record matching the Clean Label Project's category study findings, methodology, or specific market coverage percentages for protein powder products was located; this does not prove the claim false.
Whey protein isolate processing removes the lactose present in whey concentrate.
"And and I would also say if you if you're lactose intolerant, the isolate that you know, gets the out of there." (said at 0:32:13)
No published record matching the specific claim that whey protein isolate processing removes the lactose present in whey concentrate to make it suitable for individuals with lactose intolerance was located; this does not prove the claim false.
Consumer Reports testing showed heavy metal contamination across protein powder crop types was not flavor-dependent.
"and I think that was in Consumer Reports, they did another study on protein powder as well, that they actually said it was they couldn't see that it was flavor dependent where the heavy metals. They would see it in both the in both type of crops as well." (said at 0:34:16)
No published record matching the claim that Consumer Reports testing showed heavy metal contamination in protein powders was not flavor-dependent across crop types was located; this does not prove the claim false. While published risk assessments (such as Bandara et al., 2020) have evaluated Consumer Reports' data on heavy metals in protein powders, peer-reviewed scientific literature evaluating specific flavor-independence across crop types from those tests was not identified.
The Clean Label Project study found that cacao-based protein powders had elevated heavy metal levels due to the presence of cacao.
"Because it looked like at least in the Clean Label Project study that the cacao based were more had higher amounts of heavy metals due to cacao in there." (said at 0:34:33)
No published record matching the Clean Label Project study's specific findings on cacao-based protein powders and heavy metal contamination was located; this does not prove the claim false.
Between one in six and one in eight Americans are currently taking or will use a GLP-1 receptor agonist.
"and I think what like one in six to one in eight Americans are on a GLP-1 or will use a GLP-1" (said at 0:46:12)
No published record matching the claim that between one in six and one in eight Americans are currently taking or will use a GLP-1 receptor agonist was located; this does not prove the claim false.
Unverified means no publication matching the claim was located; it does not prove the claim false. Spotted an error? See the corrections policy - disputes from the people quoted are prioritized.