Huberman Lab · 2025-09-22 · Andrew Huberman (host), Bret Contreras

Build Your Ideal Physique | Dr. Bret Contreras

59 research-tied claims examined: 2 contradicted 4 overstated 6 context 43 supported 4 unverified

4 No source found (not proven false)
0:11:06Andrew Huberman (host)unverifiedvery low

A 2020 study by the Environmental Working Group estimated that more than 200 million Americans are exposed to PFAS chemicals through drinking tap water.

"In fact, a 2020 study by the Environmental Working Group estimated that more than 200 million Americans are exposed to PFAS chemicals, also known as forever chemicals, through drinking tap water." (said at 0:11:06)

A matching PubMed record containing the specific 2020 Environmental Working Group (EWG) study estimate of 200 million Americans exposed to PFAS in tap water could not be retrieved and verified within the database search session. This verdict indicates that the specific publication record was not located in the search, which does not prove the claim false.

1:22:25Bret Contrerasunverifiedvery low

Genetic variations in the angiotensin-converting enzyme (ACE) gene determine whether an individual responds better to single-set versus multiple-set lower-body resistance training.

"And there's one study I remember on like the ACE gene, the angiotensin-converting enzyme gene. I don't know what the hell that has to do with strength and volume, but... it seemed that some people do better with lower body doing single sets versus multiple sets." (said at 1:22:25)

No published study was located demonstrating that genetic variations in the angiotensin-converting enzyme (ACE) gene determine whether an individual responds better to single-set versus multiple-set lower-body resistance training. While the ACE insertion/deletion (I/D) polymorphism has been studied in relation to muscle strength adaptations and cardiovascular responses to resistance exercise (e.g., PMID 16775548, which examined unilateral upper-arm training and found minimal variance explained), there is no validated scientific evidence establishing an ACE-dependent prescription for single- versus multiple-set lower-body training volume.

2:13:16Bret Contrerasunverifiedvery low

Research by Refalo assessing muscle swelling at 3 and 5 days post-exercise indicates that high-volume hypertrophy gains reflect true muscle tissue accretion rather than sustained edema.

"Some influencers have argued that it's just swelling, you're getting more swelling, but that is doubtful based on a study, I think it was from Refalo. It looked at the swelling three days after and five days after. It looks like that's legit." (said at 2:13:16)

A search of publications by Martin C. Refalo identified investigations on resistance training proximity-to-failure (e.g., training to failure vs. repetitions-in-reserve), load, and rest intervals, but found no published study by Refalo assessing muscle swelling/edema at 3 and 5 days post-exercise to distinguish muscle tissue accretion from edema. While the speaker was uncertain of the author ('I think it was from Refalo'), the specific study attributed to Refalo cannot be verified in the published scientific literature.

2:32:02Bret Contrerasunverifiedvery low

Using a rotisserie-style hip thrust apparatus allows an individual to lift approximately 10 to 20 percent more weight than a standard barbell hip thrust.

"So, especially if you use like a rotisserie hip thrust, you can use about 10 to 20% more weight." (said at 2:32:02)

No published peer-reviewed studies were identified that evaluated a 'rotisserie-style' hip thrust apparatus or quantified a 10% to 20% difference in load capacity compared to a standard barbell hip thrust. This finding does not necessarily disprove the practical observation, but it indicates the claim lacks formal scientific verification in published literature.

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.