Got a video you want us to fact-check?

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157 videos
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One Nutrient Deficiency Explains Premature Gray Hair
6:08

Siim Land

B12 deficiency is linked to premature graying in some cases, but reversal is rare and other factors like genetics and other nutrient deficiencies play major roles.

B12 deficiency is associated with premature graying in observational studies, but evidence for reversal is limited to rare case reports and does not establish causation.

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Is TRT safe? FDA revises official guidelines [New research]
7:19

Menno Henselmans

Testosterone replacement at normal levels does not increase heart disease or prostate cancer risk, but requires monitoring for blood thickening and lipid changes.

Evidence strongly supports that physiological testosterone replacement is safe for men with clinically low levels, with no increased risk of heart attacks or prostate cancer, but requires monitoring due to potential increases in red blood cell count and lipid shifts.

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Your Skin Loses 75% of This by Age 75 (New Fix)
11:12

Dr Brad Stanfield

Oral hyaluronic acid improves skin hydration and reduces wrinkles, but benefits stem from gut-mediated signaling, not direct absorption.

Evidence supports modest skin improvements from oral hyaluronic acid, but the mechanism relies on indirect gut pathways with conflicting bioavailability data.

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How Much Muscle Can You Gain? (& What Causes Growth?)
15:29

House of Hypertrophy

Muscle growth is driven by physical tension during lifting, not by hormones, pump, or metabolic burn.

Evidence strongly supports mechanical tension as the sole essential driver of muscle growth, while other proposed mechanisms lack credible support.

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This $2 Food Beats Every Nitric Oxide Supplement
9:14

Dr Brad Stanfield

Arugula provides reliable nitrate for nitric oxide production, outperforming inconsistent supplements and avoiding drug risks.

Evidence supports arugula as a safe, high-nitrate food that enhances nitric oxide through natural pathways, while supplements and drugs show inconsistency or tolerance issues.

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The Top 3 Reasons You’re Not Gaining Muscle
11:40

Menno Henselmans

Consistent training with full range of motion enhances muscle adaptation, while program hopping and partial reps hinder progress.

Evidence strongly supports that sticking to one program, using full range of motion, and tracking volume per muscle group leads to better muscle growth than frequent changes or partial reps.

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This Green Tea Trick Stops Cortisol and Visceral Fat (insanely fast)
8:40

Thomas DeLauer

Green tea may enhance fat oxidation without caffeine, but claims about cortisol and visceral fat receptors lack consistent human validation.

Some mechanisms like EGCG's effect on fat oxidation are supported, but key claims about receptor density and hormonal synergy lack robust evidence.

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Farmer Exposes: They Are Now Quietly Putting This In Your Meat…
23:18

Max German

Food additives like ractopamine and carbon monoxide are linked to health risks, but human evidence remains limited for some claims.

Multiple food additives are supported by scientific evidence for their presence and biological effects, though direct human health impacts are not fully established.

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#1 Best Food to UNCLOG Your Arteries (Backed by Science)
21:07

Dr. Eric Westman - Adapt Your Life

Carbohydrate restriction shows strong metabolic benefits, but plaque reversal claims lack direct comparative human trials.

Evidence for plaque reversal through diet and lifestyle is partially supported, with strongest backing for carbohydrate reduction and mixed evidence for other interventions.

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Got a video you want us to fact-check?

Submit any YouTube link and we'll analyze its claims against real research — usually within a few days.