The claim fails against the available evidence.
Cochrane pooled 86 trials and 162,796 people: no effect on dying or on cardiovascular events, at high certainty. The benefit that is real needs 4 grams a day. And omega-3 raised atrial fibrillation risk 25% across 81,210 patients.
Twelve men trained both arms for 15 weeks, one arm in a bath of exercise-induced testosterone and growth hormone. The hormone-free arm grew 12%. The hormone-bathed arm grew 10%. Replicated in 49 trained men and 56 more.
Researchers pulled the 37 ingredients out of the 32 best-selling testosterone and ED supplements and found 105 trials — but “no whole supplement products have published RCT evidence.” And 91% of the five-star libido reports vanished when the reviews were filtered.
The harmonised normal range is 264 to 916 ng/dL — the man at the top has three and a half times the man at the bottom. Applied properly by age, the cutoff for a 27-year-old is 413, not 300. And in 197,883 men, time of day moved the number more than decade of life did.
The US military now screens every service member over 30. The Endocrine Society’s guideline recommends against routine screening of men in the general population, at its strongest grade. And a glucose drink pushed 15% of men with normal testosterone into the hypogonadal range.
Twenty-three randomised trials pooled together put berberine’s effect on body weight at 1.9 lb. Semaglutide, in the trial that made it famous, took off 33.7. Both numbers come from the best evidence available for each.
Partially hydrogenated vegetable oil genuinely harmed people: when 11 New York counties restricted trans fats, heart attacks and strokes fell an extra 6.2%. That fat is gone. The fear outlived it and reattached to the oil that's left — which is usually soybean, and which the bottle doesn't tell you.
Researchers measured urine pH across citrus juices: orange and grapefruit alkalised it, and lemon didn't — the ritual picked the wrong fruit. But lemon does have a real, evidence-backed use. It's kidney stones, it's for people who already get them, and orange juice may be better at it.
Canola is rapeseed bred low in erucic acid — the name literally means Canadian oil, low acid. The FDA ban people cite was against mustard oil, not this. Even in the rat studies the heart lesions were judged 'not related to erucic acid per se'. And in 13 head-to-head trials, canola lowered LDL more than olive oil did.
Cut dietary linoleic acid by 90% and tissue arachidonic acid doesn't move — the inflammation mechanism fails at step one. But the two recovered BMJ trials showed no mortality benefit and one showed higher deaths, which the reassurance articles never mention. Here is the whole file, including what's wrong with both halves.