Myths, tested
Anti-aging claims, graded by the evidence
Every popular anti-aging claim, taken one at a time: the verdict up top, the research underneath, and an honest grade — Strong, Promising, or Overhyped. Adapted from Look 40 at 60.
Do collagen creams work?
The molecule is too big to get where it's needed — and the evidence shows it.
PromisingIs 10,000 steps a day a real target?
The number came from a 1960s pedometer ad, not a study. The benefit is real; the round number isn't.
Weak or OverhypedDo antioxidant supplements slow aging?
The free-radical theory was seductive. The supplement trials largely didn't deliver — and some signaled harm.
Weak or OverhypedDo hangover and 'liver-support' pills work?
The supplement science here is weak-to-absent in human trials. The honest answer is to drink less, not to buy a shield.
PromisingAre biological age tests worth it?
Interesting, not a verdict. The science is real and improving — the consumer number is noisier than it looks.
StrongDoes sunscreen actually prevent skin aging?
Roughly 80% of how aged a face looks is ultraviolet exposure — which makes daily sunscreen the highest-return anti-aging product you can buy.
Weak or OverhypedDoes your metabolism really slow down at 40?
A study of 6,000+ people found per-pound calorie burn holds steady from your 20s to about 60. The midlife spread is real; the metabolic alibi mostly isn't.
StrongDoes grip strength predict how long you'll live?
Across ~140,000 people in 17 countries, weaker grip tracked with higher death risk — a stronger signal than blood pressure. Strength may be the closest thing to a longevity lever.
PromisingDoes intermittent fasting trigger autophagy in humans?
The biology is real and Nobel-winning; the human anti-aging payoff is mostly unproven — and fasting's edge over plain calorie control is thin.
Weak or OverhypedIs aging mostly genetic, or is it lifestyle?
The classic figure is ~25% genes; a 2025 reanalysis argues ~50%. Either way, a decisive share is in your hands — and for how young you look, even more so.
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