Explainer
How much protein do you need after 40?
Protein needs rise with age just as appetite and muscle response fall. The practical targets, why breakfast is the meal that matters most, and what changes after 40.
Nutrition
Eating well after 40 is mostly about protein, fiber, and honesty.
Nutrition advice is the noisiest corner of health media, and most of the noise is either a diet with a name or a supplement with a promise. The evidence that matters after 40 is duller and more useful: protein needs rise just as appetite and muscle response fall, fiber does more work than almost any supplement, and the eating pattern you can keep beats the optimal one you can’t.
This hub covers protein targets and timing, fiber and gut basics, hydration, alcohol, and how to read a supplement label without being sold to.
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Evidence review
Are multivitamins worth it after 40?
The most-bought supplement in the world has the least impressive evidence behind it. What multivitamins do, who genuinely benefits, and why "insurance" is the wrong metaphor.
Evidence review
Creatine after 40: what the research says
One of the few supplements with substantial evidence behind it — and specific caveats after 40. What it does, who it may suit, who should ask a clinician first, and what the marketing overstates.
By subtopic
All articles
- ExplainerHydration after 40: what changes and what's overstated
Thirst gets less reliable with age and the kidneys concentrate urine less efficiently. What that actually means day to day, and why the eight-glasses rule was never a rule.
- Evidence reviewOmega-3s after 40: sorting evidence from marketing
Fish oil has one well-proven effect, several plausible ones, and a great deal of overreach. What EPA and DHA actually do, what dose, and whether fish beats capsules.
- Evidence reviewVitamin D after 40: what the evidence supports
The large trials disappointed on most of what vitamin D was sold for. Correcting a real deficiency still matters. Here is where the line falls, and what dose and testing actually make sense.
- ExplainerFiber after 40: the nutrient doing more work than your supplements
Most adults get about half the fiber they need, and the gap widens the decade the benefits matter most. The targets, the two kinds, and how to close the gap without a week of bloating.
- Evidence reviewIs intermittent fasting worth it after 40?
Most of the benefit traces to eating less, not to the clock. What the trials actually found, the muscle risk that gets specific after 40, and who should skip it.
- Evidence reviewAlcohol after 40: what the evidence now says
The old finding that moderate drinkers live longer has weakened substantially. What replaced it, how metabolism and medication change after 40, and what that means for you.
- How-toHow to read a supplement label without being sold to
A practical walkthrough of the Supplement Facts panel — serving size games, proprietary blends, elemental weights, third-party marks, and the wording that means nothing.
The questions people actually ask
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