OPA Nutrition Blog
Plain-English guides to CoQ10, magnesium, gut health, sleep, blood sugar and more: what the research says and how to choose the right supplement.
170 articles
A plain-English, research-based guide to exercise and longevity: why fitness (VO2 max) and strength track with longer life, how much exercise the big studies point to, where Zone 2 fits, daily steps, training after 65, and a sample week.
A plain-English guide to sleep and aging: how sleep changes after midlife, how much older adults need, what the research says about sleep and longevity, the habits that help, and what to check on a sleep supplement label.
A plain-English guide to biological age: how it differs from chronological age, how epigenetic clocks from Horvath to DunedinPACE work, how accurate consumer tests are, where AI fits, and what the CALERIE trial found.
A line-by-line guide to the Supplement Facts panel: serving size, servings per container, amount per serving, plant part, %DV, "Daily Value not established" and other ingredients, using the real OPA Resveratrol 600 mg label as the worked example.
A plain-English guide to healthspan and lifespan: how each is defined and measured, how big the gap is in the US and worldwide, the 12 hallmarks of aging, and what official guidance says actually helps.
A plain-English guide to sirtuins: what SIRT1 to SIRT7 do, how NAD+ fits in, where the resveratrol story went wrong, and what has actually been shown in people.
