Apigenin: Chamomile, Parsley, NAD+ and What the Research Shows
Apigenin is a flavone in chamomile, parsley and celery. Which foods have the most, what the CD38 and NAD+ research found in mice, what chamomile sleep studies show and safety notes.
OPA Nutrition Blog
Supplement & Wellness Guides
Plain-English guides to CoQ10, magnesium, gut health, sleep, blood sugar and more: what the research says and how to choose the right supplement.
187 articles
Telomeres and Aging: What They Are and What Affects Their Length
Telomeres are the protective caps on your chromosomes. What they are, why they shorten as cells divide, what a telomere length test can and can't tell you, and which habits studies link to longer telomeres.
Sulforaphane: Broccoli Sprouts, Food Sources and What the Research Shows
Sulforaphane forms when you chop or chew broccoli. Why broccoli sprouts have far more, how cooking and mustard change what you absorb, and what human studies show.
Taurine: What It Is, Food Sources and What Aging Research Shows
Taurine extended lifespan in mice, but newer studies question whether it drops with age in people. Food sources, what the research shows and safe amounts.
Alpha-Ketoglutarate (AKG): What It Is and What Aging Research Shows
Alpha-ketoglutarate (AKG) extended lifespan in worms and female mice. What the human studies show so far, the ABLE trial dose, and how AKG differs from AAKG.
GlyNAC Explained: Glycine and NAC for Healthy Aging
GlyNAC pairs glycine with NAC, two building blocks of glutathione. What the Baylor trials in older adults measured, the doses they used, side effects and what is still unknown.
Ergothioneine: The Mushroom Compound Researchers Are Watching
What ergothioneine is, which mushrooms have the most, why the body keeps a transporter just for it, and what human studies have and have not shown so far.
Pterostilbene vs Resveratrol: How They Compare
Pterostilbene and resveratrol are closely related plant compounds. Here is how their structure and absorption differ, where each is found in food, and what the small human trials found.
Spermidine Foods: Where to Find It and What Studies Show
Which foods contain the most spermidine, from wheat germ and soybeans to mushrooms and aged cheese, and what animal and human studies have and have not shown.
Astaxanthin: What It Is and What the Research Says
What astaxanthin is, which seafood has the most, what small human trials on skin, eyes and muscle found, typical doses and safety, and why the mouse lifespan result did not repeat.
Urolithin A: What It Is, Pomegranates and the Gut Link
An honest guide to urolithin A: how gut bacteria make it from ellagitannins in pomegranates, walnuts and berries, why many people make little or none, what the small human trials did and didn't find, and who funded them.
Resveratrol Foods vs Supplements: How Much Is Really in Grapes, Berries and Wine?
Measured resveratrol amounts in red grapes, berries, peanuts, cocoa and red wine, how much people really get from food, how that compares with a supplement capsule, and why supplement makers use Japanese knotweed root.