Celebrity Fad Diets: A Guide to the Stars' Eating Habits and the Evidence
Why celebrity fad diets appeal, how the Master Cleanse, grapefruit, low-carb and fasting plans compare with research, and the red flags to watch for.
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.
167 articles
Uncovering the Truth About Faddy Diets: What the Evidence Says
How to spot a fad diet with FTC and NIH red flags, what trials found for popular diets, and why sticking with a plan matters more than its name.
African Mango Side Effects: A Research-Based Guide
Side effects reported in African mango trials, drops vs pills, caffeine, a 2015 case report, quality concerns, and who should check with a doctor first.
Benefits of Biotin: What It Does and What the Evidence Shows
What biotin (vitamin B7) does, how much you need, the best food sources, what research really shows for hair and nails, and why it can affect lab tests.
Anti-Bloating Diet Guide: Foods That Can Cause Bloating and What Helps
Which foods commonly cause bloating, what feeding trials show about sodium, fiber and fluids, habits that reduce swallowed air, and when to see a doctor.
Zinc and Prostate Health: What Research Shows
Why the prostate holds so much zinc, what research does and does not show, the 11 mg RDA and 40 mg upper limit, copper balance, forms and interactions.
How to Increase a Woman's Libido Naturally
How sleep, stress, exercise, alcohol and relationships relate to women's desire, and what the small studies show for maca, tribulus, ashwagandha and ginseng.
Turmeric Side Effects: Separating Fact from Fiction
Known turmeric side effects, from stomach upset and skin reactions to rare liver injury, plus black pepper, medication, gallbladder and pregnancy cautions.
CoQ10 and Fertility: What the Research Shows
What small trials found on CoQ10 and egg and sperm quality, how Cochrane rates the evidence, the doses studied, and folic acid before conception.
Nighttime Supplements, Sleep and Metabolism: A Guide
How sleep affects appetite and metabolism, what nighttime fat burners contain, why caffeine and green coffee belong earlier in the day, and safety notes.
Digestive Enzyme Supplements: What They Are and What Evidence Shows
An evidence-based guide to digestive enzyme supplements: enzyme types, lactase and alpha-galactosidase research, enzyme blends and who should ask a clinician.