Probiotic Strains, Explained: Which Claims Have Trial Evidence Behind Them
The strongest data sits in antibiotic-associated diarrhea; the weakest sits in the broad immune and mood claims printed across the rest of the shelf.
Dietary Supplements
Skincare and haircare examined by formulation: which actives work at which concentrations, how long results take, and where topical treatment stops.
Collagen Supplements and Skin: What the Clinical Trials Measured, and Who Paid for Them
A 2021 meta-analysis of 19 trials found measurable gains in hydration and elasticity — but nearly every trial tested a manufacturer's own peptide powder for eight to twelve weeks.
Omega-3 Supplements and the Heart: What the Largest Trials Actually Found
VITAL, REDUCE-IT, and STRENGTH enrolled more than 40,000 people between them — and their verdicts on fish-oil capsules diverged in ways that matter on both sides of the pharmacy counter.
Ashwagandha and Stress: What the Randomized Trials Support, and Where the Regulators Object
The adaptogen's trial record is real but small and extract-specific — and a 2023 regulatory suspension in Denmark put liver safety on the label discussion.
Vitamin D Dosing, Updated: What the Large Trials Changed About How Much Is Enough
The 600-IU baseline survived a decade of challenges; the Endocrine Society's 2024 guideline and the VITAL trial rewrote the case for testing and for high doses.
Magnesium Supplement Forms, Compared: What the Bioavailability Data Actually Shows
Citrate, glycinate, oxide — the label chemistry decoded, with the absorption studies behind the rankings and the claims that outpace them.