Niacinamide, Explained: What the Studies Support and What They Don't
The brightening evidence covers 5 percent, the sebum work covers 2 percent, and the label rarely tells you which study your bottle is leaning on.
Dietary Supplements
Skincare and haircare examined by formulation: which actives work at which concentrations, how long results take, and where topical treatment stops.
Niacinamide and Dark Spots: What the Clinical Trials Actually Show
Two vehicle-controlled trials measured pigment, not promises — here is what a decade of niacinamide research does and does not support.
Green Tea Extract and the Liver: Reviewing the Safety Reports Behind the Warning Labels
The NIH LiverTox database counts at least 100 published liver-injury cases linked to green tea extract, and Europe's food-safety agency flagged doses of 800 mg EGCG and above in 2018.
Iron Supplementation: When Ferritin Has Meaning, and Why the Dosage Advice Changed
A ferritin below 15 micrograms per liter defines deficiency by the WHO's 2020 guideline — and a 2017 study found taking iron every other day absorbs more than taking it daily.
Melatonin Doses in Supplements vs the Data: What 71% to 347% on the Label Means
Lab analyses found gummies and tablets ranging from 71 to 347 percent of their labeled melatonin content — while pediatric ingestions rose five-fold in a decade.
Third-Party Seals on Supplement Labels: What NSF, USP, and Informed Choice Actually Verify
The FDA does not approve supplements before sale — which makes the certification programs, and their very different scopes, the only outside check many products get.