The research behind the label

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Plain amber supplement bottles and yellow capsules beside a dish of dried barberries on a cream linen cloth

Science Explained 13 min read

“Nature’s Ozempic”? What GLP-1 Supplements Can and Can’t Do

Berberine and other “GLP-1 boosters” promise Ozempic-like results. We compare the trial data with the real drugs and explain who should avoid these supplements.

Nutrition Reviews Editorial Team · Oct 5, 2026

Unlabeled jar of white collagen powder with a wooden scoop beside a glass of water on a stone countertop

Science Explained 10 min read

Collagen Supplements: What the Evidence Says for Skin, Joints, and Hair

Collagen has dozens of trials behind it, but much of the research is industry-funded. What holds up for skin, joints and hair, plus the doses studies used.

Nutrition Reviews Editorial Team · Sep 28, 2026

Shaker bottle with a pink-red drink next to sliced beetroot, a cup of black coffee and dumbbells on a gym bench

Science Explained 9 min read

Pre-Workout Ingredients That Work (and the Ones That Don't)

Caffeine dosing by body weight, plus what research says about creatine, beta-alanine, citrulline, nitrates, tyrosine, proprietary blends and stimulant safety.

Nutrition Reviews Editorial Team · Sep 28, 2026

Three small glass bowls of pale protein powder in slightly different shades beside a metal scoop and a glass of protein shake

Science Explained 9 min read

Whey Isolate vs. Concentrate vs. Hydrolysate: What Actually Matters

Protein %, lactose, leucine, digestion speed and cost per 25 g of protein: what separates whey concentrate, isolate and hydrolysate, and how to spot spiked labels.

Nutrition Reviews Editorial Team · Sep 28, 2026