The research behind the label

Evidence-based guides written by our editorial team — every claim sourced, every study linked.

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Small ceramic bowl of white creatine powder with a metal measuring scoop and a glass of water on a pale stone countertop

Guides 10 min read

Creatine Monohydrate: The Evidence-Based Guide (2026)

How much creatine to take for your weight, whether to load, and what research says about water weight, hair loss, kidneys, the brain and pricier forms.

Nutrition Reviews Editorial Team · Sep 28, 2026

A plain unlabeled bottled protein shake beside an open tub of protein powder with a scoop and shaker on a linen-covered table in soft morning light.

Buying Guides 15 min read

Ready-to-Drink Protein Shakes vs. Powder: Cost Per 30 g

How to calculate cost per 30 g of protein for bottles, sachets and tubs, what else is in a ready-to-drink shake, and whether UHT processing hurts protein.

Nutrition Reviews Editorial Team · Oct 17, 2026

Unlabeled silver can beside a scoop of pink powder and a green bowl of white tablets on sunlit beige fabric.

Buying Guides 14 min read

Pre-Workout vs. Energy Drink vs. Caffeine Pill: Dose, Cost and Safety

Pre-workout, an energy drink or a plain caffeine tablet: how the three compare on milligrams per serving, cost per 100 mg, extras, labelling and safety.

Nutrition Reviews Editorial Team · Oct 13, 2026

Unlabeled tub of protein powder with a scoop, a glass of shake, raw peas and cocoa powder on a cream linen surface in soft morning light.

Safety 14 min read

Lead in Protein Powder: What the Tests Found and What to Do

Consumer Reports found lead in most protein powders it tested. Here is what the thresholds really mean, why plant powders test higher, and how to cut exposure.

Nutrition Reviews Editorial Team · Oct 8, 2026

Three small unlabeled amber glass shot bottles on a cream linen surface in soft morning light, with a sprig of sage and generous empty space

Safety 11 min read

Tianeptine ("Gas Station Heroin"): Why the FDA Keeps Warning About This Fake Focus Supplement

Tianeptine is an unapproved opioid-acting drug sold as a nootropic in gas stations. What the FDA has warned, the names to watch for, and what to do if you bought one.

Nutrition Reviews Editorial Team · Oct 7, 2026

A clear, pale pink juice-like beverage in a simple glass next to a mound of fine white powder, set against a cream and linen background.

Ingredients 12 min read

Clear Whey Protein Explained: Does the "Juice-Like" Alternative Live Up to the Hype?

Clear whey is everywhere, swapping creamy textures for refreshing, juice-like drinks. We break down the science behind the filtration to see if it builds muscle just as well.

Nutrition Reviews Editorial Team · Oct 6, 2026

Two unlabeled clear glass apothecary jars resting on a soft linen napkin, one with golden capsules and one with white powder capsules, separated by a sprig of dried chamomile.

Guides 15 min read

Digestive Enzymes vs. Probiotics: Which Do You Need for Bloating?

Post-meal bloating is an incredibly common complaint. Learn the exact physiological difference between digestive enzymes and probiotics to finally resolve your gut issues.

Nutrition Reviews Editorial Team · Oct 5, 2026

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

Dried ashwagandha roots and a small bowl of root powder on a weathered wooden board

Ingredients 10 min read

Ashwagandha: Benefits, Risks, and What KSM-66 and Sensoril Mean

Ashwagandha has real trials for stress and sleep, rare but serious liver risks and growing regulatory scrutiny. What extract names mean and which doses were studied.

Nutrition Reviews Editorial Team · Sep 28, 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

Glasses of plain and lightly tinted water on a wooden table beside a small bowl of sea salt, a halved lemon and a banana.

Guides 10 min read

Electrolytes 101: Sodium, Potassium, and When You Actually Need Them

Most people don't need electrolyte powders, but some do. Learn how much sodium you lose in sweat, how oral rehydration works, and when a high-sodium mix makes sense.

Nutrition Reviews Editorial Team · Sep 28, 2026

A glass of green drink next to a bowl of green powder, frozen broccoli florets and fresh leafy greens on a stone countertop

Buying Guides 9 min read

Are Greens Powders Worth It? What the Research Actually Says

What's in greens powders, what the limited research shows, why blends and contaminant testing matter, how the cost compares with frozen vegetables, and who might benefit.

Nutrition Reviews Editorial Team · Sep 28, 2026

Overhead view of protein-rich foods including eggs, yogurt, lentils, tofu, salmon, chicken, almonds and edamame in ceramic dishes on a wooden table

Guides 10 min read

How Much Protein Do You Really Need? A Practical Guide by Goal

From the 0.8 g/kg RDA to the new 1.2–1.6 g/kg guideline: daily protein targets by goal, grams by body weight, per-meal timing, and advice for aging, dieting and vegans.

Nutrition Reviews Editorial Team · Sep 28, 2026

An amber supplement bottle with a blank label next to a magnifying glass, capsules and a notebook on a wooden table in soft daylight

Guides 12 min read

How to Read a Supplement Facts Label Like an Expert

Serving sizes, %DV vs. upper limits, ingredient forms, proprietary blends and claims: a step-by-step method for reading any Supplement Facts panel with confidence.

Nutrition Reviews Editorial Team · Sep 28, 2026

Three small ceramic dishes holding magnesium capsules, powder and tablets beside a glass of water, pumpkin seeds and almonds.

Ingredients 10 min read

Magnesium Glycinate vs. Citrate vs. L-Threonate: Which Form Is Right for You?

Glycinate, citrate or L-threonate? Compare elemental magnesium, absorption and gut effects, plus what research shows for sleep, anxiety, constipation and migraine.

Nutrition Reviews Editorial Team · Sep 28, 2026

Amber fish oil softgels in a glass dish beside a raw salmon fillet, a lemon wedge and a small vial of green algae oil.

Buying Guides 10 min read

Omega-3 Fish Oil: EPA, DHA, and How to Choose a Quality Supplement

Ignore the "1,000 mg fish oil" headline. Learn to read EPA + DHA per serving, choose the right form, spot oxidized oil, and dose safely for your goal.

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

Bowl of plain yogurt, a jar of sauerkraut and a few clear capsules on a light linen tablecloth

Guides 10 min read

Probiotics Explained: Strains, CFUs, and What the Evidence Actually Supports

Probiotic benefits depend on the exact strain and dose. How to read strain names and CFU claims, where the evidence is solid or mixed, and who should skip them.

Nutrition Reviews Editorial Team · Sep 28, 2026

Bedside table at dusk with a glass of water, a small dish of plain capsules and a softly glowing lamp

Guides 11 min read

Sleep Supplements Ranked by Evidence: Melatonin, Magnesium, Glycine and More

Which sleep supplements actually work? We rank melatonin, magnesium, L-theanine, glycine, valerian and tart cherry by evidence, with doses, timing and child safety.

Nutrition Reviews Editorial Team · Sep 28, 2026

Glass sample vials, a pipette and an unlabeled supplement bottle on a laboratory bench in cool daylight

Safety 9 min read

Third-Party Testing Explained: NSF vs. Informed Sport vs. USP

What USP, NSF and Informed Sport seals actually test, how to verify a certification in two minutes, how to read a certificate of analysis, and where testing stops.

Nutrition Reviews Editorial Team · Sep 28, 2026

A smartphone with a blank screen beside an unlabeled supplement tub, gummies and an opened shipping box on a kitchen counter

Safety 9 min read

Are TikTok Shop Supplements Legit? How to Vet Viral Products Before You Buy

How creator commissions work, what TikTok and the FTC require, where counterfeit and contamination risks hide, and a 10-minute checklist before you tap 'buy'.

Nutrition Reviews Editorial Team · Sep 28, 2026

Golden vitamin D softgels and an unlabeled dropper bottle beside a soft-boiled egg, fermented soybeans and salmon in warm sunlight.

Ingredients 11 min read

Vitamin D3 + K2: Dosage, Timing, and Who Should Supplement

How much vitamin D3 you need, when to take it, whether K2 (MK-7) adds anything, and who should test or skip it, based on the latest guidelines and trials.

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