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The FitnessReviews blog

Supplement Science

Evidence-first explainers on what is actually in the scoop.

Supplement ScienceCreatine Monohydrate: The Complete, No-Hype Guide
Supplement Science9 min read

Creatine Monohydrate: The Complete, No-Hype Guide

Creatine is one of the most researched sports supplements on the shelf. Here's what it does, how to take it, what the side effects really are, and how to buy a good one.

Supplement ScienceElectrolytes Explained: Who Needs Them, and How Much Sodium Is Too Much?
Supplement Science8 min read

Electrolytes Explained: Who Needs Them, and How Much Sodium Is Too Much?

Electrolyte mixes range from 55 mg to 1,000 mg of sodium per serving. Here's who actually benefits, how to match a mix to your sweat, and when it's just extra salt.

Supplement ScienceHow to Read a Pre-Workout Label (and Spot an Underdosed Formula)
Supplement Science9 min read

How to Read a Pre-Workout Label (and Spot an Underdosed Formula)

Pre-workout labels are built to impress, not inform. Learn which ingredients matter, the doses research actually uses, and the simple math that exposes underdosed formulas.

Supplement ScienceThird-Party Testing Explained: NSF Certified for Sport, Informed Sport and More
Supplement Science8 min read

Third-Party Testing Explained: NSF Certified for Sport, Informed Sport and More

NSF, Informed Sport, Informed Choice, USP: what each supplement seal actually checks, what vague lab-tested claims miss, and how to verify a certification yourself.

Supplement ScienceWhey vs. Plant Protein: Which Should You Actually Buy?
Supplement Science8 min read

Whey vs. Plant Protein: Which Should You Actually Buy?

Both can build muscle. The right pick comes down to digestion, diet, taste, contaminant testing, and cost per gram of protein. Here's how to choose with confidence.