Fitties Journal

Matched for daily protein, both build muscle about the same. Isolate suits strict dieting and lactose sensitivity; concentrate wins on value and taste.

Expect roughly 1-2kg in the first weeks, and it's water pulled into muscle cells, not fat. What's happening, how dosing changes it, and why it's fine.

L-theanine promotes calm without drowsiness. Research-backed doses (100-400mg by goal) and the 1:1 caffeine pairing that smooths the jittery edge.

Does creatine cause hair loss? There is no solid evidence it does. Where the myth started, what a 2025 trial found, and who should still be cautious.

Which hair, skin, and nails vitamins actually work? An honest look at biotin, silicon, collagen, vitamin C, and zinc, the hype to skip, and how to choose.

Creatine for women, explained: what it actually does, the bulking and water-weight myths, how much to take, and whether it's safe.

Whey vs plant protein: whey leads on leucine and fast absorption, but a complete pea and rice blend builds muscle just as well. Compare both and choose.

The one magnesium form shown to raise brain magnesium. What small but encouraging human trials show for memory and sleep, and the doses studies used.

Most supplement stacks are built on impulse, not strategy. This guide teaches a three-layer framework for choosing, combining, and timing your supplements. Then use the free Supplement Stack Builder to...

The most researched sports supplement deserves more than a vague label claim. Get a personalized creatine dosing protocol with our interactive calculator, plus the science on how creatine works and...

Protein builds. Carbs fuel. Fats regulate. This guide breaks down how each macronutrient works, how to balance them for your goals, and includes a free macro calculator to get your...

Almost every pre-workout is built from the same handful of ingredients. The difference is the dose. Here is what each one does, the amount the research actually uses, and the...

Berberine has been called everything from "nature's Ozempic" to a metabolic miracle. The clinical data tells a more interesting, more nuanced story. Here's what the research actually supports, who berberine...

Alcohol pauses fat burning, blunts muscle recovery, and fragments your sleep architecture. Here's exactly how it happens and what you can do about it without swearing off social drinking entirely.

Alcohol can slow protein synthesis, disrupt hormones, and compromise recovery. Here's what the research actually shows about alcohol and muscle growth, and how to manage it without giving up your...

Injury recovery demands more from your diet, not less. This guide covers the key nutrients, foods, and supplementation strategies that support tissue repair, muscle preservation, and a stronger return to...

Most pre-workout labels are designed to impress, not inform. Learn how to read the Supplement Facts panel, evaluate ingredient dosing, and separate real performance support from marketing noise.

Not all plant-based protein powders are created equal. Learn how to evaluate amino acid profiles, digestibility, sweetener quality, and micronutrient support to find a formula that actually performs.