Fitties Journal

Most athletes do not strictly need a multivitamin, and any brand that tells you otherwise is selling you fear. If your diet is genuinely dialed in, you can hit your...

Whey isolate and whey concentrate come from the same milk. The difference is how far each one is filtered. Whey concentrate is the less processed form, roughly 70 to 80%...

L-theanine is an amino acid found almost exclusively in tea leaves, and it is best known for one thing: it promotes a calm, relaxed state without making you drowsy. That...

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.

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.

Most magnesium never reaches your brain. The common forms, oxide and citrate, do useful work in the gut and muscles, but they barely move the needle on magnesium levels inside...

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...

Most pre-workouts lean on excessive caffeine and label theater. This guide breaks down which ingredients are backed by research, which are filler, and includes a free scorecard to rate your...

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...

Most weight loss advice is either oversimplified or overcomplicated. This guide covers the fundamentals that actually matter: caloric deficit, body composition, protein, sleep, stress, and smart supplementation. Built for people...

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.

Athletes who need to avoid gluten face unique fueling and supplement challenges. This guide covers who truly benefits from gluten avoidance, how to meet performance nutrition needs with gluten-free foods,...

Athletes with dietary restrictions face unique nutritional challenges that most guides ignore. Learn how to read supplement labels with precision, identify hidden allergens, and fill the gaps your restricted diet...

Antioxidants help protect cells from oxidative stress, but the supplement aisle offers dozens of options with vastly different mechanisms. This guide breaks down how each major antioxidant works, what the...

Probiotics are live beneficial microorganisms that support digestive health, immune function, and overall wellbeing. This guide covers how they work, which strains matter, how to select and take a quality...

The supplement industry generates tens of billions in revenue every year, and a staggering amount of that comes from people buying products they do not need based on claims that...