Electrolyte Imbalance: The Athlete's Hidden Performance Killer
I used to think electrolyte issues were just about cramps. Then I saw athletes collapse mid-race. Here's what I learned...
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Beetroot Juice vs. Nitrate Pills: My Reversal on What Actually Works
I used to push beet juice on every athlete—until the research made me switch. Here's what actually improves blood flow a...
NAC for Cold Weather Athletes: My 12-Year Take on Respiratory Protection
Is NAC worth it for winter training? A CSCS breaks down the research, dosing, and real-world results for athletes battli...
Shilajit for Athletes: My Mineral Replenishment Reversal
I used to dismiss shilajit as hype. New research on its fulvic acid and minerals changed my mind for athlete recovery. H...
Reishi Mushroom for Athletes: Immune Modulation in Periodized Training
I was skeptical about reishi for athletes—until I saw the research. Here's how to time reishi supplementation across tra...
Why I Stopped Pushing Probiotics and Started with Prebiotic Fiber for Athletes
I used to recommend probiotics to every athlete—until gut microbiome research shifted. Here’s how prebiotic fiber timing...
Phosphatidylserine for Athletes: The Cortisol Reset You're Missing
Tired of burnout? Sports nutritionist Rachel Kim explains how phosphatidylserine manages cortisol, reduces overtraining...
Vitamin D's Hidden Role in Athletic Performance: More Than Just Bones
That claim about vitamin D only mattering for bones? It's based on outdated thinking. Here's how it actually powers musc...
Glutamine for Athletes: Gut Barrier Savior or Overhyped?
Does glutamine really protect your gut during intense training? A CSCS breaks down the science, dosing, and who should s...
Protein's Hidden Role in Cramp Prevention: Beyond Electrolytes
Think cramps are just about electrolytes? Research shows protein and specific amino acids play crucial roles in muscle f...
Glycine: The Amino Acid That Powers Your Day & Calms Your Night
Can one amino acid boost daytime energy AND improve sleep? Sports nutritionist Rachel Kim breaks down glycine's dual rol...
Vitamin D for Athletes: Sunlight vs. Supplements—What Actually Works?
After 9 years working with endurance athletes, I'll show you whether sunlight or supplements is better for vitamin D lev...