FYXLIFE Knowledge Center
Insights on longevity, nutrition, fitness, sleep, and living well — backed by your data.
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The Cortisol Cascade: Stress, Sleep & Metabolism
Doing everything right but still exhausted? Chronic stress triggers a cortisol cascade that breaks down sleep, energy, and metabolism. Here’s…
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VO2 Max Training: What the Research Really Shows
New meta-analyses quantify exactly how much training raises VO2 max — and why your response may differ. What the evidence…
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APOE4 Gene Test: Is It Worth Testing for Alzheimer’s Risk?
Carrying APOE4 raises Alzheimer’s risk — but does knowing change anything? Evidence-based verdict on whether APOE4 testing is worth it…
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Thyroid and Mood: What New Research Reveals
Brain fog, flat mood, and memory issues may trace back to thyroid function — even when your TSH looks ‘normal’.…
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CoQ10 and Your Mitochondria: What It Actually Does Inside Your Cells (And Whether It’s Worth Taking)
You’ve heard of CoQ10 but do you know what it actually does inside your cells? Here’s the real mechanism —…
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The Muscle Testing Stack: What to Measure, When to Test, and How to Interpret Your Results
Still guessing whether your muscle mass is actually improving? Here’s exactly what to test, when to test it, and how…
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The Emotional Cascade: How Chronic Stress Quietly Dismantles Your Brain, Heart, and Immune System
Chronic stress doesn’t stay in your head. See how emotional strain cascades into brain, heart, and immune damage — and…
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The Inherited Heart Risk Your Standard Cholesterol Test Completely Misses: What New Lp(a) Research Reveals
Your cholesterol looks fine — but Lp(a) could be quietly tripling your heart risk. New research explains why this genetic…
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Why Protein Is the Only Nutrient Your Muscles Cannot Survive Without
Still eating the same protein you did at 25? After 35, your muscles need more — and the standard guidelines…