HAVIT Blog
Guides fondés sur la science pour les habitudes, le sommeil, la nutrition et le mouvement.
Récents · 30 articles
Best Herbal Tea for Hydration Before Bed: A Sleep-Friendly Ranking for 2026
Rooibos leads for hydration, chamomile wins for sleep onset, and passionflower excels at deep sleep—all without triggering nocturia when consumed 90+ minutes before bed.
The 1-2% Dehydration Threshold: When Your Brain Starts Losing Its Edge
Losing just 1-2% of body weight through dehydration triggers measurable drops in attention, working memory, and mood—often before you feel thirsty.
Why Your Skin Needs Water From the Inside: The Collagen-Hydration Connection
Internal hydration directly affects fibroblast function and collagen synthesis—something no topical product can replicate.
Hydrogen Water Benefits: What 47 Studies Actually Show (2026 Evidence Review)
Hydrogen water shows modest exercise recovery benefits in athletes, but anti-aging claims remain largely unsupported by quality research.
Kombucha's Hidden Math: How Fermentation Time Changes Sugar and Probiotics
Longer fermentation slashes sugar but kills some probiotics; the sweet spot is 10-14 days for balanced benefits.
Lemon Water Won't Change Your Body's pH—But Here's What It Actually Does
Your kidneys regulate blood pH within 7.35-7.45 regardless of what you drink, but lemon water offers legitimate benefits through vitamin C absorption and citrate's effects on kidney stone prevention.
Matcha vs Coffee for Sustained Energy: Why Your Afternoon Crash Might Be Optional
Matcha delivers caffeine more gradually thanks to L-theanine, creating 4-6 hour energy curves versus coffee's 2-3 hour spike, with nearly identical hydration effects.
Milk Beats Water for Hydration: What the Beverage Hydration Index Actually Shows
Studies show milk's protein and electrolyte content slows fluid loss, keeping you hydrated significantly longer than plain water.
The 30-Minute Morning Water Window: How Cortisol Timing Changes Everything
Drinking 500ml of water during your cortisol awakening response (15-45 minutes after waking) can boost metabolic rate by 24% and reduce morning fatigue by 41%.
Overhydration and Hyponatremia in Athletes: The Hidden Danger of Drinking Too Much Water
Drinking excessive water during endurance events dilutes blood sodium to dangerous levels—here's how athletes can hydrate smarter and stay safe.
Post-Sauna Rehydration and Electrolyte Replacement: A Complete Mineral Recovery Protocol for 2026
Different sauna types drain different minerals—Finnish saunas deplete more sodium while infrared sessions pull more potassium, requiring tailored rehydration strategies.
Pre-Workout Hydration Timing: The 5-7mL/kg Protocol That Actually Works
Drink 5-7mL/kg body weight 4 hours pre-workout and 3-5mL/kg 2 hours before—this ACSM protocol optimizes plasma volume while avoiding GI distress.