HAVIT Blog
Guides fondés sur la science pour les habitudes, le sommeil, la nutrition et le mouvement.
Récents · 110 articles
Why Your Thyroid Levels Keep Changing Even Though You Take the Same Pill Every Day
Coffee timing, gut bacteria, seasonal changes, and even your breakfast can swing TSH levels by 30-60% without touching your medication dose.
Thyroid Function Optimization Without Hormone Replacement: What Actually Works in 2026
Targeted selenium, zinc, and lifestyle modifications can normalize TSH in 30-40% of subclinical hypothyroidism cases, potentially delaying or avoiding medication.
Subclinical Hypothyroidism: When TSH Hits 6 or 8, Should You Actually Treat It?
Most people with TSH under 10 and no symptoms don't benefit from levothyroxine—but age, antibodies, and symptom patterns change the calculus significantly.
Tinnitus Sound Therapy and Habituation: What 47 Studies Actually Show About Rewiring Your Brain
Sound therapy can reduce tinnitus distress by 40-60% in most people, but it takes 6-18 months of consistent use and works by changing your brain's reaction, not eliminating the sound.
Tinnitus Habituation Therapy: How Sound Treatment Rewires Your Brain to Silence the Ringing
Structured sound therapy exploits brain plasticity to reclassify tinnitus as background noise, with most patients achieving significant relief within 6-18 months.
High Uric Acid Isn't Just About Gout: The Heart and Metabolism Connection You're Missing
High uric acid silently damages your cardiovascular system and metabolism—here's how to manage it beyond just preventing gout attacks.
What Vitamin D Level Actually Protects Your Immune System? The 2025 Research Changes Everything
Recent research suggests 40-60 ng/mL vitamin D levels optimize immune cell function, significantly higher than the traditional 30 ng/mL threshold.
Vitamin D Optimal Levels: How to Calculate Your Personal Supplementation Dose in 2026
Your optimal vitamin D dose depends on your starting level, body weight, and absorption factors—generic 1000 IU recommendations miss the mark for most people.
Optimal Vitamin D Blood Levels by Health Condition: 2026 Evidence-Based Targets
The 'optimal' vitamin D level isn't one number—it ranges from 30 ng/mL for basic bone health to 50+ ng/mL for autoimmune and mood conditions.
Vitamin D Toxicity: What 50,000 IU Daily Actually Does to Your Body
Vitamin D toxicity is rare but real—most cases involve doses above 50,000 IU daily for months, causing dangerous calcium buildup that damages kidneys.
Vulvodynia and Your Pelvic Floor: Why Muscle Tension Might Be the Missing Piece
Up to 90% of vulvodynia patients show pelvic floor hypertonicity—addressing muscle dysfunction through physical therapy and multimodal treatment significantly improves outcomes.
Heart Rate Pacing for Chronic Fatigue Syndrome: The Energy Envelope Strategy That Actually Works
Staying below your anaerobic threshold (typically 55-60% max heart rate) prevents post-exertional malaise and can expand your functional capacity by 15-23% over six months.