HAVIT Blog

Science-backed guides on habits, sleep, nutrition, and movement.

LatestHistamine Intolerance Symptoms and Elimination Diet: A Complete Protocol for 2026Histamine intolerance requires systematic elimination plus DAO support—not random food avoidance—for lasting relief.

All articles

SIBO Breath Test Results: What Your Hydrogen and Methane Levels Actually Mean for Treatment

Your SIBO breath test pattern—hydrogen-dominant, methane-dominant, or mixed—determines which dietary and treatment approaches will actually work for your gut.

Grip Strength Predicts Mortality Better Than Blood Pressure: Training Guide by Age

Your handgrip strength is one of the strongest predictors of how long you'll live—and unlike genetics, you can actually train it.

Body Recomposition: How to Lose Fat and Gain Muscle at the Same Time in 2026

Body recomposition is real and works best for beginners, returners, and people with higher body fat—built on resistance training, about 1.6-2.2 g/kg of protein, a moderate deficit, and enough sleep.

Taking Thyroid Medication Levothyroxine with GLP-1: The Timing Protocol That Actually Works

GLP-1 drugs slow gastric emptying (by about 36 minutes on average in scintigraphy studies), which can make levothyroxine absorption less predictable—take it 60+ minutes before food and expect closer TSH monitoring when starting or adjusting a GLP-1.

Tart Cherry Juice for Sleep: What the Research Says About Dose and Timing

Small trials suggest tart cherry juice can modestly improve sleep—one study of 8 older adults with insomnia found 84 extra minutes using 240 ml twice daily—but no study shows a specific 90-minute window matters, and the evidence is still limited.

Blood Pressure Variability Day to Day: What's Normal and When to Worry

Blood pressure naturally rises and falls through the day. What matters most is your average over several days of home readings (hypertension starts at 135/85 mmHg at home) and the pattern—night-time dipping, morning surges and long-term variability.

Magnesium Glycinate vs Threonate for Sleep: Which Form Actually Crosses Your Blood-Brain Barrier?

Magnesium threonate crosses the blood-brain barrier more efficiently, but glycinate's GABA-enhancing glycine may produce faster sleep onset for most people.