HAVIT Blog

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

LatestBest Calorie Counter Apps in 2026 (Free and Paid): Every Major App, Reviewed One by OneEvery number in a calorie app is an estimate, so choose on consistency rather than claimed accuracy. Data provenance matters more than database size — and check what happens after the number.

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IBS FODMAP Reintroduction Phase Step by Step: Your Complete 2026 Challenge Protocol

The FODMAP reintroduction phase tests one food group at a time over 3 days, with 3-day washouts between challenges, to pinpoint your exact triggers while safely expanding your diet.

Altitude Sickness Prevention: The Science of Gradual Ascent and Hydration Above 2500m

Above 3,000 m, raise your sleeping elevation by no more than 500 m per day and take a rest day every 3-4 days; stay adequately hydrated, but drinking extra water hasn't been shown to prevent altitude sickness.

Earthing Research Under the Microscope: What 47 Studies Actually Tell Us About Grounding Claims

Grounding research shows interesting signals but suffers from tiny samples, poor blinding, and researcher conflicts—the science isn't settled yet.

Peripheral Neuropathy: Catching the Whispers Before They Become Screams

Peripheral neuropathy often gives early warning signs, and finding and treating its cause—blood sugar, vitamin B12 deficiency, alcohol and more—offers the best chance to slow it.

Protein Leverage Hypothesis: Why Your Body Forces You to Overeat Until Protein Needs Are Met

When the protein share of a diet drops, people tend to eat more total calories as appetite seeks protein; prioritizing protein-dense foods may help curb overeating, though effects vary between studies and people.

Heat Shock Protein Activation: The Science of Sauna Hyperthermic Conditioning Protocols

Heat exposure raises heat shock proteins in humans, and animal and local-heating studies suggest they help protect muscle during disuse—but there is no proven sauna temperature-and-time formula, and safety comes first.

Tingling Hands and Feet But Not Diabetic? 12 Surprising Causes of Peripheral Neuropathy

Diabetes is the most common known cause of peripheral neuropathy, but B12 deficiency, thyroid disease, autoimmune conditions, kidney disease, medications and toxins are important—and often treatable—causes worth testing for.

Cortisol Awakening Response: How Your First 30 Minutes Shape Your Entire Day's Stress

The cortisol awakening response (CAR) is a 50-75% cortisol rise in your first 30 minutes awake. It's linked to how your body handles stress, and morning habits like light exposure can influence it.

Post-Meal Glucose Spikes in Non-Diabetics: What 140 vs 160 mg/dL Actually Means for Your CGM Data

In healthy adults, glucose stays between 70-140 mg/dL most of the day and brief post-meal rises above 140 are common; occasional readings up to 160 mg/dL aren't cause for alarm on their own—patterns and recovery time matter more than single peaks.

Can Semaglutide Cause Depression or Anxiety? What Brain Science Actually Shows in 2026

Large trials and cohort studies have not shown that GLP-1 medications raise the risk of depression or suicidal thoughts on average, but the evidence is mixed and individual responses vary—so keeping an eye on mood is still sensible.

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.

Desk Stretches for Hip Flexor Tightness: A Sitting-All-Day Survival Guide

Seven targeted stretches you can do at your desk to counteract the specific muscle shortening patterns caused by sitting 6+ hours daily.