Author: Mukul Mittal
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Carb Cycling: Does It Actually Work? A CGM Reality Check
Dr. Mukul Mittal walks you through carb cycling — what the evidence shows for endurance athletes, why it rarely helps general dieters, and what a CGM typically reveals on high-carb vs low-carb days.
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Parasympathetic vs Sympathetic: Activate Your Body’s “Rest & Digest” Mode
Dr. Mukul Mittal, Medical Director at Ultrahuman, walks you through how to look at the parasympathetic (“rest and digest”) and sympathetic (“fight or flight”) branches — with Ring AIR data from 320,000 users on the day-to-night heart-rate drop.
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What Does the Luteal Phase Feel Like? A Guide to Symptoms, Mood, and Training
We look at what the luteal phase actually feels like. Dr. Mukul Mittal, Medical Director at Ultrahuman, walks through symptoms, mood, sleep changes, when to talk to a clinician, and how to train with the pattern
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A1C Calculator: What Your Number Really Means
What does your A1C number actually mean? Dr. Mukul Mittal, Medical Director at Ultrahuman, walks through the A1C-to-glucose conversion chart, where the test misleads, and how CGM Time-in-Range fills the gap A1C alone can’t capture.
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Sleeping Heart Rate by Age: 532,000 Ring Users’ Nightly Data Compared
What’s a typical sleeping heart rate by age? Ultrahuman analyzed 532,000 Ring AIR users across 78 million nights — and the result challenges a popular assumption. Dr. Mukul Mittal walks through the data.
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Why Is My Period Late? Eight Non-Pregnancy Reasons
This article was medically reviewed by Kate Davies RN, BSc (Hons), FP Cert, Vice President Medical Women’s Health & Longevity at Ultrahuman. A late period without pregnancy is common — stress, thyroid issues, hormonal disorders, perimenopause, and rapid lifestyle changes all routinely shift cycle length by days to weeks. Understanding which non-pregnancy cause is most…
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Is Chick-fil-A Healthy? A Nutrition Guide to Every Menu Item
Is Chick-fil-A healthy? Most online guides focus on calorie count alone, but Mukul Mittal, Medical Director at Ultrahuman, walks through every menu category — breakfast, sandwiches, sides, salads, drinks — with the official Chick-fil-A nutrition numbers and the glucose-stability picks that follow from them.
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Glutathione Benefits: The Master Antioxidant Explained
Glutathione benefits are real — but most oral supplements aren’t. Mukul Mittal, Medical Director at Ultrahuman, walks through the evidence-backed benefits, the foods that actually raise it, and which precursor supplements (NAC, cysteine, glycine) have the strongest evidence behind them – plus where the supplement industry overstates what oral pills can do.
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Period Symptoms — What’s Normal and What’s Concerning
Most period symptoms are normal – but some signal an underlying condition. Mukul Mittal, Medical Director at Ultrahuman, walks through what’s typical, when cramps cross the line, and when to see a clinician.