Family Physician · Writer · Singapore

Evidence-based medicine,
explained honestly.

Dr Samuel Choudhury is a Singapore family physician. He writes about sleep, longevity, nutrition, vaccines, skin, mental health, and the questions patients actually ask — the kind you'd Google at 2am. No jargon, no hype, no sales pitch.

Read the writing About Dr Sam

MBBS (NUS, Dean's List) · MPH (Johns Hopkins) · GDFM · GDFP Derm

Dr Samuel Choudhury

As featured in

In the media

PEAK Singapore · Wellness · Opinion ·

At this longevity clinic, doctors rethink when healthcare should actually begin

By Dr Samuel Ravi Choudhury & Dr Sarah Lu

This is the pragmatic philosophy of Dr Samuel Ravi Choudhury, a physician leader who views the burgeoning field of longevity not as a search for a fountain of youth, but as a rigorous engineering challenge. In a world obsessed with "biohacking" and luxury wellness retreats, Dr Choudhury and his colleague, Dr Sarah Lu, managing director, Singapore Healthcare, are attempting to ground the conversation in clinical reality at Raffles HealthyLongevity, a specialised centre within the Raffles Medical Group in Singapore that focuses on extending the human healthspan through evidence-based intervention.

Read the full opinion piece in The Peak Singapore →

Independent opinion piece. Earned media, not sponsored or paid.

What I write about

I cover the full range of what walks into a family doctor's clinic — not just one specialty. The common thread is this: most health advice on social media is confusing, wrong, or trying to sell you something. My job is to translate the peer-reviewed evidence into plain English, and to be honest when the evidence is less clear than the headlines suggest.

Longevity & biological age

What VO2max, DXA, FibroScan and DNA methylation clocks actually tell you. Which tests are worth it, which are hype.

Sleep & circadian health

Why sleep is the most underrated longevity tool. What happens in each stage. Why weekend catch-up doesn't quite work.

Nutrition & gut health

Ultra-processed food, the blue zone microbiome, fermented foods, protein, fibre. What the research actually shows.

Cardiovascular & metabolic

ApoB, Lp(a), fasting insulin, the real risk calculators. Beyond cholesterol 101.

Vaccines & infection

Shingles and dementia, HPV in midlife, influenza, COVID boosters. What's current and what's overdue.

Everyday medicine

Skin, vitamin D, women's health, children's health, men's health, sexual health, mental health. The bread and butter of family practice.

Myth-busting viral health

Cortisol face, adrenal fatigue, the latest TikTok wellness fad. Separating the real from the noise.

Lifestyle medicine

Zone 2 cardio, resistance training, stress, sauna, cold exposure. The interventions with actual RCT evidence.

Recent writing

All articles →
Glucose · Exercise

Walk 10 Minutes After Your Hawker Meal. It Beats a 30-Minute Morning Jog.

A short post-meal walk flattens your glucose curve better than one long morning workout. A Singapore doctor explains why this matters after char kway teow, chicken rice or nasi lemak.

Creatine · Brain Health

Creatine Isn't Just for Bodybuilders. Your Brain Wants It Too.

Creatine has quietly become one of the most evidence-based longevity supplements in 2026. A Singapore doctor unpacks the evidence for muscle, cognition, sleep and menopause.

Stress · Cortisol

Cortisol Face Is Mostly a Myth. Chronic Stress Isn't.

TikTok's cortisol face and cortisol cocktail trends are medically misleading. Chronic stress, however, is linked to a 40 to 60 percent increase in heart disease risk.

Who this is for

If you're the kind of person who reads the abstract before the headline, you'll probably feel at home here. I write for busy professionals, worried parents, sandwich-generation adults caring for elderly parents, and anyone tired of health content that either scares them or sells to them. You don't need a medical background. You do need patience for nuance.

I'll rarely tell you what to do. I'll show you what the evidence says, what I'd do in your position, and where honest doctors still disagree.