Prevention & Screening

The checks worth having at every age, vaccines for adults, and how to catch things while they are still small.

A clear answer to "what should I actually be getting tested for?"

The in-depth guides

Biological Age Tests: What They Measure and What They Miss

Epigenetic clocks, telomere kits and questionnaire calculators all claim to give your real age. What each one measures, how far apart they disagree, and what to do instead.

8 min read· In depth

Colonoscopy: What to Expect, Step by Step

A doctor walks through colonoscopy honestly: the prep, sedation choices, the day itself, what polyp results mean, and how stool tests compare.

13 min read· In depth

Grip Strength and Muscle After 50: What the Numbers Mean

Grip strength predicts more than hand power. A band table by age and sex, three tests you can do at home, and what actually rebuilds muscle after 50.

9 min read· In depth

Heart Rate Variability: What Your Watch Is Really Telling You

HRV bands by age, why your number is not comparable to anyone else's, what actually moves it, and the handful of situations where a falling HRV matters medically.

8 min read· In depth

How Many Steps a Day Do You Actually Need?

A doctor explains what the step studies really show: where the benefit starts, where it plateaus, why 10,000 was marketing, and the number for your age.

9 min read· In depth

How to Live Longer: What Actually Works

The honest longevity guide: the handful of habits with real evidence for a longer, sharper life, what the expensive biohacking gets wrong, and where to start today.

9 min read· In depth

Testicular Lumps: What to Check For, and What They Usually Are

A doctor explains how to check your own testicles, what the common harmless lumps are, and which findings need seeing this week.

9 min read· In depth

The Shingles Vaccine, Explained

A doctor explains what shingles does, why risk climbs after 50, how well the two-dose vaccine works, its honest side effects, and who should ask for it.

12 min read· In depth

VO2 Max by Age: What Is a Good Number?

What VO2 max means, a band table by age and sex, how accurate the number on your watch really is, and how much of it you can actually change.

9 min read· In depth

What Health Checkup Do You Need at 25, 35, 45 and 55?

A doctor's guide to which health checks are worth doing at 25, 35, 45 and 55, what to skip, and how screening advice differs between countries.

13 min read· In depth

Quick answers

Short, specific answers to the questions people actually type. Each one links back to the full guide.

A Doctor's Travel Health ChecklistA doctor sets out what to sort before traveling: vaccines, malaria advice, medicines and documentation, insurance, and the risks that actually cause problems.Adult Vaccines You Might Be MissingA doctor explains which vaccines adults often miss, how schedules differ between the UK, US, EU, Gulf and South Asia, and how to check what you have had.Bone Density Scans: Who Actually Needs One?A doctor explains what a DXA bone density scan measures, who really needs one, how T-scores are interpreted, and why fracture risk matters more than density.Bowel Cancer Screening: Who, When and WhyA doctor explains how stool-based bowel cancer screening works, how ages differ between countries, what a positive result means, and why colonoscopy follows.Cervical Screening, Explained SimplyA doctor explains what cervical screening tests for, why HPV testing changed the intervals, how programs differ by country, and what an abnormal result means.Checking Your Skin: Which Mole Changes MatterA doctor explains which mole changes are worth acting on, how the ABCDE and ugly duckling rules work, and why skin screening programs differ by country.How Often Should You Have an Eye Test?A doctor explains how often adults need an eye test, why intervals differ by country and health condition, and which symptoms mean going sooner or urgently.How to Get More Out of a Ten-Minute AppointmentA doctor explains how to prepare for a short consultation: the details that matter most, and the three questions worth asking before you leave the room.Is There Really a Link Between Gums and Heart Disease?A doctor explains what the evidence really shows about gum disease and heart risk, how much of it is shared causes, and why treating your gums still matters.When Should You Start Checking Your Blood Pressure?A doctor explains what age to begin blood pressure checks, how often to repeat them, how national guidance differs, and how to measure properly at home.

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