Men this age don't test until something's obviously wrong. Fair enough. But what turns up at 22 is almost never dramatic, which is exactly why it sits there for years.

What Usually Turns Up

Vitamin D and B12. Both common, both boring, both responsible for a lot of the tiredness and brain fog people blame on workload or gaming till 2am. Fix either one and you notice within a couple of months.

The other thing is that this is when habits start leaving a paper trail. Late nights, drinking, protein powders, eating whatever's open at 11pm. It shows in liver enzymes and cholesterol long before it shows anywhere else. Right now it's reversible. It doesn't stay that way forever.

Who Should Consider These Tests

• You're tired or foggy even when you've slept

• You're vegetarian

• You take protein or bodybuilding supplements

• You drink regularly

• Diabetes or heart disease runs in the family

• You want a baseline before you start training seriously

What Each Test Tells You

This page lists 6 options. Here's what each one actually measures, so you can pick instead of guessing.

Blood tests

• Complete Blood Picture (CBP): Counts your red cells, white cells and platelets. It's the cheapest way to catch anaemia or an infection you didn't know you had, and it's the single most booked test we do.

• CRP test: Tells you there's inflammation somewhere. It won't tell you where, but it answers whether something's actually going on.

• Lipid Panel: Splits your cholesterol into the good, the bad and the triglycerides. High cholesterol has no symptoms at all, which is exactly the problem.

• Liver Function Test (LFT): Your liver handles everything you eat, drink and swallow. It puts up with a lot before it complains, so this picks up fatty liver or alcohol strain years before you'd feel anything.

• Vitamin B12 Test: Your nerves and red blood cells need B12. If you're vegetarian, you're at real risk, and the symptoms are easy to miss: tingling hands, fuzzy thinking, no energy.

• Vitamin D (25 - Hydroxy Vitamin D, Serum): Your body makes this from sunlight, and most people who work indoors don't get enough. Low levels show up as aching bones, weak muscles and flat mood.

How to Prepare

• No fasting: CRP test, Complete Blood Picture (CBP), Vitamin D (25 - Hydroxy Vitamin D, Serum)

• 9 to 12 hours fasting. Water's fine: Lipid Panel

• Skip alcohol for 24 hours first: Liver Function Test (LFT)

• No fasting. Ask your doctor before pausing supplements: Vitamin B12 Test

Tell the collection team everything you're taking, prescription or not. Plenty of supplements move these numbers, and without that context your report reads wrong.

How Often to Repeat

Once a year is enough if you're symptom-free. Twice if your liver enzymes or cholesterol came back high, or while you're on a supplement cycle.

Understanding Your Results

Slightly raised liver enzymes at this age are common and usually temporary. Alcohol does it, supplements do it, so does a recent viral fever. Your doctor will almost certainly repeat the test before doing anything about it.

These tests point at a diagnosis. They don't make one. Read your report with a doctor who knows your history and what you're currently taking.