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DNA test or blood test? Which hormone test do I need?

Different tests answer different questions, and sometimes the honest answer is your GP. Answer four questions and see which test, if any, answers yours.

1. What do you want to find out?
2. Do you use testosterone or anabolic steroids?
3. Do you have symptoms that worry you?
4. Have you had blood tests in the last six months?
What fits your question

Answer the four questions to see which test, if any, answers yours.

The short version

If you want to know…The test that answers it
Your testosterone or oestradiol todayA blood test (GP or private lab)
How your body is coping with steroidsBlood tests over time, plus blood pressure
Which hormone-related variants you carryA genetic test, once
Whether steroids are safe for youNo test can tell you this
Why you have symptomsYour GP

Questions

Should I get a DNA test or a blood test for my hormones?

It depends on the question. A blood test measures your hormone levels on the day, so it is the one for checking testosterone, oestradiol or how your body is coping with steroids. A DNA test reads variants you were born with, which researchers have studied in connection with hormones; it never changes, so you only need it once. Many people use both.

Can a DNA test measure my testosterone?

No. Only a blood test measures testosterone. A DNA test can read genetic variants that large studies have linked to higher or lower average testosterone or SHBG, but not your level.

I use steroids. Which test should come first?

A blood test, plus a blood pressure check. Published UK guidance suggests checking haematocrit, cholesterol, liver and kidney function and hormones before, during and after use. A genetic test adds background but doesn't replace monitoring.

Is any test free in the UK?

NHS blood tests are free when your GP orders them. Some needle and syringe programmes and steroid clinics offer free health checks. Genetic tests for hormone variants are not available on the NHS unless a specialist suspects a genetic condition.

For information only, not medical advice. GeneticEdge does not recommend or endorse anabolic steroid use, and no genetic test can tell you whether steroids are safe for you. Talk to a GP or pharmacist about your health. Last reviewed 30 October 2026.