Blood testing basics 6 min read
How to prepare for a blood test
Clear, practical preparation advice—from fasting and medication to hydration and appointment-day nerves.
Jace health guides
Health guides, without the noise.
Practical guides to help you understand a health concern, compare your options and know when to speak to a healthcare professional.
- Written by Dr John T. Doherty, consultant doctor and founder of Jace Medical
- Based on NHS, NICE and UK professional guidance, with sources listed in every guide
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Blood testing basics 7 min read
Choosing the right private blood test
How to choose a focused test that answers a real question—not simply the panel with the most markers.
Blood testing basics 6 min read
How often should you have a blood test?
There is no universal testing timetable. Here is what should determine when repeating a blood test is worthwhile.
Hormone health 8 min read
Female hormone testing: what blood tests can tell you
Hormone results depend on the question, the menstrual cycle and medication. Learn what testing can—and cannot—show.
Hormone health 7 min read
Menopause blood tests: when are they useful?
Menopause is often identified from age, cycle changes and symptoms—not a hormone panel. Here is when testing can help.
Hormone health 8 min read
PCOS blood tests: which tests do you need?
Blood tests can support a PCOS assessment, but diagnosis depends on symptoms, history and sometimes imaging too.
Hormone health 8 min read
Testosterone blood tests for men: timing and results
A reliable testosterone assessment is more than one number: symptoms, morning timing and repeat confirmation all matter.
Nutrition and metabolism 8 min read
Blood tests for nutritional deficiencies
Fatigue does not automatically mean a vitamin deficiency. Targeted testing should reflect symptoms, diet and risk.
Nutrition and metabolism 7 min read
Blood tests for diabetes and blood sugar
Understand how HbA1c and blood glucose tests are used for risk assessment, diagnosis and ongoing monitoring.
Weight management 7 min read
Prescription weight-loss medication: what to expect
Why prescription weight-management treatment starts with an individual clinical review—and what a safe programme around it should include.
Sexual health 7 min read
How soon after sex should you get an STI test?
Testing too early can miss an infection. Learn the common testing windows—and when symptoms or a recent exposure should not wait.
Driver medicals 7 min read
D4 and DLM1 driver medicals: what to expect
Which form do you need, what will be checked and what should you bring to an HGV or bus driver medical?
Workplace health 8 min read
Health surveillance at work: an employer’s guide
A practical introduction to risk-led workplace health surveillance, competent delivery, confidentiality and employer responsibilities.
Medical transport 8 min read
Medical repatriation: how does it work?
What families and case managers need to know when arranging a medically supported journey home from another country.
Health assessments 7 min read
What does a body composition analysis measure?
A body-composition reading can show more than weight—but hydration, preparation and trends all affect what the numbers mean.
These guides give general information. They don’t diagnose a condition or replace advice from a clinician who knows your history. If symptoms are severe, worsening or urgent, use the appropriate emergency or urgent care service.
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