Cholesterol and LDL: what do the results mean and when do they need attention?

What total cholesterol, LDL, HDL and triglycerides show, why LDL targets are not identical for everyone, and which lifestyle measures genuinely matter.

Blood glucose and HbA1c: what do they show?

How fasting glucose and HbA1c differ, which thresholds are used for prediabetes and diabetes, and when HbA1c may be misleading.

TSH and the thyroid: what can a high or low TSH mean?

TSH is usually the first-line test of thyroid function. Learn why it should be interpreted together with FT4, symptoms, medication and the clinical context.

Ferritin and iron: what does a low ferritin mean?

Ferritin is a key marker of iron stores, but inflammation can increase it. Learn why ferritin should be interpreted together with the full blood count and the clinical picture.

Vitamin D: what does 25(OH)D measure and what can a low result mean?

Why 25-hydroxyvitamin D is the usual test for vitamin D status, what lower results can indicate, and why there is no single “ideal” value for every person.