Tools

Free supplement tools and data trackers

Her Vitals builds free, no sign-up tools that show the numbers supplement sellers rarely do: what a product costs per effective dose of the active ingredient, and what official NHS data says. Everything runs in your browser or comes from a named primary source. Information only, not medical advice.

Calculators

Cost per effective dose calculators

Price any UK supplement by what matters: per 10 mcg of vitamin D, per 100 mg of elemental magnesium, per gram of EPA + DHA, per 10 g of collagen, per mg of elemental iron. Five calculators, NHS and EFSA reference figures, instant results.

Data trackers

UK HRT Prescribing Tracker

How much HRT the NHS in England dispenses each month, charted from official NHSBSA prescribing data: 1,056,986 items in June 2025, the latest published month. Updated 2026-06-11.

Information only, not medical advice. This tool is educational and is not a substitute for a registered clinician. It does not diagnose anything and does not recommend that you take any supplement. Always read product labels and speak to your GP or pharmacist before starting, stopping or combining supplements.

Read more

Verified UK figures live on our statistics page, and our guides explain the evidence by life stage, from trying to conceive to menopause and the senior years.

OM

Oliver Mackman

Editor, Her Vitals

Oliver leads Her Vitals's editorial coverage of women's life-stage health and supplements. He curates and reviews existing branded products across trying to conceive, pregnancy, postnatal, perimenopause, menopause and the senior years, weighing what the evidence supports against guidance from bodies such as EFSA, the NHS and NICE, and is clear that the content is information rather than medical advice.

Last reviewed: 11 June 2026