In short
- Measure first, then supplement — a supplement should fix a measured gap.
- Without a deficiency the benefit of supplements is small; some even do harm in excess.
- Most useful when there is a need: iron, vitamin D, B12, omega-3, magnesium.
- Trust only authorized claims (EFSA), not marketing promises.
Supplement shelves promise a lot, but the truth is simple. Supplements are a tool for fixing measured deficiencies, not a magic potion. Here is a sober, evidence-based overview, with one idea in mind: "only when indicated".
The principle: food first, measure before you supplement
The body prefers to get nutrients from food. A supplement makes sense when a report shows a real deficiency. It also makes sense when there is a clearly increased need (pregnancy, a vegan diet, intense sport). Taking something "just in case" often does not help — and for some substances (e.g. iron) an excess is not harmless.
What works — when a need has been measured
| Supplement | When it makes sense (authorized EFSA claim) |
|---|---|
| Iron | with low ferritin; contributes to reducing tiredness |
| Vitamin D | when the level is low; for bones and immunity |
| Vitamin B12 | vegans, older people, absorption disorders |
| Omega-3 | for normal heart function (with adequate intake) |
| Magnesium | for muscles, the nervous system and less tiredness |
| Vitamin C | increases iron absorption from food |
The claims listed are authorized EFSA claims. Adjust the dose and duration to your report and to a consultation.
How to choose wisely
1) Aim at a measured value
Supplement what is proven to be low, then check again with a follow-up test. That way you know it works and you do not risk an excess.
2) Quality and form
Choose a form that is well tolerated and absorbed (e.g. iron together with vitamin C; magnesium in a well-soluble form). Less is often better.
3) Watch for interactions
Supplements can affect medicines and each other. If you take regular medication, talk to a pharmacist or doctor.
A realistic approach: measure the key markers → supplement what is low, in a targeted way → repeat the test in 8–12 weeks. That is the difference between guessing and getting results.
How Blood Lab 360 helps you
Upload your report and Blood Lab 360 shows you what is low (ferritin, vitamin D, B12, magnesium). It suggests targeted supplementation and then tracks your progress over time.
Frequently asked questions
Which supplements work for blood?
Those that fix a measured deficiency — iron for low ferritin, vitamin D for a low level, B12 for a deficiency.
Is it better to take supplements just in case?
No. Measure first, then supplement in a targeted way. Some minerals are not harmless in excess.
What does "authorized EFSA claim" mean?
A scientifically confirmed health claim that supplements are allowed to state.
