Should I stop taking supplements before my blood test?

No, please keep taking your prescribed medication as usual. This allows us to assess your health in the context of your actual lifestyle.

Please state in the questionnaire what you take and in what dose, so that our medical team can interpret your results correctly and advise you individually if needed.

Please note in particular:

• Iron supplements: These can affect your results. Please pause them before the blood draw and, if needed, agree the exact timing with our medical team.
• Biotin (vitamin B7, for example in supplements for hair, skin and nails): Biotin can distort certain hormone measurements. Please pause it before your test and state this in the questionnaire. Our medical team will be happy to advise you on the best timing, especially for high-dose products.
• Thyroid medication (for example levothyroxine): Please take it after the blood draw, not before.

Please also state in the questionnaire:

• Creatine: can affect kidney function markers.