When and which supplements should I stop before my blood test?

Stopping Supplements Before Your Blood Test

To ensure reliable and interpretable results, we recommend stopping dietary supplements 3 days (72 hours) before your blood test.

Stop 72 hours (3 days) before the test

• Vitamins such as B12, D, and C;

• Minerals such as magnesium, zinc, and iron;

• Omega-3 and fish oil supplements;

• Adaptogens such as ashwagandha or rhodiola;

• Probiotics, powdered superfoods, and similar supplements.

You can continue

• Prescribed medications from your doctor, such as thyroid or blood pressure treatments;

• Any ongoing medical treatments.

If you forgot to stop supplements

• There is no need to worry;

• Some markers, such as vitamin B12, may be temporarily elevated;

• The Lucis medical team takes this into account when interpreting your results.

If in doubt, always follow the instructions provided in your Lucis account or contact the Lucis support team.