Can I take Black garlic and Evening primrose oil together?

Why this happens

Black garlic contains compounds that prevent blood cells (platelets) from sticking together. Evening primrose oil contains gamma-linolenic acid (GLA), which also has mild blood-thinning effects. When used together, these effects can add up, making it harder for your blood to clot.

What you should do

Use this combination with caution. Watch for signs of unusual bleeding, such as nosebleeds, bleeding gums when brushing your teeth, or dark, tea-coloured urine. If you have an upcoming surgery or dental procedure, stop taking both supplements at least two weeks beforehand. If you are already taking prescribed blood thinners (like warfarin or aspirin), do not take these supplements without speaking to your doctor first.

Important precautions

Surgery or bleeding disorders

Both supplements can thin the blood and increase the risk of bleeding. You must stop taking them at least two weeks before any planned surgery or dental procedure.

Epilepsy or seizure disorders

Evening primrose oil may lower the seizure threshold, making fits more likely, especially if you are taking medication for epilepsy or schizophrenia (such as phenothiazines).

Food and drink warnings

Alcohol

While there is no direct chemical interaction, both black garlic and evening primrose oil can have mild blood-thinning effects. Excessive alcohol consumption can also thin the blood and increase the risk of stomach irritation; therefore, moderation is advised to avoid an increased risk of bruising or bleeding.

Using other medicines

Taking multiple medicines? Our Medicines Interaction Checker helps you check whether your prescriptions, over-the-counter medicines, and supplements are safe to take together. Simply search for your medicines to see potential interactions and what to do about them.

Disclaimer

This information is for general educational purposes only and should not be relied upon as a substitute for professional medical advice. Always consult your GP, pharmacist, or another qualified healthcare professional before making decisions about your medications. Individual circumstances may vary, and only a healthcare professional who knows your medical history can provide personalised guidance.