Can I take Black garlic and Vitamin B complex together?
Drug interaction guide
Originally published 25 Jan 2026
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There are no known harmful interactions between black garlic and Vitamin B complex supplements. In fact, black garlic is naturally rich in several B vitamins, and taking them together is generally considered safe.
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Why this happens
Black garlic is produced by ageing regular garlic under controlled heat and humidity. This process changes the chemical makeup but does not create compounds that interfere with the absorption or metabolism of B vitamins. Both are water-soluble and processed by the body without competing for the same pathways.
What you should do
Back to contentsYou can safely take these together. As with any supplement, it is best to follow the dosage instructions on the product packaging. If you have an upcoming surgery, inform your doctor about the black garlic, as high doses of garlic can sometimes thin the blood.
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Important precautions
Back to contentsSurgery or dental procedures
Black garlic can thin the blood and increase the risk of bleeding. You must stop taking it at least two weeks before any scheduled surgery or dental work.
Bleeding disorders or use of blood-thinning medication (e.g. warfarin, aspirin)
Black garlic may enhance the effect of blood-thinning medicines, significantly increasing your risk of bruising or bleeding.
Food and drink warnings
Back to contentsAlcohol
Black garlic may have a mild blood-thinning effect. While there is no direct contraindication, excessive alcohol consumption can also thin the blood and increase the risk of bleeding or bruising. Use alcohol in moderation.
Caffeine (Coffee/Tea)
Caffeine acts as a mild diuretic and can increase the excretion of water-soluble vitamins like the B complex. Additionally, tannins in tea and coffee can interfere with the absorption of certain B vitamins. It is best to take your supplement at least an hour before or after drinking tea or coffee.
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Using other medicines
Back to contentsTaking 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.
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Treatment and medication
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Taking esomeprazole for a long time may reduce how much calcium your body absorbs from your diet or from certain supplements. This can lead to weaker bones and an increased risk of fractures, particularly in the hip, wrist, or spine, if used at high doses for over a year.
Treatment and medication
Can I take Calcium and Ezetimibe together?
There is no known interaction between calcium supplements and ezetimibe. Taking these two together is generally considered safe and should not affect how well your cholesterol medication works.
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Article history
The information on this page is written and peer reviewed by qualified clinicians.
25 Jan 2026 | Originally published
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