Can I take Vitamin B12 and Vitamin B2 together?
Drug interaction guide
Originally published 25 Jan 2026
Meets Patient’s editorial guidelines
- DownloadDownload
- Share
- Language
- Discussion
- Audio Version
- Add to preferred sources on Google
There is no known harmful interaction between vitamin B12 (cobalamin) and vitamin B2 (riboflavin). In fact, these vitamins often work together to support your health.
Why this happens
Vitamin B12 and vitamin B2 are both water-soluble vitamins from the B-complex family. They do not interfere with each other's absorption, metabolism, or excretion. Instead, they have a synergistic relationship; vitamin B2 is actually required to help convert vitamin B12 into its active form so the body can use it properly.
What you should do
It is safe to take vitamin B12 and vitamin B2 together. They are frequently found combined in B-complex supplements or multivitamins. Always follow the dosage instructions on the product label or as advised by your healthcare professional.
Food and drink warnings
Alcohol
It is best to avoid or strictly limit alcohol while taking Vitamin B12. Regular or heavy alcohol consumption can interfere with the body's ability to absorb Vitamin B12 from the gut, making the supplement less effective. Combining alcohol with medications can also increase the risk of liver damage.
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.
Patient picks for Drug interactions

Drug interactions checker
Can I take Mounjaro and Insulin together?
Taking Mounjaro (tirzepatide) and insulin together significantly increases your risk of having a 'hypo' (hypoglycaemia), which is when your blood sugar levels drop too low. Symptoms of a hypo can include feeling shaky, sweaty, dizzy, hungry, or confused. In severe cases, it can be dangerous.

Drug interactions checker
Can I take Ashwagandha and Vitamin B12 together?
There are no known clinical interactions between ashwagandha and vitamin B12. It is generally considered safe to take these two supplements together.
Article history
The information on this page is written and peer reviewed by qualified clinicians.
Article also available in English, German, Spanish, French, Italian, Portuguese, Hindi, Hebrew, Arabic, and Swedish.
25 Jan 2026 | Originally published
Join the conversation
Share your thoughts or experiences with others in our patient communities.

Ask, share, connect.
Browse discussions, ask questions, and share experiences across hundreds of health topics.

Feeling unwell?
Assess your symptoms online for free
Sign up to the Patient newsletter
Your weekly dose of clear, trustworthy health advice - written to help you feel informed, confident and in control.
By subscribing you accept our Privacy Policy. You can unsubscribe at any time. We never sell your data.
More in drug interactions checker
- Can I take Amitriptyline and Trazodone together?
- Can I take Amlodipine and Doxadura together?
- Can I take Amlodipine and Paracetamol together?
- Can I take Ashwagandha and Vitamin B12 together?
- Can I take Aspirin and Lansoprazole together?
- Can I take Atorvastatin and Metformin together?
- Can I take Atorvastatin and Omeprazole together?
- Can I take Atorvastatin and Reishi together?
- Can I take Atorvastatin and Rivaroxaban together?
- Can I take Atorvastatin and Turkey tail together?
- Can I take Berberine and Nexplanon together?
- Can I take Colecalciferol and Trazodone together?
- Can I take Doxadura and Ginseng together?
- Can I take Ginger and Turmeric with black pepper together?
- Can I take Hydroxychloroquine and Naproxen together?
- Can I take Lisinopril and Potassium together?
- Can I take Losartan and Vitamin D together?
- Can I take Magnesium and Flecainide together?
- Can I take Pregabalin and Prozac together?
- Can I take Warfarin and Ibuprofen together?