What is SynBio Vitamin B12?
SynBio Vitamin B12 is a food supplement that supports normal energy release, nervous system function, and red blood cell formation. Vitamin B12 plays an essential role in reducing tiredness and fatigue, supporting psychological function, and maintaining healthy nerve cells.
Vitamin B12 is naturally found in animal-based foods such as meat, fish, eggs, and dairy. Taking additional supplements may be needed for individuals who have low dietary intake or difficulty absorbing vitamin B12.
Who is SynBio Vitamin B12 suitable for?
SynBio Vitamin B12 capsules are suitable for adults, children, and adolescents who wish to maintain healthy vitamin B12 levels and are able to swallow capsules.
Vitamin B12 supplements are commonly recommended for people who:
- Follow a vegetarian or vegan diet
- Experience fatigue or low energy levels
- Have low vitamin B12 levels
- Have absorption issues (e.g. due to digestive conditions or medications)
- Are middle-aged or elderly
How to take SynBio Vitamin B12?
You should always take SynBio Vitamin B12 as advised by your pharmacist, and refer to the patient information leaflet for more information.
For adults and children aged 12 and over
Take one capsule daily with water, preferably with or after food.
If you miss a dose
Do not take a double dose to make up for a missed capsule. Simply take the next dose when you remember.
If you take more than the recommended dose
Vitamin B12 is generally considered safe, even at higher doses. However, if you take more than the recommended amount and experience any unusual symptoms, contact 111 for advice.
How to store SynBio Vitamin B12
- Store the capsules in a cool, dry place
- Store below 25 degrees celsius
- Keep the capsules in their original container
- Keep out of the sight and reach of children
- Do not take this supplement after the expiry date on the packaging
Vitamin B12 rarely causes side effects. In uncommon cases, some people may experience:
- Headache
- Nausea
- Mild diarrhoea
- Skin rash
If you experience any concerning side effects, stop taking this supplement and seek medical advice.
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Our Clinical Authors
This page has been written by a registered UK pharmacist and reviewed by our clinical team to ensure it is accurate, clear and reflects current clinical guidance.
Last medically reviewed: 07 July 2026
Last updated: 07 July 2026