For complete information on these combination formulations, read our dedicated guides on tirzepatide with B12 and tirzepatide with niacinamide
[DOI] [PubMed] [Google Scholar] 219.Fruebis J, Tsao TS, Javorschi S, et al
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this is the most common cause of vitamin B12 deficiency in the UK a lack of these vitamins in your diet this is uncommon but can happen if you have a vegan diet and do not take vitamin B12 supplements or eat foods fortified with vitamin B12, follow a fad diet or have a generally poor diet for a long time medicine certain medicines, including anticonvulsants and proton pump inhibitors (PPIs), can affect how much of these vitamins your body absorbs Vitamin B12 and folate deficiency are more common in older people, affecting around 1 in 10 people aged 75 or over and 1 in 20 people aged 65 to 74
In the International Directory for Vegan Nutritionist you can find experts on vegan nutrition in your area or online.