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However, it is primarily found in animal-based products, making it difficult for vegans and vegetarians to get adequate levels of B12 through diet alone

These symptoms may suggest inadequate B12 replacement, concurrent iron or folate deficiency, or alternative haematological conditions requiring investigation

Additionally, older adults, people with gastrointestinal conditions, and those on certain medications, including proton pump inhibitors and metformin, may need to take a supplement

This can run in families and is often associated with low thyroid levels( hypothyroidism), type 2 diabetes and coeliac disease

Dry or tired-looking skin