Feb 2019;10(2):398-406
Dietary sources of vitamin B12 include: Meat and poultry: Beef, lamb, pork, and chicken are excellent sources Fish and seafood: Particularly salmon, trout, tuna, and shellfish Dairy products: Milk, cheese, and yoghurt provide readily absorbed B12 Eggs: Especially the yolk Fortified foods: Many breakfast cereals, plant-based milk alternatives, and nutritional yeast are fortified with B12 For vegans and vegetarians , who are at increased risk of deficiency, the Vegan Society and British Dietetic Association recommend: Regular consumption of fortified foods (at least three servings daily) Consideration of B12 supplements (typically 10 micrograms daily or 2000 micrograms weekly) Monitoring of B12 status as advised by a healthcare professional based on individual risk Supporting overall hair health involves a holistic approach: Maintaining a balanced diet rich in protein, iron, zinc, and biotin Ensuring adequate hydration Managing stress, which can affect hair growth cycles Avoiding harsh chemical treatments and excessive heat styling Protecting hair from environmental damage When to seek medical advice: If you follow a vegan diet and have not arranged B12 supplementation If you have conditions affecting nutrient absorption (coeliac disease, Crohn's disease, previous gastric surgery) If you take medications that may interfere with B12 absorption long-term If you experience symptoms suggestive of deficiency It is important to recognise that whilst optimising B12 status supports overall health, supplementation will not reverse age-related greying in most cases
Your body absorbs only as much as it needs and any excess is removed through your urine
Mood swings or irritability
Avoid buying medications that are marketed and sold online without any labels
Vitamin B 12 and nucleic acid metabolism The figure shows pathways of folate and vitamin B 12 metabolism of nucleic acid synthesis and methylation reactions
