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The serving size is two capsules, giving you a total dose of 1,200mg of berberine, but you can easily halve the daily dose instead

Vitamin C can help the body fight off viral infections and is useful in treating colds, influenza, and hepatitis

Intramuscular (IM) administration of B12 allows for direct delivery, bypassing the digestive system and ensuring efficient absorption, particularly in individuals with malabsorption or gastrointestinal issues

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The Pernicious Anaemia Society notes this is recognised but not fully understood