In some rare cases, very high levels of B12 in the blood can be associated with minor side effects like mild acne, dizziness, or a temporary rash
Whichever you decide on, the idea is to place the correct amount under your tongue and let it dissolve completelywithout swallowing (UMichigan Health Library, 2018)

We focused on the following areas: Taste and texture: for gummies and sprays, we noted whether the flavour was pleasant and the texture easy to consume Form of vitamin B12: we checked whether the B12 was provided in an effective form, such as methylcobalamin or cyanocobalamin, and if it was combined with other nutrients that might support its function Nutrient profile: each product was examined for the amount of vitamin B12 per daily dose and how this compared with the Nutrient Reference Value (NRV) Additives: ingredient lists were reviewed for bulking agents, preservatives, artificial sweeteners or colourings, with simpler formulations highlighted Dietary requirements: we checked whether products were suitable for vegetarians, vegans or those following gluten-free diets Value for money: cost per daily dose was compared across products, weighing price against dosage, formulation and overall quality Why you can trust Good Food reviews Our review of vitamin B12 supplements was created with input from a qualified nutritionist, who guided us on the most effective forms of B12, such as methylcobalamin and cyanocobalamin, and how theyre best absorbed by the body

It is important however, to know what disease process may be contributing to a B12 deficiency and to follow the correct dosing protocol for oral or injectable B12 supplementation
It's not just about what a compound does , but how effectively and reliably it gets there
They seek out fat, directing it away from the liver and ensuring it's used as fuel for energy rather than sticking around unwanted