Dosage depends on the severity of the deficiency and health conditions
Summary: Sublingual vitamin B12 dissolves under the tongue but is largely absorbed through the digestive system like standard oral tablets, with intramuscular injections remaining first-line treatment for confirmed deficiency in the UK
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The foods highest in vitamin B12 are: Organ meats, such as beef and chicken liver Wild-caught fish, including salmon, herring, mackerel, tuna, trout and sardines (also great sources of other vital nutrients, like omega-3 fatty acids) Organic dairy products, including probiotic-rich yogurt or raw milk Pasture-raised poultry, including turkey or chicken Grass-fed beef and lamb When its not possible to get enough vitamin B12 from your diet, perhaps due to genetic conditions or taking necessary medications, someone might choose to boost intake of vitamin B12 in several ways other than receiving injections
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On an empty stomach, absorption of oral forms improves slightly, so many people take it about thirty minutes before breakfast