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Forms of Vitamin B12 and Who They Suit B12 Form How Its Taken Best For Tablets/Capsules Swallowed with water Mild deficiency, general wellness, everyday convenience Sublingual tablets Dissolve under the tongue People who may not absorb well through the gut Nasal spray Sprayed into the nostril Those who dislike pills or injections Injections Given in clinic or at home (prescribed) Confirmed deficiency, absorption issues, and faster results Oral tablets and capsules are convenient, but they must pass through the digestive system, which can limit absorption in people with gut issues, low stomach acid, or certain surgeries
One storage trade-off: NaCl can speed aggregation in the vial over weeks. Mix smaller amounts and use within 12 weeks
Was really hoping for increased energy, or better sleep, and any weight loss would be amazing
A deficiency can lead to fatigue, weakness, and sluggishness
[1] It functions as a dual glucose-dependent insulinotropic polypeptide (GIP) and glucagon-like peptide-1 (GLP-1) receptor agonist
Vitamin B12 is a water soluble vitamin, and is important for things like making your healthy red blood cells (the ones that carry oxygen), keeping your nerves working right, and giving you the energy to do all the things you enjoy
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