b12 spray vs injection Efficacy of different routes of vitamin supplementation for the treatment of patients with vitamin B12 deficiency: A systematic review and network meta-analysis Spray vitamins are ideal for those who cant swallow pills. B12 Shots: Vitamin B12 Injections

The clinical evidence-based analysis has found that oral supplementation is as effective as intramuscular injections

NNMT inhibition increases adipose [S-adenosylmethionine (SAM)] and [Nicotinamide adenine dinucleotide (NAD+)] levels As youll discover later on in this article, theres a good reason why increased production of SAM and NAD+ within fat cells is beneficial

Interactions with Medications : Blood thinners and diabetic medications, among others, may interact with vitamin B12 and lipotropic drugs

Age- As we age, our bodies may become less efficient at absorbing B12 from food, increasing the risk of deficiency

Im about 4 weeks in and dont notice anything different