The Science of Absorption The biggest difference between injections and pills is how B12 enters your system, and for many people this is the deciding factor
As an example, Zepbound (tirzepatide), is approved by the FDA for chronic weight management in adults with obesity (BMI of 30 kg/m2 or greater) or overweight (BMI of 27 kg/m2 or greater) with at least one weight-related condition, which can include conditions other than type 2 diabetes
EFSA 2012: Scientific Opinion: Scientific Opinion on the safety and efficacy of L- carnitine and L-carnitine L-tartrate as feed additives for all animal species based on a dossier submitted by Lonza Benelux BV
For example, in hereditary leiomyomatosis and renal cell cancer (HLRCC), a high level of fumarate caused by genetic mutation of fumarate hydratase induces the succination of Kelch-like ECH-associated protein 1 (KEAP1) accompanied by the consumption of a fumarate molecule 134,135
It is safety guidance
doi: 10.1002/ajmg.c.30287.[PubMed] [CrossRef] Tang WH, Wang Z, Levison BS, et al