what's the difference between l carnitine and acetyl l carnitine L-Carnitine Vs L-Carnitine Explained – Australian Sports Nutrition Acetyl L-Carnitine (Alcar) - 250g

Rare allergic reactions, including anaphylaxis, have been reported

For patients without absorption disorders, high-dose oral B12 supplements (1,000-2,000 mcg daily) have been shown to be comparably effective to injections in correcting mild to moderate deficiency

Susceptibility to thyroid autoimmune disease: molecular analysis of HLA-D region genes identifies new markers for goitrous Hashimotos thyroiditis

Taquet M, Geddes JR, Husain M, Luciano S, Harrison PJ

Genetic and transcriptomic biomarkers Using high-throughput sequencing technologies, researchers can identify ferroptosis-related molecular markers at the genetic and transcriptomic levels

So most of the evidence comes from animal models , experiments on animals, most often rats