Sermorelin is a synthetic analogue of growth hormonereleasing hormone (GHRH)
Additionally, other factors such as having had gastric bypass surgery or taking antacids long-term can lead to deficiency
doi: 10.1016/j.yebeh.2019.106675 [PubMed] 31774955 Kapur J, Elm J, Chamberlain JM, Barsan W, Cloyd J, Lowenstein D, Shinnar S, Conwit R, Meinzer C, Cock H, Fountain N, Connor JT, Silbergleit R
The liver also produces small amounts, which aren't sufficient for the body's needs, so it's important to consume choline-rich foods
The Food and Nutrition Board, the National Academy of Sciences-National Research Council recommend that lactating women should consume 4 mcg of vitamin B12 daily (11)