different types of vitamin b12 injections Should You Take Natural vs. Synthetic B12? The Truth About B12 Injections:

S-Adenosyl-L-Methionine (SAMe): In Depth | NCCIH

You inject what you believe is your full dose, but your body receives something less, something different, something that may trigger side effects without delivering the therapeutic benefits you are counting on

Food and Drug Administration (FDA-b)

The time it takes for marijuana or cannabinoids from some type of cannabis or hemp product to be completely eliminated from the body depends on many factors, including the dosage/strength used, how often you use it, your weight, your overall metabolism, liver function, general health, and whether you are on other medications