B12 deficiency can increase the risk of birth defects and may contribute to premature birth or miscarriage
Provides real-world safety data (serious side effects rare) and hypothesis-generating observations for future research
You might be a good candidate if you have confirmed low B12 levels (from lab work), follow a strict vegan/vegetarian diet, have digestive issues reducing B12 absorption (e.g., after gastric surgery, or with conditions like Crohns), or experience chronic fatigue and other symptoms linked to B12 deficiency
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The shorter length means less tissue penetration but may not reach deep enough for people with thick subcutaneous layers
J Pharmacol Sci 2008