Trigeminal Reflex Testing: Occasionally performed in specialized settings to assess nerve function
B12 energy shots and drinks In todays market, some energy drinks or energy shots widely tout high levels of B vitamins, including vitamin B12, claiming that these will make you feel energized and alert
5-Amino-1MQ has shown metabolic benefits in preclinical trials, but no human studies or FDA evaluations currently exist. Hong et al., Nature Medicine Not Typically Screened for in Standard Drug Tests Standard athletic or employment drug tests (urine, hair, blood) do not test for 5-Amino-1MQ

Additional tests may include: Serum folate as folate deficiency can present similarly Thyroid function tests and ferritin (iron stores) particularly relevant when investigating hair loss Holotranscobalamin (active B12) and/or methylmalonic acid (MMA) or homocysteine these may be used to help confirm deficiency in borderline cases where serum B12 alone is inconclusive, in line with British Society for Haematology (BSH) guidance Intrinsic factor antibodies and gastric parietal cell antibodies if pernicious anaemia is suspected As outlined in NICE Clinical Knowledge Summary (CKS): Anaemia B12 and folate deficiency, clinicians should interpret blood results alongside the clinical context, as some individuals may experience symptoms even when serum B12 falls within the lower end of the normal range
Straighten your leg and tighten your quadriceps
Vitamin B12 Injection Dosage For Adults: A Comprehensive Guide