can vitamin b12 injections cause headaches I've had a migraine since Sept 4th. I took a injection that day (prescribed by my doctor) so I'm wondering if it's related or coincidence. I'm scared to take another one Vitamin B12 [Mecobalamin] Injection -

Vegetarians, vegans, and older adults often struggle to get or absorb enough B12

Thinner individuals may require shorter needles, while those with more muscle or adipose tissue may need longer ones to reach the muscle layer effectively

Second-degree relatives with 25% genetic similarity had a 12% risk, whereas third-degree relatives with 12.5% risk had less than 1%

Factors That Influence Peptide Half-Life A printed or digital peptide half-life chart captures approximate values under standardized conditions, but several variables in the actual research environment can significantly shift observed half-life from the published reference