b12 injections causing fatigue Vitamin & Folate: The Overlooked Cause of and Brain Fog https://jcdailynews.com/vitamin-b12-folate-the-overlooked-cause-of-fatigue -and-brain-fog What You Need to Know

Generally, B12 shots are designed to provide a sustained boost in B12 levels, but the exact timeframe can depend on factors such as your metabolism, lifestyle, and any underlying health conditions

Cold solutions can appear slightly more saturated in color, while warmer solutions may look marginally paler

Magnesium oxide, citrate, and sulfate tend to have the strongest laxative effect, while magnesium glycinate or microencapsulated time-release capsules may be better tolerated among people with gastrointestinal conditions

BOTTOM LINE: Those at greatest risk of vitamin B12 deficiency are vegans and vegetarians, who get little to no B12 from the diet