Research also suggests that B12 can increase sensitivity to environmental conditions like light and promote alertness.

For Deficiency Treatment

Healthcare providers may recommend or prescribe higher doses of B12 to treat a deficiency.

Consistency is most important when treating a B12 deficiency.

best time to take B12; Female hands holding pills and glass of water, taking medicine in morning

MementoJpeg / Getty Images

A healthcare provider will recommend a dosing schedule for oral vitamin B12 supplementation.

If you need a higher dose, your provider may recommend B12 injections.

A healthcare provider typically administers B12 shots.

The frequency of B12 shots can vary, though most people receive monthly shots.

Taking B12 on an empty stomach improves absorption, while some foods and beverages may reduce its effectiveness.

you’ve got the option to take vitamin B12 with other supplements or medications.

Potential Side Effects

Vitamin B12 is generally safe and does not typically cause side effects.

Early detection and treatment can help prevent long-term nerve damage and other complications related to B12 deficiency.

Summary

Vitamin B12 is essential for energy production, nerve function, and red blood cell formation.

Consistent daily use is more critical than when you take it, especially if treating a deficiency.

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