Can an 18 year old take B12?

Toddlers aged 1 to 3 years need 0.9 mcg of B12 per day. Kids aged 4 to 8 years need 1.2 mcg of B12 per day. Kids aged 9 to 13 need 1.8 mcg of B12 per day. Teenagers aged 14 to 18 need 2.4 mcg of B12 per day.

Can I take B12 without going to doctor?

The Bottom Line. B12 is an important nutrient that is popularly used as a nutritional supplement, even by those without a B12 deficiency. Though doses of up to 2,000 mcg of vitamin B12 are considered safe, it’s best to speak to a doctor to find out whether taking a supplement is necessary.

How much B12 should an 18 year old take?

Recommended Intakes

Age	Male	Female
4–8 years	1.2 mcg	1.2 mcg
9–13 years	1.8 mcg	1.8 mcg
14–18 years	2.4 mcg	2.4 mcg
19+ years	2.4 mcg	2.4 mcg

What age can I take B12?

How much vitamin B-12 should you take?

Category	Vitamin B-12: Recommended Dietary Allowance (RDA) in micrograms (mcg) For children under age 1, only an adequate intake (AI) is available
1-3 years	0.9 mcg/day
4-8 years	1.2 mcg/day
9-13 years	1.8 mcg/day
14 years and up	2.4 mcg/day

What age can you have B12?

Most adults and children aged 2 years and over can take cyanocobalamin.

How much vitamin B does a teenager need?

A wide variety of foods contain vitamin B6, including potatoes, bananas, beans, seeds, nuts, red meat, poultry, fish, eggs, spinach, and fortified cereals. Teen guys need 1.3 mg of vitamin B6 daily and teen girls need 1.2 mg.

What is B12 prescribed for?

Methylcobalamin is used to treat vitamin B12 deficiency. Vitamin B12 is important for the brain and nerves, and for the production of red blood cells. Methylcobalamin is sometimes used in people with pernicious anemia, diabetes, and other conditions.