For this reason, taking high doses of B12 does not benefit people without an increased need. Summary

Additionally, B12 deficiency in infants can lead to lethargy, decreased appetite, and failure to thrive ( 17).Though vitamin B12 is available in several different forms, research suggests that they are similar in terms of absorption and effectiveness. Various types of supplements are also available depending on your preferences, including oral capsules, nasal sprays, and liquid drops. Taking 200mg or more a day of vitamin B6 [LK2] can lead to a loss of feeling in the arms and legs known as peripheral neuropathy.

Just because a supplement is not tested by one of these three companies, it does not mean it’s a bad product. We recommend doing some research on the reputability of the manufacturer, and calling up the manufacturer and their testing lab to determine their protocols and decide if you feel comfortable consuming the supplement. Niacin cannot be stored in the body, so you need it in your diet every day. What happens if I take too much niacin? Perhaps most importantly, B12 is vital in the formation of healthy red blood cells that carry oxygen around our body, meaning low levels of B12 can reduce the oxygen being transported to your body’s cells - this, in turn, can leave you feeling weak, tired, and generally run-down," says Shona.

Therefore, the Recommended Dietary Allowance (RDA) for vitamin B12 during pregnancy is 2.6 mcg. This level can be met through diet alone or with a prenatal vitamin ( 1). Breastfeeding people There's not enough evidence to show what the effects may be of taking high doses of vitamin B12 supplements each day. What does the Department of Health and Social Care advise? Additionally, there is currently no evidence that one form of vitamin B12 supplement, such as capsule or liquid, is better absorbed than another. However, you may want to take more or less, depending on your age, lifestyle, and specific situation. We support supplements that are evidence-based and rooted in science. We value certain product attributes that we find to be associated with the highest quality products. We prioritize products that are third-party tested and certified by one of three independent, third-party certifiers: USP, NSF, or ConsumerLab.com.