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Certain B vitamins, including B12 and folate, benefit gut health by supporting the growth of beneficial bacteria

While there's no official upper limit, doses up to 2,000 mcg can be safely used to treat B12 deficiency under medical supervision

The available evidence regarding the correlation of levels of vitamin B12 and the likelihood of experiencing symptoms of insomnia is even more limited

Sometimes a surgeon will determine that the risks of remaining on these drugs are too significant and collaborate with the patient to develop a safer approach

43 Serum homocysteine is less specific for B 12 deficiency, and can also be elevated in folate deficiency, vitamin B 6 deficiency, vitamin B 2 deficiency, and impaired renal function, hypothyroidism, and by certain medications

Although vitamin B12 and the terms used interchangeably