Although microbes are often equated with pathogens, not all are pathogenic and some help humans maintain their health. Which are synthesized by bacteria that live in the human intestine? A. folic acid and vitamin B. B. insulin and vitamin K C. lipids and folic acid D. vitamin K and lipids E. vitamins and B

Folic acid and vitamin B

Explanation:

Some of the intestinal bacteria are probiotic bacteria which help the host’s metabolism to meet nutritional needs.

Probiotic intestinal bacteria belonging to Lactobacillus Bifidobacterium, Bacteriodes, Enterococcus species take part in the synthesis of water-soluble vitamins like biotin, folate, thiamine, nicotinic acid, riboflavin, B12, and pyridoxine.

Folic acid or folate and other B-complex vitamins help the body in better absorption of nutrients from food. Folic acid cannot be synthesized by the body and hence dietary sources need to be taken.

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