Niacin is important for the following functions:
Niacin is a vitamin and is synthesized by the human body. Although it is found in an assortment of meat and fish, it can also be found in "vegan" sources like enriched cereals and breads or whole grain products.
The body uses tryptophan to create niacin.
the eggs are produced within the lemon shaped sack, which is part of the worm.
Blood
You should avoid too much niacin when you have gout as the niacin competes with the means the body has for eliminating uric acid,
Niacin
yes from tryptophan
I believe Niacin Equivalent refers to the amount of tryptophan in a food that will be converted into niacin (provided the body is healthy enoguh to make the conversion effectively).
tryptophan is the amino acid precursor of niacin
hormones
niacin
Mitosis would result in more cells being produced within the human body.