which become cracked and sore. These conditions are
cured by giving the person vitamin B2.

The amount of riboflavin needed by children 13 to 15
years old is 2.0 milligrams a day. Six ounces of liver will
supply this amount. Riboflavin is found in small amounts
in many foods. Among the best sources are the following:

FOOD
Liver
Kidney
Heart

American cheese
Broccoli leaf
Cottage cheese
Kale
Spinach
Peanuts, raw
Bran

Turnip greens
Eggs
Lean beef

NicotmJ£fjiddJt ,or .niacin.* is a third member of the

t-^,-i- " "" '"•'"'* •> '

vitamin B family. In its pure form it is a white crystal
and has a bitter taste. It dissolves in water but is not
easily destroyed by acids, baking soda, heat, or light.
It was at first called vitamin G.

Nicotinic acid is important for the prevention of a
disease called pellagra* This disease is sometimes called
"rose sickness" because the skin becomes red and perhaps
because it occurs more often in the spring and early
summer. The person with pellagra has a red and swollen

148

MILLIGRAMS PER 1OO GRAMS OF THE FOOD