S.C. Code Ann. § 39-29-20: Ingredients of corn meal and corn grits.

It shall be unlawful for any person, except as hereinafter provided, to sell, offer for sale or exchange for any services or goods in this State any corn meal or corn grits which does not conform to the following provisions:

(1) Each pound of corn meal and each pound of corn grits shall contain not less than two milligrams and not more than three milligrams of vitamin B-1 (thiamine), not less than one and two-tenths milligrams and not more than one and eight-tenths milligrams of riboflavin, not less than sixteen milligrams and not more than twenty-four milligrams of niacin or niacin amide and not less than thirteen milligrams and not more than twenty-six milligrams of iron; and

(2) Each pound of corn meal and each pound of corn grits may contain both or either of the following optional ingredients

(a) not less than two hundred fifty U.S.P. units and not more than one thousand U.S.P. units of vitamin D and

(b) not less than five hundred milligrams and not more than seven hundred fifty milligrams of calcium.

But the Commissioner may change the specifications of either the required or the optional ingredients and the amounts thereof as provided in Section 39-29-80.