U.S. Pat. No. 4,710,387 discloses a nutritional supplement preparation (a powder material in Example 1, and a milk-like drink in Example 2) for pregnant and breast-feeding women containing 10-20% by weight of protein, 16-28% by weight of fat, 43-65% by weight of carbohydrates, 3.5% by weight of moisture, and one or more minerals, trace elements and vitamins, such as calcium and folic acid.