Enfamil Gentlease Powder, 1800 calories per 12.4 ounce can. Enfamil Gentlease is a 20 Cal/fl oz, milk-based infant formula designed to reduce fussiness, gas and crying. It has an easy-to-digest milk protein blend patterned after breast milk (whey and casein in a 60:40 ratio) that has been partially broken down. The formula is nutritionally balanced and has docosahexaenoic acid (DHA) and arachidonic acid (ARA), nutrients also found in breast milk that promote brain and eye development.