Because GMP delivers protein with far less phenylalanine than intact dietary protein, these products let you hit your daily protein equivalent without exceeding your Phe allowance. Glytactin BUILD 20/20 is a versatile everyday supplement at 110 calories per packet, offered in flavors including Vanilla, Raspberry Lemonade, and a neutral Smooth option for mixing into recipes. Glytactin BUILD 10 provides a lighter 54-calorie serving well suited to smaller or younger users. Glytactin BetterMilk mixes into a milk-style drink at 160 calories per packet, and Glytactin RTD 10 Chocolate comes pre-mixed in an 8.5 oz carton for grab-and-go convenience — no measuring or mixing required.

The individual-packet formats matter more than they might seem: they make consistent dosing simple, travel easily, and help caregivers and adults alike stay on protocol at school, work, or away from home. Rotating flavors and formats also helps prevent the taste fatigue that can undermine long-term adherence — a real concern when a formula must be taken daily for life.

Glytactin is a medical food intended for use under the supervision of a physician or metabolic dietitian as part of a prescribed low-phenylalanine diet. If you're coordinating a PKU plan, your clinic can advise on which calorie level and format best fit your Phe tolerance and protein goals.