Sustagen is a nutritional supplement beverage brand, available in both ready-to-drink and powdered form, manufactured by the food science division of Nestle, and includes products for those with special dietary requirements for example, gluten-free, low lactose, high fibre, high protein or with added probiotics.
The Nestle food science division also manufactures the Optifast Nutritional line, which includes weight-loss shakes.
[1] Susy and Geno were mascots in Sustagen as a child form in mid-late 1980s until late 1990s.
Later, they were revived twice, in 2008 (soft revived) and as an adult form in 2013.
[2] The product comes in five varieties: