Drink up the daily dose of quiz boyz & girlz

This drink was first introduced by glaxo during World War 2 as an essential nutrient supplement for soldiers. It made its way to India in 1964 when it was marketed through doctors as a health drink used for recuperation after an illness. To increase the user base, the brand was positioned as a nutrional supplement as opposed to just a compensator for dietary deficiencies. Identify this food drink which is now owned by Heinz Foods