Similac Gold 1 is an infant formula based on cow's milk for children from 0-6 months old . A breakthrough formula that enhances immunity. New and improved formula with HMO. Clinically proven results to strengthen immunity. How to prepare Similac Advance Gold for your beloved one? Wash hands and equipment thoroughly. Boil 1 liter of fresh tap water and let it cool for up to 30 minutes. Pour the correct amount of warm water into a sterilized feeding bottle. Measure and add the powder using the provided scoop. Shake the bottle until the powder is completely dissolved. Test the temperature by checking it on your wrist. Feed the formula immediately.