Good day. Can you tell me who knows what mixture contains less sugar?

Good day. Can you tell me who knows what mixture contains less sugar? The baby is 3 months old, weighs 9.800, and is 63 cm tall. Born on 3.100 and started on mixed feeding, he has been gaining weight and height significantly. At 5.200 in month, two at 7600. I have a fourth child, my third son was one year ago exactly like this boy in terms of weight, but now doctors say he's suffering from constitutional obesity. They say to give him less formula, more water, chamomile tea, etc. He drinks only two sips and cries when he doesn't drink. I want to know which