This can likely be extrapolated to Britain, Ireland, and Australia - and is increasing in the global south, due to the invasions of global industrial foods.
Lead investigator Kirsten Herrick, a program director at the Division of Cancer Control and Population Studies with the National Cancer Institute:
“On average, infants consumed a teaspoon of added sugar a day while toddlers consumed about 6 teaspoons a day.”
Added sugars at these ages is a concern due to the impact on future taste and food preferences. “Research has shown that eating patterns established early in life shape later eating patterns,” Herrick said.
For infants, top sources of added sugars were flavored yogurt, “baby food” snacks/sweets, and sweet bakery products.
For toddlers, top sources were were “fruit drinks”, sugars/sweets, and sweet bakery products.
(Black children are at highest exposure, regardless of economic class, due to entangled issues having to do with cultural genocide. Indigenous children were not analyzed, I would guess they are in a similar category).
This is industrial culture, where actual “public health” is rare - and many newborns are given industrial formula milk-replacements that are based in corn syrup and estrogenic soybean oil/protein.