“Nutritional exposures during the first 1,000 days of life not only contribute to long-term health but also help shape taste preferences and food choices,” the recommendations state.

New US Government guidelines emphasise breast milk is the best option for babies – and can help reduce the risk of obesity later on – if it is not available, infants should get iron-fortified formula. Supplemental vitamin D should also begin “soon after birth”.

The guidelines say children can begin eating “nutrient-dense” and “potentially allergenic foods”, like peanuts, at around six months of age. Infants and toddlers should eat foods from all food groups, especially those rich in iron and zinc.

or pregnant and breastfeeding women, the experts recommend eating up to 12 ounces of healthy seafood, like tilapia and salmon, weekly to help promote baby brain development.

Pregnant women should avoid alcohol, and small amounts of caffeine appear safe, but should be discussed with a physician.

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