Does food we eat changes the taste and nutrients of milk for the baby, can we eat spicy foods or foods that may cause gas while breastfeeding?

Although strong flavors such as garlic can change the smell and flavor of breast milk, this does not cause any harm to the baby , it is common for mothers to be warned to avoid “gassy foods” such as cabbage, cauliflower, and broccoli. Eating such foods can cause gas in the mother's bowel; however, gas and fiber do not pass into breast milk. Similarly, acidic foods like citrus fruits, pineapple, and tomatoes do not affect breast milk. However substances like excessive caffeine , alcohol could cause harm to the baby. (Source : National Library of medicine U.S.)