True or False: Breast milk contains substances that enhance immunities.

Breast milk is known to contain various substances that enhance the immune system, making it a complete source of nutrition for infants. It includes antibodies and other immunoglobulins, particularly secretory IgA, which help protect the baby from infections. This immunological benefit is one of the primary reasons breastfeeding is recommended for infants during their early months of life.

Additionally, breast milk contains prebiotics, enzymes, and immune cells that contribute to the development and strengthening of the baby's immune system. The dynamic composition of breast milk adapts to meet the changing needs of both the infant and the mother over time, further supporting the infant’s health and immunity.

Other options suggest varying conditions under which breast milk may or may not support immunity, but the essence of breast milk is inherently tied to its immunological properties, affirming that the statement is true.