Question
My daughter is five years old and recently discovered small hard lumps in her chest, could it be precocious puberty? My child was four years old and had poor immunity, taking lysine B12 intermittently for nearly a year, is there a risk of precocious puberty?
Answer
Lysine is one of the essential amino acids in the human body, but long-term intake does not lead to precocious puberty. The causes of precocious puberty may be various, including an over-sensitivity of the hypothalamus to gonadotropin feedback, which may result in premature secretion of gonadotropins. Precocious puberty may also be caused by certain tumors in the brain or tumors caused by exogenous hormones.