 [ Symptoms ] hello i am newly mom and breastffeding my baby from last three months i have noticed lump in my left breast recently i am worried about the breast cancer please advise me and would want to know if it is related breast cancer [ Disease ] hi found this lovely piece of info on warm milk that should really help answer your question milk contains tryptophan an amino acid that is a precursor to the sleep inducing compounds serotonin and melatonin for tryptophan to have a sedative effect it needs to enter the brain by crossing the blood brain barrier an effective way for this to happen is to consume warm milk together with a carbohydrate sugar carbohydrates sugarand proteins in milk and heat together makes tryptophan more available to the brain this promotes the clearance of other amino acids from the bloodstream and facilitates the entry of tryptophan into the brain where it can act to produce a sedating effect so warm over cold is still best cold is best if you have small upset stomach or some acid going round it hope this still helps you good luck