L-Tyrosine is a free-form amino acid which rapidly crosses the blood-brain barrier.
...Lactose-intolerance occurs in more than 50% of the world's population. Source Naturals Lactase Digest assists in the digestion
...The essential amino acid L-tryptophan is the precursor for the synthesis of melatonin & serotonin, a hormone & a neurotransmitter involved with mood & stress response.