They work well and help with my energy levels
The brain uses three amino acids tryptophan, tyrosine, and phenylalanine to make the three major neurotransmitters (serotonin, dopamine, and norepinephrine).26 But a 2020 study found seven amino acids that could potentially improve older adults cognitive, social, and psychological functioning: leucine, lysine, isoleucine, histidine, valine, phenylalanine, and tryptophan.27 Similar to NALT for tyrosine, you might see some of these amino acids listed as acronyms
Chronic kidney disease
Factors like the type of peptide used, the application method (topical vs
doi:10.1016/j.biopsych.2006.11.021 75 Lee, T.-M., Lee, K.-M., Lee, C.-Y., Lee, H.-C., Tam, K.-W