My journey through hell (the illness cannot be named) always leads me back to Vitaminexpress. All products work, always noticeably. Amino acids are often more effective in high doses, including Tyrosine. Due to my brain being under-supplied with serotonin, dopamine, etc., every additional supply of amino acids, whether Tyrosine, Tryptophan, or 5 HTP, is directly felt. Immediately after intake, the synapses communicate, noticeable by a slight tingling in the head and a bit more tinnitus than usual. I endure these side effects more calmly than those of the chemical hammer. As a result, I am more awake, agile, can express myself better, forget less, and overall, my life force is back. Anyone who has suffered from these limitations for so many years knows what I mean. I can only recommend the intake of amino acids. This way, I also feel good after menopause, which I had not known before. Doctors do not support you in these matters. The body calls, and you have to help it. I have been a customer of Vitaminexpress for years, and they help you here. The offers are commendable, which I gladly use. Thank you, also for the opportunity to contact you in case of intolerance. Thank you, thank you, thank you.