It's an amazing product. I've always needed to take magnesium supplements, specially on winter, due to the musclar contractions I suffer. In the recent past months, I've had a few memorie loss, headaches, because I've been slepping less hours a day. I'm in college and I have a laundry company with my fiancé, so it's been an exaustive routine. Since I started taking Life Extension Neuro-Mag Magnesium L-Threonate w/ Calcium & Vitamin D3, all the sympthomes I described stoped completly. It was life chanching for me. I've taken other types of magnesium, but they weren't so effective. Addictionally, I loved the tracking system. I live in a southern European country and some people told me I would'n receive the product because it comes from the USA. I'm glad I took the risk. I will definetly recommend the product from this company. Thank you for your excellent job.