Excellent product, as worth all the ND products I've used.
I bought this stuff roughly a year ago, when the FDA started prohibiting sale of phenylethylamine (PEA). I put it in my 50 gallon tote full of ND supplements and encapsulating supplies, then forgot about it. About a month ago, I took inventory of my supplements, saw the 250 grams of powder, and figured I would finally break the seal to find out what DL-Phenylalanine is all about. Here's my experience taking 500mg once a day thus far: Day #2: Notable elevation in both mood and energy. I have 4 herniated and one ruptured disc, so I'm hoping to realize pain relief soon. Day# 5: My sleep since day #2 has been better than I have had since I started taking n-acetyl-cysteine. I have been sleeping so well, in fact, that my back pain has been slightly worse. Day 7: Turmeric with piperine was a huge relief for my back; ksm-66 and L-theanine helped to extinguish and keep away the muscle spasms and tightness that always accompany a sore back. My mood have steadily climbed higher; sometimes I just sit, on he lawn with my German Shepherd and enjoy the feeling of being alive. Day 10: My energy and mood are excellent; I am getting restful, sound sleep 5-6 nights a week; no remarkable pain relief has been realized. I am still taking turmeric and piperine, so there is the possibility any benefits are being masked. Day 15: I am very happy with this supplement; I wish I had not waited a year to try it. My energy and mood are maintaining a steady level and I have noticed that I feel more limber when I am physically active. I am still taking turmeric and piperine, but they have never had this effect, so it must be from the DL-Phenylalanine or a synergy in the combination. Day 22: Still feeling great. No Renaissance changes in a week, but compared to a month ago, I feel mentally better and have higher, more consistent energy levels. I have read that for pain relief, some people take up to 3,000mg a day, so I think I will up the dose to 750 or 1,000mg starting tomorrow. If I experience anything notable, I will update my review, but this is already another easy 5-star product from ND!