Source Naturals DLPA DL-Phenylalanine 375mg， Supports an Alert State， 120 Tablets<div style="text-align: left;"><strong>[Product Information]</strong><ul><li class="showHiddenFeatureBullets"><span class="a-list-item"> A 50/50 blend of the D- and L-forms of the amino acid phenylalanine </span></li><li class="showHiddenFeatureBullets"><span class="a-list-item"> Phenylalanine is one of the few amino acids that can be utilized in its D- form </span></li><li class="showHiddenFeatureBullets"><span class="a-list-item"> Researchers believe DPA inhibits the action of an enzyme that breaks down endorphins and enkephalins </span></li><li class="showHiddenFeatureBullets"><span class="a-list-item"> DPA may extend the life of endorphins and enkephalins， and their positive influence on comfort levels </span></li><li class="showHiddenFeatureBullets"><span class="a-list-item"> LPA is the precursor to two neurotransmitters that help support an alert state </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41qHCPhJj7L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51WvkF1fWYL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41Q1upXVnvL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31fYgaLmLDL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51TOFfHRuGL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31VwU-mwwcL.jpg" noproxy>