BSN Syntha 6 Protein 101: BSN Syntha-6 is one of the most popular proteins ever made from its amazing taste along with its incredible nutritional profile. Syntha-6 is a time released protein meaning that it will digest over an 8 hour time period for optimal absorption. Why This Stuff is Great: SYNTHA-6® is an ultra-premium protein powder with 22g protein per serving and is BSN's best-tasting protein on the market. SYNTHA-6 not only includes essential amino acids and essential fatty acids, but is also an excellent source of fiber, which makes it a nutritious and multi-functional protein supplement