Perika Difference: The patented Perika extract (WS 5570) is standardized to hyperforin - one of the key mood enhancing actives found in St. John's Wort.* HyperiSure System Stabilizing Technology: Hyperforin is rather unstable and can lose potency over time. However, using our proprietary HyperiSure System stabilizing technology, Perika delivers a guaranteed level of hyperforin for optimal potency.