43.5% Full Spectrum Kratom extract is our high-end kratom extract. This is a highly concentrated extract. We do offer pure kratom isolate in liquid suspension, but this is our most concentrated powder extract. This is about half the purity of the pure isolate. Even 150mg is equal to a gram or more of cheaper, less-refined extracts. This is a full spectrum extract, so it contains the full alkaloid profile found in the leaf it was extracted from. We only have this product in limited supply, and it may not be available indefinitely.