At Amazing Grace we believe in keeping strict standards and also in making full use of materials we harvest. All supplements come from raw material that is graded “premium”, and any raw material that does not fall into our specified range of “premium” grade is tested to see if it will pass “food” grade. At this level of grading Sang Hwang extracts are safe and effective for human health. Now these food grade Sang Hwang extracts are available in many formats to complement your lifestyle with great natural health products.