10-HDA (discovered in 1959) is only found in Fresh Royal Jelly and can not be made artificially. Our Royal Jelly is of the highest quality and potency in the world. We are so proud of this fact that we display the strength, which is measured internationally by the amount of 10-HDA, a powerful essential fatty acid unique to royal jelly which promotes the many health benefits, confirmed by 5 decades of research. A good quality Fresh Royal Jelly contains between 1.4% - 2.% 10-HDA. Most products barely reach the 1.5% mark. Our Premium Royal Jelly contains 2.86% 10-HDA - the highest strength available! Do not buy royal jelly if you do not know the 10-HDA content - you could be wasting your money! The higher the 10-HDA content, the faster you will notice its power and the royal jelly benefits! It is the amount of 10-HDA content within Fresh Royal Jelly that dictates the price on the international market - the higher the content, the higher the price thus the faster the heath benefits are achieved.