We know that 10 HDA is an essential measurement of royal jelly and its potency/quality. Studies have shown that royal jelly may have estrogen-like effects and the 10-HDA components may be significant to this.

Here’s a snippet from a research article with a link to the full article here

“Royal jelly (RJ) excreted by honeybees and used as a nutritional and medicinal agent has estrogen-like effects, yet the compounds mediating these effects remain unidentified. The possible effects of three RJ fatty acids (FAs) (10-hydroxy-2-decenoic-10H2DA, 3,10-dihydroxydecanoic-3,10DDA, sebacic acid-SA) on estrogen signaling was investigated in various cellular systems.”