The page is direct: HoneyFil is formulated for healthy adult men aged 18 and over, and is not for use by women.
It is not intended for anyone under 18, and it is not intended for women, including during pregnancy or breastfeeding. The page does not explain its reasoning in detail, but a clear restriction is better than a vague one.
If you are buying for a partner, brother or father, make sure the recipient is an adult man who has checked with his doctor. Keep the bottle out of reach of children and do not share it. If anyone in your household who is not the intended user takes some by mistake, contact a doctor or poison control for advice.