Palmitoleic acid, the monounsaturated fat that makes up omega-7, occurs naturally in sea buckthorn oil and macadamia nuts. People take it to support skin, hair, nails, and the moist linings of the eyes, mouth, and digestive tract. Some reach for it when dealing with dry eye or vaginal dryness, though the evidence behind these uses is still emerging.
Swallow it as a softgel or liquid oil, preferably alongside a meal to help your body absorb it. The right dose depends on the product and your personal needs.
Most people tolerate omega-7 without trouble. Large amounts can upset the stomach. No well-documented drug interactions exist, but anyone who is pregnant, nursing, or managing a health condition should talk to a doctor first.