What is the ruling on vampire injections that use blood for cosmetic purposes?

Summary

Cosmetic injections, even for removing wrinkles, are prohibited unless done for medical purposes, such as correcting a defect that causes pain or deep physical and psychological effects, as long as no harm results. Blood is considered impure, so using it in treatment is forbidden unless no pure alternative medicine exists. For treating illness, the material must be pure, must not cause greater harm, and must be confirmed as a remedy by a trustworthy specialist doctor.

Written in our own words from the original fatwa — check the source before acting on it.