The Leech Woman

The Leech Woman is a 1960 American horror film directed by Edward Dein.

Following her back to Africa, he and his aging, unhappy wife June Coleen Gray witness a secret ceremony of the Nando tribe that utilizes orchid pollen and a male victims pineal gland secretions extracted from the back of the neck via a special ring to temporarily transform Malla once more into a young and beautiful girl Kim Hamilton.After discovering her conniving husband only brought her along as a test subject, June steals the ring and escapes back to the United States alone where, pretending to be her own niece Terry Hart, she proceeds to keep herself young by killing men for their pineal extract. ........

Source: Wikipedia