Zinc is unusual in that it quickly penetrates and moves through all bodily fluids, especially saliva and nasal secretions. Zinc deficiency has been linked to numerous types of birth defects such as Down's Syndrome, Cleft Lip, Spina Bifida, and Club Limbs. Hiatal hernias have also been linked to low zinc levels, as have such ailments as Alzheimers, Paranoia, Diabetes, PMS, Depression, Infertility, Herpes, Acne, Obesity, Anemia, Alcoholism, Hypertension, Thyroid Disorders, Urinary Tract Infections, Low Libido, Hair Loss, Crohn's Disease, Prostate Cancer, and various eye diseases, including cataracts. In one study, women who were given proper zinc supplements showed an increase of 20% in mental capacity over a 6 week period. Zinc has been medically proven to shrink enlarged prostate glands, helping to prevent prostate cancer. Zinc is essential in maintaining a healthy male respoductive system. It has been shown to be effective in promoting proper brain function and hormone production, which results in greater libido.