Some of these products are very inexpensive and inexpensive to make, so I would like to make sure that you don't waste your money. I am going to give the reasons why the products I am recommending are so effective and not so expensive. I am not claiming that this is the ultimate cure or that all the products will cure the appearance problem or for that matter all the problems in general. I am just presenting the most efficient solutions, based on scientific evidence and clinical research. All of the information on this page is based on the results of a study by Dr. Frank M. Krieger that was published in the American Journal of Clinical Dermatology in 1996, in which patients with light and dark spots on the face received a standard combination of 2% retinol, 3% retinoic acid, and 1% retinyl palmitate. The study compared patients to a placebo that included placebo retinol, retinol, and 0.25% linoleic acid. After 10 weeks, patients in both groups had an improvement in the number of dark patches, although it took longer for patients in the retinol group to see improvement. The placebo group had more severe lesions on the forehead and back. In addition, there were more severe skin disorders that included hyperpigmentation, acne, and psoriasis.