Yes, numerous studies have proven the penetrating effects of skin needling. The Dr. Dermacare beginner .3mm roller is designed to enhance the benefits of skincare products. If you do not see any improvement after using a Dr. Dermacare roller for 3 months, then you need to carefully examine the skincare products you currently use as they might not contain any or adequate amounts of active ingredients. This is why for best results we recommend you use our Dr. Dermacare skin care products as we can guarantee they contain a high percentage of active ingredients.