I started using Day by Day beauty vitamin C serum not knowing all of the benefits I would be receiving. I had used other brands of vitamin C serum that were very high end, and didn't like the sticky feeling my very sensitive skin had after I applied it. I also didn't care for the strong smell or color of the product and it's 'dropper' dispenser. Day by Day Beauty vitamin C serum smells wonderful, is moisturizing without being sticky, and has a pump dispenser, which I love. Two pumps twice a day and I'm absolutely hooked on it! I'm so glad that I found this wonderful product! I have recommended it to all of my girlfriends!