The Delicate Nature of Vitamin C Vitamin C, also known as ascorbic acid, is a powerhouse ingredient in skincare, renowned for its antioxidant properties, ability to brighten the complexion, and stimulate collagen production.However, it's also a highly unstable compound. It's extremely sensitive to light, air, and heat.Once exposed to this substance, vitamin C will be quickly destroyed, lose its efficacy and become useless. Such decline not only prevents you from enjoying all the benefits brought by the essence, but may also cause side effects and skin discomfort. The Advantages of Dark Glass Bottles Dark glass bottle (usually amber or brown in colour) act as a shield for Vitamin C serum. The dark glass bottle acts as a natural filter, blocking most ultraviolet (UV) and visible light. This helps to slow down the oxidation process that occurs when vitamin C is exposed to light, thus maintaining the stability and potency of the serum longer. In addition, glass is an impermeable material, ...