If you're looking for a skincare serum that provides speedy results, iS Clinical Active Serum, $128, may be the product for you. This serum uses a combination of naturally derived acids to revitalize the texture of the skin. Ahead, learn all about this cult favorite product.

What Is iS Clinical Active Serum?
iS Clinical Active Serum is formulated to transform the skin on a short-term and long-term basis. It contains a number of potent botanicals, which help to diminish the signs of aging, get rid of blemishes and brighten skin tone. The paraben-free formula tingles when applied, and it instantly smooths and hydrates tired skin.

What Ingredients Does It Contain?
This botanical serum harnesses the power of nature to improve the health of the skin. It contains sugar cane extract, which is a natural source of glycolic acid. Glycolic acid helps to exfoliate the skin and gets rid of the dead skin cells and debris that clog up the surface of the skin. This rejuvenates the appearance of the complexion.

The bilberry extract found in this serum is a source of lactic acid, which imbues the skin with moisture. White willow bark extract is a source of salicylic acid, which is one of the best ways to ward off acne. Salicylic acid penetrates deep into the pores, clearing them of blemish-causing dirt and reducing their size. The serum also contains arbutin and mushroom extract, which helps to diminish hyperpigmentation.

How Do I Use It?
iS Clinical Active Serum should be applied after cleansing. It can be used in the morning and in the evening. For best results, the serum should be used in combination with other skin care products, such as moisturizer and sunscreen.

Who Is It Designed For?
According to iS Clinical, this serum is gentle enough for all skin types. Because the exfoliating ingredients are combined with hydrating botanicals, even people with sensitive skin should be able to tolerate this serum.

What Are the Benefits of This Serum?
iS Clinical Active Serum is designed to heal and prevent blemishes, diminish the appearance of pores, minimizes fine lines and wrinkles, soften the skin and brighten the skin tone.

Where Can I Get It?
iS Clinical products are available on a number of authorized online retailers, including Amazon, DermStore, SkinStore and LovelySkin. This serum may also be available in your local dermatology office.

What Are the Reviewers Saying?
This serum has received mixed reviews online. It has a rating of 3.1/5 on the website MakeupAlley, and only 50 percent of reviewers say that they would repurchase the product. The website Beautypedia also finds fault with the product, saying, "The amount of alcohol is cause for concern because alcohol causes free-radical damage and encourages collagen breakdown rather than stimulation, and none of the plant extracts have convincing research proving they are capable of doing what iS Clinical states."

Nonetheless, some reviewers find this product to be effective. The website FutureDerm gives it an impressive 8/10 and says that the serum is "a very solid product for fighting hyperpigmentation - age spots, melisma and the like. That said, I would not use it anticipating it to get rid of acne if I was already using alpha hydroxyl acids and salicylic acid to treat acne."