Comparison between The Inkey List Collagen Booster vs. The Inkey List Hepta-Peptide Serum

Glycerin is one of the most outstanding and helpful skincare components. It's used in many skincare products because it works and provides notable results. It's one of the best moisturizers. Molecules of Glycerin can absorb water and deliver it into deep layers of the skin making it hydrated.

The component is researched very well. Many scientific researches confirm the safety and the efficiency of the component.

Butylene Glycol is a very popular synthetic alcohol. It helps the product to absorb deeper and faster. It is also a solvent for other ingredients. As for the skin benefits, it helps to attract water and helps to make the skin softer.

Unlike many other “Glycols”, it is not harmful and that's why it is used in many products. It was approved by US FDA and US EPA for usage.

Propanediol is a good solvent, emollient and humectant. It helps to moisturize the skin and prevent moisture loss. In haircare products, it conditions hair and improves absorption of the product.

Phenoxyethanol is one of the most popular preservatives. It kills bacteria and makes the product live longer. Manufacturers like this ingredient because it can dissolve in any liquid, even in oils.

Another purpose of this component is the fixation of aromas in perfumery. Phenoxyethanol is also used as a strong antiseptic and a good antibacterial agent. It is widely used in dermatological cosmetics alongside natural antiseptics such as chamomile, sage, and calendula.

Like many other preservatives, Phenoxyethanol is a strong chemical. European Regulation (EC) No 1223/2009 allows this component in cosmetics at a maximum concentration of 1%. Clinical studies showed that the component doesn’t irritate the skin and doesn’t make it sensitive. According to the CLP Regulation (EC) No 1272/2008 it’s not toxic.