Rilastil Sun System Water Touch Matt SPF 50+ Versus Rilastil Sun System Water Touch Fluid SPF 50+

Buddleja Davidii Leaf Extract is native to China and Japan. It is also known as the Butterfly Bush as it provides food for butterflies. This ingredient is rich in antioxidants.

Butylene Glycol (or BG) is used within cosmetic products for a few different reasons:

Overall, Butylene Glycol is a safe and well-rounded ingredient that works well with other ingredients.

Cellulose Gum is a water-soluble polymer that comes from cellulose. It is used to change the texture of a product and to help stabilize emulsions.

As an emulsifier, cellulose gum specifically thicken the texture of water-based products.

Diglycerin is a humectant. It is derived from glycerin, which is naturally found in your skin.

As a humectant, it helps draw moisture to the skin from the air.

Glycerin (or glycerol) is a compound naturally found in your skin. It's a powerhouse humectant that pulls water into the stratum corneum.

Topically, glycerin does several things at once:

Hydroxyacetophenone is antioxidant with skin conditioning and soothing properties. It also boosts the efficiency of preservatives.

Though naturally occuring in Norwegian spruce needles, this ingredient is usually synthetically created.

Microcrystalline Cellulose is another name for refined wood pulp. It is used as an emulsifier and mattifying ingredient. As an emulsifier, it helps keep ingredients together.

This ingredient is an emollient with skin conditioning properties.

According to the manufacturer, it is light, non-greasy, spreadable, and has the ability to act as a "silicone alternative".

Parfum is a catch-all term for an ingredient or more that is used to give a scent to products.

Also called "fragrance", this ingredient can be a blend of hundreds of chemicals or plant oils. This means every product with "fragrance" or "parfum" in the ingredients list is a different mixture.

We don't have a description for Peucedanum Ostruthium Leaf Extract yet.

Pinus Pinaster Bark/Bud Extract is an antioxidant.

Potassium Sorbate is a preservative used to prevent yeast and mold in products. It is commonly found in both cosmetic and food products.

This ingredient comes from potassium salt derived from sorbic acid. Sorbic acid is a natural antibiotic and effective against fungus.

This ingredient comes from the "five-flavor" berry native to northeast Asia. It has skin conditioning properties and is rich in antioxidants.

In lab models, this ingredient displays antioxidant effects in keratinocytes (the main cells in the epidermis). Some studies also report tyrosinase inhibiting or skin brightening activity.

Sodium Benzoate is a preservative. It's used in both cosmetic and food products to inhibit the growth of mold and bacteria. It is typically produced synthetically.

Both the US FDA and EU Health Committee have approved the use of sodium benzoate. In the US, levels of 0.1% (of the total product) are allowed.

Sodium Hyaluronate is the salt form of hyaluronic acid. It is a long sugar chain that is naturally found in your skin, joints, and connective tissue that maintains hydration and elasticity.

In skincare, it works as a humectant. It pulls water from the environment and deeper layers of skin and binds it to the surface.

Sodium Hydroxide is also known as lye or caustic soda. It is used to adjust the pH of products; many ingredients require a specific pH to be effective.

In small amounts, sodium hydroxide is considered safe to use. However, large amounts may cause chemical burns due to its high alkaline.

Tetrasodium Glutamate Diacetate is a chelating agent. Chelating agents help prevent metal ions from binding to other ingredients. This helps prevent unwanted effects and reactions from a product. These metal ions may come from water and are found in miniscule amounts.

Tetrasodium Glutamate Diacetate can also help other preservatives be more effective.

Tocopheryl Acetate is AKA Vitamin E. It is an antioxidant and protects your skin from free radicals. Free radicals damage the skin by breaking down collagen.

One study found using Tocopheryl Acetate with Vitamin C decreased the number of sunburned cells.

Water. It's the most common cosmetic ingredient of all. You'll usually see it at the top of ingredient lists, meaning that it makes up the largest part of the product.

So why is it so popular? Water most often acts as a solvent - this means that it helps dissolve other ingredients into the formulation.