
Jack Black Oil-Free Sun Guard SPF 45 Sunscreen is a product with 22 ingredients: Octinoxate, Octisalate, Zinc Oxide, Water, Cyclopentasiloxane, Ethylhexyl Isononanoate, Butylene Glycol, Lauryl PEG-9 Polydimethylsiloxyethyl Dimethicone, Calendula Officinalis (Pot Marigold) Flower Extract, Peucedanum Ostruthium Leaf Extract and 12 more.
Contains: Vitamins - Ascorbyl Palmitate (Vitamin C Palmitate), Retinyl Palmitate (Vitamin A Palmitate); Antioxidant - Ascorbyl Palmitate (Vitamin C Palmitate);
Organic score: 23% natural, 59% chemical. Vegan - No; Cruelty free - No; Reef safe - No;
Positive effects
Concerns
INCI - Full Breakdown
Octinoxate is an effective sun protector that absorbs UV-B rays mostly. That means it can help to protect the skin from burns and from cancer. It’s also a solvent for other sunscreen components. This helps manufacturers to make products less oily.

Zinc Oxide is a great physical sunscreen, meaning it deflects the UV rays. It’s the only natural mineral sun protector recommended by the FDA for babies. It’s good for sensitive skin because it’s less irritating than chemical sunscreens.
It has very nice spectrum protection. It helps to protect from UVA I, UVA II, and UVB and nowadays it’s the broadest range of sunscreen used in cosmetics. In other words, it’s brilliant in its league.
The negative side is that it can feel heavy on the skin. It can leave a slight whitish tint on the surface of the skin and some people may not like this. Keep in mind that it’s relatively easy to wash off, so it’s better to use water-resistant sunscreens if you are swimming.
Water is a great solvent. It’s neutral and doesn’t provide any strong positive or negative effects. It just helps components to mix better and to transport active components.
Cyclopentasiloxane is a fluid silicone. It’s non-greasy and doesn’t have any scent or color. It evaporates pretty fast which makes this ingredient essential when it comes to making products that have to dry quickly. It also gives a nice silky feeling when you apply the product to the skin and hair. It leaves a thin film that protects the skin after evaporation.
Cyclopentasiloxane is chemically neutral, meaning it doesn’t react with other components.
Ethylhexyl Isononanoate is a softening agent that forms a thin protecting film on your skin and helps it to keep water. The component also improves the texture and feeling of the product. Ethylhexyl Isononanoate is also used in haircare products helping your hair slide better and making combing process easier.

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.

Calendula Officinalis Flower Extract is used in medicine for hundreds of years. A small study shows that it can make skin firmer and more hydrated. There was also a slight improvement in elasticity of the skin. The component also heals wounds.
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