What are the most common ingredients used in sunscreens?

To monitor your Vitamin D levels, order a Welzo at-home Vitamin D Blood Test today!
The Ultraviolet radiation emitted from the Sun may be classified into three types, i.e., Ultraviolet A (UV A), Ultraviolet B (UV B), and Ultraviolet C (UV C).
Ultraviolet A: Most of the ultraviolet radiations that affect the skin is UVA, which causes tanning, discolouration, and ageing of the skin. It is known to have the ability to cause skin cancers and to have a deeper penetrating power.
Ultraviolet B: Although UV B radiation does not penetrate the skin as deeply as UV A, they are responsible for causing skin cancers.
Ultraviolet C: This type of ultraviolet radiation is the most harmful. But you need not worry, as it is completely filtered off by the Earth’s atmosphere.
One may try to protect oneself from the harmful effects of UV rays by avoiding direct exposure when the sun’s rays are intense, i.e., between 10 am to 4 pm. At such times, it’s best to be under shade whenever possible.
Wearing light-coloured clothes with long sleeves and long pants also helps protect the skin to some degree. Using lip balms with SPF protection is also advised. Sunglasses may be used to protect the eyes from the Sun’s harmful glare. For a complete selection of dermatologist-approved skincare essentials, including daily SPF options and recovery serums, explore the full Skin Care Collection.
With the negative effects of Ultraviolet radiation from Sunlight, came the age of Sunscreens. Sunscreens have been the big go-to product when it comes to Sun Safety. Protecting the skin from the harmful effects of sunlight, sunscreens have been in the market for decades now. With knowledge of the harmful effects of ultraviolet radiation, most people are aware of the necessity of using good sunscreen to protect their skin. Yet, you may often wonder about the contents of the sunscreen you are using and whether the product is doing more damage, rather than good, to you. When choosing a product, consider using dermatologically approved formulas such as the Uvistat Sun Cream SPF50 UVA 3 125ml, which offers high UVA and UVB protection without added fragrances, making it ideal for sensitive skin. When choosing a sunscreen, make sure it meets safety criteria and is suited to your skin type. You can browse a full selection of medical-grade and mineral-based formulas in the Sunscreen Skincare Collection.
Topical Sunscreens may be broadly classified as –
1. Organic or Chemical Sunscreens
These protect the skin by absorbing harmful ultraviolet radiation. A highly practical daily option in this category is the Riemann P20 Sun Cream (Spray) 100ml - SPF15, which is known for long-lasting protection in a quick-drying formula.
2. Inorganic or Physical Sunscreens
These act as a physical barrier by scattering and deflecting UV radiation. For those looking for a mineral-based alternative, Badger Sunscreen Clear Zinc SPF 30 82g is a great example of a reef-safe, eco-conscious choice with zinc oxide as its active ingredient.
They are also known as synthetic sunscreens and protect the skin by absorbing harmful ultraviolet radiation.
They are further divided and available as follows:
Sunscreens that protect against UVA
Sunscreens that offer protection against UVB
Broad spectrum Sunscreens that protect against both UVA and UVB.
Common Ingredients in Sunscreens
Avobenzone
A UVA filter used in chemical sunscreens to block long-wave radiation. Since avobenzone is not photostable, it's usually combined with stabilisers or other ingredients like octocrylene.
Octisalate
Known for its water-resistant properties, octisalate is a UVB filter that’s often used to stabilise other active ingredients.
Titanium Dioxide
Found in physical sunscreens, it reflects UV rays from the skin. Products like MooGoo Sunscreen SPF40 120g include this ingredient for broad-spectrum, non-irritating protection ideal for dry or reactive skin.
Zinc Oxide
Another staple in mineral sunscreens, zinc oxide provides comprehensive UV protection and soothes irritated skin. It's the key ingredient in the Attitude Sunly Sunscreen Stick Unscented SPF 30 60g, a portable, child-safe, and fragrance-free formula.
Oxybenzone
A broad-spectrum filter often found in both chemical and combination sunscreens. Though effective, it’s known to cause allergic reactions in some individuals and should be used cautiously.
Octinoxate
This UVB filter is commonly used for anti-ageing benefits but may have hormone-disrupting properties, making it a controversial ingredient.
By understanding the types of ultraviolet radiation and choosing the right sun protection, like physical sunscreens for sensitive skin or long-wear sprays for outdoor activity, you can enjoy the benefits of sunlight while minimising its risks.
Physical or Inorganic Sunscreens (Mineral Sunscreen)
Mineral sunscreens have a sun-blocking effect on the skin. They act as a physical barrier by scattering and deflecting harmful ultraviolet radiations from the sun. They are generally broad-spectrum sunscreens that include zinc oxide and titanium dioxide as their active ingredients. Inorganic sunscreens are usually recommended for sensitive skin types.
Avobenzone is a commonly used UVA filter in a chemical sunscreen. It blocks the full spectrum of UVA rays by absorbing harmful rays and releasing them as heat from the body. Avobenzone is usually used in combination with other ingredients as it is not stable on its own when exposed to sunlight for long durations.
One of the most common ingredients present in sunscreens, lotions, and topical creams, Octisalate is better known for its water-proof properties. It is often used in combination with avobenzone in chemical sunscreens and helps to make the sunscreens effective for a longer period. It helps to filter UVB rays and thus helps prevent redness and burning sensation of the skin.
3. Titanium Dioxide
Titanium dioxide is considered to be one of the safest ingredients present in physical sunscreens. A broad-spectrum UV filter, it acts as a physical barrier blocking UV rays from the skin. It is one of the most stable ingredients that occur naturally in the environment or may also be manufactured synthetically. Titanium dioxide is often used as a whitening agent in many cosmetic and moisturizing agents. Its inert and non-irritant properties make it a safe product for children and people with sensitive skin.
Several properties of zinc oxide are quite similar to titanium dioxide. Present in physical or mineral sunscreens, it helps to create a layer over the skin, and thus protects the skin from Both UVA rays and UVB rays. Its properties of photostability and long-lasting effects on the skin are much superior to Avobenzone and titanium dioxide. Zinc oxide acts as an effective emollient and is a common ingredient in creams used to treat rashes and inflammatory reactions. Its drawbacks include leaving a white cast on the skin and limited protective action on the skin.
Present in both physical and chemical sunscreens, Oxybenzone is a broad-spectrum UV filter that is commonly found in sunscreens. It is effective when used in conjunction with other ingredients present in sunscreens. The combined effect of different ingredients increases the duration of its protective function. Oxybenzone is a notorious ingredient as it is known to cause allergic and inflammatory reactions as well as hormonal imbalances. As it is absorbed by the skin, one is recommended to use this ingredient with caution.
Present in chemical sunscreens, Octinoxate is known to protect from UVB rays. It is often used in combination with UVA filters, thus providing broad-spectrum protection. Although octinoxate is known to prevent the effects of ageing caused by harmful UV rays, it may also damage cells of the skin and result in early ageing of the skin. It is also known to cause hormonal imbalance in the body and should therefore be used with caution.
Plus get the inside scoop on our latest content and updates in our monthly newsletter.