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Circadia Light Day Sunscreen Broad Spectrum SPF 37 Ingredients Explained

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Updated on February 12, 2024 Submitted by KateWinegar

Overview

What it is

Sunscreen with 43 ingredients that contains exfoliants, peptides and SPF

Suited For

It has ingredients that are good for dry skin and brightening skin

Free From

It doesn't contain any harsh alcohols, oils, parabens or sulfates

Fun facts

Circadia is from United States.

We independently verify ingredients and our claims are backed by peer-reviewed research. Does this product need an update? Let us know.

You should know

Here's our breakdown of the notable ingredients, benefits, and concerns we determined from the ingredients in this product. Click any item to learn more.

Notable Ingredients

Chemical UV Filter (3)
Exfoliators
Peptides

Benefits

Hydrating
Brightening

Concerns

May Worsen Oily Skin
Acne Trigger
Irritating (2)
Rosacea (2)
Eczema (2)

Ingredient Info

Click any item below to learn more and view relevant ingredients.
alcohol-free
silicon-free
fragrance-free
sulfate-free
paraben-free
oil-free
fungal-acne safe
reef-safe
eu-allergen-free
vegan
cruelty-free
spf rating
37

Ingredients Overview

Here's our quick-to-read summary of the ingredients in this product. Keep scrolling if you'd like to learn more about what each ingredient does!
Ingredient
Features
1
UV Absorber, UV Filter
Chemical UV Filter IconMay cause irritation IconMay worsen Rosacea Icon
2
UV Absorber, UV Filter
0 / 0
Chemical UV Filter IconMay cause irritation IconNon-Reef-Safe Icon
3
UV Absorber, UV Filter
Chemical UV Filter IconNon-Reef-Safe IconMay worsen Eczema Icon
4
Skin Conditioning, Solvent
5
Antimicrobial, Emollient, Skin Conditioning
6
Skin Conditioning
7
Humectant, Skin Conditioning, Skin Protecting, Solvent
0 / 0
Helps hydrate Dry Skin IconHelps brighten skin Icon
8
Abrasive, Absorbent
Exfoliant IconMay worsen Eczema IconMay worsen Rosacea Icon
9
10
Emollient, Skin Conditioning, Skin Protecting
1 / 0
Silicon Icon
11
Emollient, Skin Conditioning, Solvent
Silicon Icon
12
Emulsifying
13
0 / 0
Not safe for Fungal Acne Icon
14
Emulsion Stabilising, Solvent
15
Emollient, Emulsifying, Skin Conditioning
Not safe for Fungal Acne Icon
16
Emulsion Stabilising, Perfuming, Skin Conditioning
Fragrance Icon
17
Astringent, Perfuming, Skin Conditioning, Tonic
Fragrance Icon
18
Skin Conditioning
19
Masking, Perfuming
Fragrance Icon
20
Emollient, Emulsifying, Skin Conditioning
21
Skin Conditioning
22
Skin Conditioning
Peptide Icon
23
Skin Conditioning, Skin Protecting, Smoothing
24
Antioxidant
Antioxidant Icon
25
Emulsion Stabilising
26
Cleansing, Perfuming, Skin Conditioning, Tonic
Fragrance Icon
27
Emollient, Humectant, Skin Conditioning
28
29
Emulsifying, Emulsion Stabilising, Gel Forming, Skin Conditioning
30
Emollient, Skin Conditioning, Solvent
Silicon Icon
31
Masking, Skin Conditioning
32
Emulsifying
3 / 0
Bad for Acne Prone Skin IconNot safe for Fungal Acne Icon
33
Emollient, Emulsifying
1 / 0
Not safe for Fungal Acne Icon
34
Emollient
Not safe for Fungal Acne Icon
35
Emulsifying, Skin Conditioning, Solvent
0-2 / 0-1
36
Emollient, Skin Conditioning, Solvent
37
38
Emulsifying
0 / 0
May worsen Oily Skin IconNot safe for Fungal Acne Icon
39
Preservative
Preservative Icon
40
Humectant
41
Masking, Preservative
Preservative Icon
42
Perfuming, Solvent
Fragrance Icon
43
Perfuming
Fragrance IconMay cause irritation IconEU Allergen Icon

Ingredients Explained

This product contains 43 ingredients. Click on any ingredient to learn more about it
1
What it does: UV Absorber, UV Filter
Community Rating: Very Disliked

Also known as Avobenzone, this ingredient is a chemical sunscreen filter that provides protection in the UV-A range.

Avobenzone is globally approved and is the most commonly used UV-A filter in the world.

Studies have found that avobenzone becomes ineffective when exposed to UV light (it is not photostable; meaning that it breaks down in sunlight). Because of this, formulations that include avobenzone will usually contain stabilizers such as octocrylene.

However, some modern formulations (looking at you, EU!) are able to stabilize avobenzone by coating the molecules.

Avobenzone does not protect against the UV-B range, so it's important to check that the sunscreen you're using contains other UV filters that do!

The highest concentration of avobenzone permitted is 3% in the US, and 5% in the EU.

Learn more about Butyl Methoxydibenzoylmethane
2
What it does: UV Absorber, UV Filter
Community Rating: Very Disliked

Ethylhexyl Methoxycinnamate is an organic compound that provides UVB protection. It often goes by the more common name of octinoxate. It is created from methoxycinnamic acid and 2-ethylhexanol.

Ethylhexyl Methoxycinnamate absorbs UVB rays with wavelengths between 280-320 nm. UV absorbers protect your skin by using chemical reactions to convert UV rays into heat and energy.

UVB (290-320 nm) rays emit more energy than UVA rays. They are capable of damaging DNA, causing sunburns and are thought to be linked to skin cancer.

The state of Hawaii has banned sunscreens containing octinoxate due to its potential impact on coral reefs. More research is needed to bridge gaps in this research. The European Union allows higher levels of octinoxate in sunscreens than the US and Australia.

Ethylhexyl Methoxycinnamate is oil soluble. It is not stable and may lose efficacy when exposed to sunlight.

Learn more about Ethylhexyl Methoxycinnamate
3
What it does: UV Absorber, UV Filter
Community Rating: Very Disliked

Octocrylene protects skin from sun damage. It absorbs UV-B with peak absorption of 304 nm. It is a common sunscreen ingredient and often paired with avobenzone, a UVA filter. This is because octocrylene stabilizes other sunscreen ingredients by protecting them from degradation when exposed to sunlight. Octocrylene is a photostable ingredient and loses about 10% of SPF in 95 minutes.

Octocrylene also acts as an emollient, meaning it helps skin retain moisture and softens skin. It is oil-soluble and hydrophobic, enhancing water-resistant properties in a product.

Those who are using ketoprofen, a topical anti-inflammatory drug, may experience an allergic reaction when using octocrylene. It is best to speak with a healthcare professional about using sunscreens with octocrylene.

The EU allows a maximum of these concentrations:

Learn more about Octocrylene
4
What it does: Skin Conditioning, Solvent
Community Rating: Loved

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.

You'll also recognize water as that liquid we all need to stay alive. Talk about multi-purpose! If you see this, drink a glass of water. Stay hydrated!

Learn more about Water
5
What it does: Antimicrobial, Emollient, Skin Conditioning
Community Rating: Disliked

C12-15 Alkyl Benzoate is made up of Benzoic Acid and long chain alcohols. It has a low molecular weight.

C12-15 Alkyl Benzoate is an emollient and texture enhancer. Due to its solubility, it is often used in sunscreens to help evenly distribute active ingredients.

As an emollient, C12-15 Alkyl Benzoate helps soften and hydrate your skin. Emollients create a film on your skin that traps moisture within.

This ingredient has been reported to cause eye irritation.

Learn more about C12-15 Alkyl Benzoate
6
What it does: Skin Conditioning

We don't have a description for Ethylhexyl Methoxycrylene.

7
What it does: Humectant, Skin Conditioning, Skin Protecting, Solvent
Community Rating: Loved

Glycerin is already naturally found in your skin. It helps moisturize and protect your skin.

A study from 2016 found glycerin to be more effective as a humectant than AHAs and hyaluronic acid.

As a humectant, it helps the skin stay hydrated by pulling moisture to your skin. The low molecular weight of glycerin allows it to pull moisture into the deeper layers of your skin.

Hydrated skin improves your skin barrier; Your skin barrier helps protect against irritants and bacteria.

Glycerin has also been found to have antimicrobial and antiviral properties. Due to these properties, glycerin is often used in wound and burn treatments.

In cosmetics, glycerin is usually derived from plants such as soybean or palm. However, it can also be sourced from animals, such as tallow or animal fat.

This ingredient is organic, colorless, odorless, and non-toxic.

Glycerin is the name for this ingredient in American English. British English uses Glycerol/Glycerine.

Learn more about Glycerin
8
What it does: Abrasive, Absorbent
Community Rating: Disliked

Silica is a mineral naturally found in our skin. It helps to thicken and smooth the texture of a product. It also acts as an agent for other ingredients by increasing the absorption of other ingredients into the skin.

Silica is often used for absorption and can help reduce shine when products are applied. Silica occurs in naturally in materials like clay and sandstone, and it can also be produced synthetically.

Silica is present naturally within the skin during collagen production and when reducing inflammation.

Learn more about Silica
9

We don't have a description for Vp/Eicosene Copolymer.

10
What it does: Emollient, Skin Conditioning, Skin Protecting
Community Rating: Very Disliked

Dimethicone is a silicone used for making products smooth and silky. It also has the added benefit of sealing in hydration. The amount of dimethicone found in beauty products is considered safe and non-comedogenic, meaning it won't clog pores.

Dimethicone has been found increase absorption in skin, boosting the benefits of other ingredients. While there is concern for the safety of dimethicone, the levels used in skincare are safe for use.

11
What it does: Emollient, Skin Conditioning, Solvent
Community Rating: Disliked

Cyclopentasiloxane is a silicone used to improve texture and trap moisture. An easier name for this is D5.

D5 is considered lightweight and volatile. Volatile means it evaporates quickly after application. Once evaporated, D5 leaves a thin barrier that helps keep skin hydrated.

D5 is an emollient. Emollients help soften the skin and prevent water loss. Silicones create a silky texture in products. D5 helps other ingredients become more spreadable.

Studies show D5 is safe to use in skincare products. We recommend speaking with a skincare professional if you have concerns.

Learn more about Cyclopentasiloxane
12
What it does: Emulsifying

Potassium Cetyl Phosphate is the potassium salt of a mixture. This mixture consists of the esters from phosphoricacid and cetyl alcohol.

Potassium Cetyl Phosphate is an emulsifier and cleansing agent. Emulsifiers help stabilize a product. It does this by preventing certain ingredients from separating.

As a cleansing agent, Potassium Cetyl Phosphate helps gather oils, dirts, and pollutants from your skin. This makes it easier to rinse them away with water.

Learn more about Potassium Cetyl Phosphate
13
What it does:
Community Rating: Very Disliked

Peg-100 Stearate is an emollient and emulsifier. PEGS are a hydrophilic polyether compound . There are 100 ethylene oxide monomers in Peg-100 Stearate. Peg-100 Stearate is polyethylene glycol ester of stearic acid.

Peg-100 Stearate helps keep skin soft by trapping moisture in. It helps prevent oil and water from separating in a product. By binding oil and water, it helps remove dirt and oil to be rinsed away.

14
What it does: Emulsion Stabilising, Solvent

We don't have a description for Dimethyl Capramide.

15
What it does: Emollient, Emulsifying, Skin Conditioning

Hydrogenated Palm Glycerides isn't fungal acne safe.

16
What it does: Emulsion Stabilising, Perfuming, Skin Conditioning
Community Rating: Very Disliked

Citrus Aurantium Dulcis Peel Extract comes from the peels of the bitter orange. This orange is native to Southeast Asia. It is commonly used in foods such as marmalade.

Citrus peels are often made up of mainly limonene. Limonene is a fragrance with a citrus scent. They also contain flavonoids, which have anti-inflammatory properties.

17
What it does: Astringent, Perfuming, Skin Conditioning, Tonic

Citrus Grandis Peel Extract is a fragrance.

18
What it does: Skin Conditioning

We don't have a description for Prunus Armeniaca Fruit Extract.

19
What it does: Masking, Perfuming

Aniba Rosaeodora Wood Extract is a fragrance.

20
What it does: Emollient, Emulsifying, Skin Conditioning
Community Rating: Disliked

Lecithin is a term for a group of substances found in plants, animals, and humans. They are made up of mixture of fatty acids. These fatty acids usually are a mixture of phosphoric acid's choline ester connected to stearic, oleic, and palmitic acids. Most lecithins are created from plant ingredients scuh as sunflower.

Lecithin is an emollient. Emollients help soften the skin and creates a barrier to keep moisture in.

As an emulsifier, it also helps prevent water and oil ingredients from separating. Lecithin can help ingredients be better absorbed by the skin. The phospholipids in Lecithin can produce liposomes. Liposomes help other ingredients get through the skin barrier.

Learn more about Lecithin
21
What it does: Skin Conditioning

We don't have a description for Vitis Vinifera Fruit Cell Extract.

22
What it does: Skin Conditioning

Diaminopropionoyl Tripeptide-33 is a peptide.

23
What it does: Skin Conditioning, Skin Protecting, Smoothing
Community Rating: Liked

Vanilla Planifolia Fruit Extract comes from the vanilla orchid native to central America. It is a skin-soothing ingredient.

This ingredient is skin-soothing and contains polyphenols that give it antioxidant properties.

This ingredient is not known to sensitize or irritate skin (unlike Vanilla Tahitensis).

Vanilla tahitensis has shown to irritate skin in low amounts!

Learn more about Vanilla Planifolia Fruit Extract
24
What it does: Antioxidant

Dimethylmethoxy Chromanol is an antioxidant.

25

We don't have a description for Acrylamide/Sodium Acryloyldimethyltaurate Copolymer.

26
What it does: Cleansing, Perfuming, Skin Conditioning, Tonic

Citrus Aurantifolia Peel Extract is a fragrance.

27
What it does: Emollient, Humectant, Skin Conditioning
Community Rating: Liked

Caprylyl Glycol is a humectant and emollient, meaning it attracts and preserves moisture.

It is a common ingredient in many products, especially those designed to hydrate skin. The primary benefits are retaining moisture, skin softening, and promoting a healthy skin barrier.

Though Caprylyl Glycol is an alcohol derived from fatty acids, it is not the kind that can dry out skin.

This ingredient is also used as a preservative to extend the life of products. It has slight antimicrobial properties.

Learn more about Caprylyl Glycol
28
What it does:
Community Rating: Disliked

Disodium EDTA plays a role in making products more stable by aiding other preservatives.

It is a chelating agent, meaning it neutralizes metal ions that may be found in a product.

Disodium EDTA is a salt of edetic acid and is found to be safe in cosmetic ingredients.

Learn more about Disodium EDTA
29
What it does: Emulsifying, Emulsion Stabilising, Gel Forming, Skin Conditioning
Community Rating: Disliked

Xanthan gum is used as a stabilizer and thickener within cosmetic products. It helps give products a sticky, thick feeling - preventing them from being too runny.

On the technical side of things, xanthan gum is a polysaccharide - a combination consisting of multiple sugar molecules bonded together.

Xanthan gum is a pretty common and great ingredient. It is a natural, non-toxic, non-irritating ingredient that is also commonly used in food products.

Learn more about Xanthan Gum
30
What it does: Emollient, Skin Conditioning, Solvent
Community Rating: Disliked

Cyclohexasiloxane is a type of silicone more commonly known as D6. It is an emollient and solvent.

Cyclohexasiloxane is used to evenly distribute ingredients throughout the product. When applied to the skin, Cyclohexasiloxane evaporates and leaves behind a silky feel.

As an emollient, it can help the skin feel soft and hydrated. It is also used to reduce frizz in hair products.

Learn more about Cyclohexasiloxane
31
What it does: Masking, Skin Conditioning
Community Rating: Mixed

Caprylic/Capric Triglyceride is an emollient, solvent, and texture enhancer. It is considered a skin-softener by helping the skin prevent moisture loss.

Within a product, Caprylic Triglyceride can thicken the product and make spreadability easier by dissolving clumping compounds. An added benefit of Caprylic Triglyceride is its antioxidant properties.

Caprylic Triglyceride is made by combining glycerin with coconut oil, forming a clear liquid. Caprylic Triglyceride has not been found to be toxic for human use in concentrations under 50%.

While there is an assumption Caprylic Triglyceride can clog pores due to it being derived from coconut oil, there is no research supporting this.

Learn more about Caprylic/Capric Triglyceride
32
What it does: Emulsifying
Community Rating: Very Disliked

Sorbitan Oleate is created from compounds in oleic acid and sorbitol. It is used to stabilize a product by preventing ingredients from separating.

Emulsifiers help keep ingredients together, such as oils and water.

Sorbitan Oleate may not be fungal acne safe. It can also worsen oily skin.

Learn more about Sorbitan Oleate
33
What it does: Emollient, Emulsifying
Community Rating: Disliked

Glyceryl Stearate is a mix of glycerin and stearic acid.

Glyceryl Stearate is used to stabilize the mixing of water and oil ingredients. By preventing these ingredients from separating, it can help elongate shelf life. It can also help thicken the product's texture.

As an emollient, it helps soften skin and supports barrier-replenishing ingredients.

In cosmetics, Glyceryl Stearate is often made from vegetable oils or synthetically produced. The human body also creates Glyceryl Stearate naturally.

Learn more about Glyceryl Stearate
34
What it does: Emollient

Glyceryl Distearate isn't fungal acne safe.

35
What it does: Emulsifying, Skin Conditioning, Solvent
Community Rating: Disliked

Hexylene Glycol is a surfactant. Glycols are a class of alcohols. Hexylene Glycol is a surfactant and emulsifier.

As a surfactant, Hexylene Glycol helps gather dirt and oil on your skin to be washed away.

As an emulsifier, Hexylene Glycol helps keep water and oil together. This prevents them from separating in a product. Hexylene Glycol also thins out the texture of a product by lessening viscosity.

Hexylene Glycol has a small molecular weight.

Learn more about Hexylene Glycol
36
What it does: Emollient, Skin Conditioning, Solvent
Community Rating: Mixed

Isohexadecane is added to enhance texture, emulsify, and to help cleanse. It is an isoparrafin. It is a component of petrolatum.

Due to its large size, Isohexadecane is not absorbed by the skin. Instead, it sits on top and acts as an emollient. Emollients help keep your skin soft and smooth by trapping moisture within.

Isohexadecane is often used in products designed to help oily skin. It is lightweight and non-greasy while helping to moisturize. When mixed with silicones, it gives a product a silky feel.

Learn more about Isohexadecane
37
What it does:
Community Rating: Disliked

We don't have a description for Polysilicone-11.

38
What it does: Emulsifying
Community Rating: Very Disliked

Polysorbate 80 is a surfactant and emulsifier. It is used to keep ingredients together, and prevent oils and waters from separating.

It is made from polyethoxylated sorbitan and oleic acid. This ingredient can be found in cosmetics, foods, and medicine. It is water-soluble.

Polysorbate 80 may not be fungal acne safe.

Learn more about Polysorbate 80
39
What it does: Preservative
Community Rating: Very Disliked

Phenoxyethanol is a preservative that has germicide, antimicrobial, and aromatic properties. Studies show that phenoxyethanol can prevent germ and microbial growth. By itself, it has a scent that is similar to that of a rose.

It's often used in formulations along with Caprylyl Glycol to preserve the shelf life of products.

40
What it does: Humectant

We don't have a description for Isomalt.

41
What it does: Masking, Preservative
Community Rating: Disliked

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 benzoate works as a preservative by inhibiting the growth of bacteria inside of cells. It prevents the cell from fermenting a type of sugar using an enzyme called phosphofructokinase.

Sodium Benzoate is the salt of benzoic acid. Foods containing sodium benzoate include soda, salad dressings, condiments, fruit juices, wines, and snack foods.

Studies for using ascorbic acid and sodium benzoate in cosmetics are lacking, especially in skincare routines with multiple steps.

We always recommend speaking with a professional, such as a dermatologist, if you have any concerns.

Learn more about Sodium Benzoate
42
What it does: Perfuming, Solvent
Community Rating: Very Disliked

Limonene is a fragrance that adds scent and taste to a formulation.

It's found in the peel oil of citrus fruits and other plants such as lavender and eucalyptus. The scent of limonene is generally described as "sweet citrus".

Limonene acts as an antioxidant, meaning it helps neutralize free radicals.

When exposed to air, oxidized limonene may sensitize the skin. Because of this, limonene is often avoided by people with sensitive skin.

The term 'fragrance' is not regulated in many countries. In many cases, it is up to the brand to define this term. For instance, many brands choose to label themselves as "fragrance-free" because they are not using synthetic fragrances. However, their products may still contain ingredients such as essential oils that are considered a fragrance.

Learn more about Limonene
43
What it does: Perfuming
Community Rating: Very Disliked

Linalool is a fragrance and helps add scent to products. It's derived from common plants such as cinnamon, mint, citrus, and lavender.

Linalool has the same effect as Limonene when exposed to air. Oxidized linalool can cause allergies and skin sensitivity.

Linalool has a scent that is floral, spicy tropical, and citrus-like.

Learn more about Linalool
Embed Ingredients

Here's what our community thinks of the 43 ingredients in this product ✨

9% are loved or liked
5% have mixed ratings
51% are disliked or very disliked
35% have no rating yet

When to use

Here's some more info on how this product is used by our community.

Directions

Apply liberally (about 2 g or 1/3 teaspoon) to face, neck and ears 15 minutes before sun exposure.

Apply liberally (about 2 g or 1/3 teaspoon) to face, neck and ears 15 minutes before sun exposure.

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The data we've presented on this page has been verified by a member of the SkinSort Team.

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