Explore Routine Login

Overview

What they are

These products are both reef safe serums. They have a total of 10 ingredients in common

Cool Features

They both contain hyaluronic acid, Vitamin C and Vitamin E

Suited For

They're both likely to be good for anti aging, dry skin, brightening skin, dark spots and better texture

Free From

They both do not contain any common allergens or parabens

What's Inside

They both contain harsh alcohols, fragrances and silicones

We independently verify ingredients, and our claims are backed by peer-reviewed research. Spot a product that needs an update? Let us know.

L'Oreal Youth Code Dark Spot Corrector Serum

Ingredient Info

Click any item below to learn more and see relevant ingredients

At a glance

Click on any of the items below to learn more

Notable Ingredients

Benefits

Concerns

Notable Ingredients

Benefits

Concerns

Ingredients Side-by-side

found in both products
Youth Code Dark Spot Corrector Serum
Water Skin Conditioning, Solvent

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.

Glycerin Humectant, Skin Conditioning, Skin Protecting
0 / 0 Helps hydrate Dry Skin IconHelps brighten skin Icon
2 Benefits

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

0 Com. / 0 Irr.
Butylene Glycol Humectant, Masking, Skin Conditioning
1 / 0

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

1 Com. / 0 Irr.
Dimethicone Emollient, Skin Conditioning, Skin Protecting
1 / 0 Silicon Icon
SiliconSilicon Icon

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.

1 Com. / 0 Irr.
Very Disliked Full details ->
Niacinamide Smoothing
Niacinamide IconGood for Oily Skin IconHelps reduce Skin Redness IconGood for Minimizing Pores IconGood for Dark Spots IconHelps fight Acne IconHelps brighten skin Icon
NiacinamideNiacinamide Icon 6 Benefits

Niacinamide has emerged as an all-star ingredient due to its many benefits.

C12-15 Alkyl Benzoate Antimicrobial, Emollient, Skin Conditioning

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

Disliked Full details ->
Alcohol Denat. Antimicrobial, Astringent, Masking
Alcohol IconCan worsen Dry Skin IconMay worsen Oily Skin IconMay cause irritation IconMay worsen Eczema IconMay worsen Rosacea Icon
AlcoholAlcohol Icon 5 Concerns

Alcohol Denat. is an alcohol with a denaturant property. It is created by mixing ethanol with other additives.

Very Disliked Full details ->
Ascorbyl Glucoside Antioxidant
Vitamin C IconAntioxidant IconHelps reduce Skin Redness IconGood for Skin Texture IconHelps with Anti-Aging IconGood for Dark Spots IconGood for Scar Healing IconHelps brighten skin Icon
Vitamin CVitamin C Icon AntioxidantAntioxidant Icon 6 Benefits

Ascorbyl Glucoside is a stable form of Vitamin C. It is created by combining glucose from starch.

Hydroxyethylpiperazine Ethane Sulfonic Acid Buffering

We don't have a description for Hydroxyethylpiperazine Ethane Sulfonic Acid.

C13-14 Isoparaffin Emollient, Solvent
May worsen Oily Skin IconNot safe for Fungal Acne Icon
2 Concerns

C13-14 Isoparaffin is created from petroleum-based mineral oils. It is an emollient and helps thicken a product.

Very Disliked Full details ->
Peg-100 Stearate
0 / 0 Not safe for Fungal Acne Icon
Not safe for Fungal AcneNot safe for Fungal Acne Icon

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.

0 Com. / 0 Irr.
Very Disliked Full details ->
Stearic Acid Cleansing, Emulsifying, Emulsion Stabilising
2-3 / 0 May worsen Oily Skin IconNot safe for Fungal Acne Icon
2 Concerns

Stearic Acid is a fatty acid. It is an emollient, emulsifier, and texture enhancer.

2-3 Com. / 0 Irr.
Very Disliked Full details ->
Potassium Hydroxide Buffering

Potassium hydroxide is commonly known as caustic potash. It is used to fix the pH of a product or as a cleaning agent in soap. In cleansers, it is used for the saponification of oils.

Very Disliked Full details ->
Glyceryl Stearate Emollient, Emulsifying
1 / 0 Not safe for Fungal Acne Icon
Not safe for Fungal AcneNot safe for Fungal Acne Icon

Glyceryl Stearate is a mix of glycerin and stearic acid.

1 Com. / 0 Irr.
Very Disliked Full details ->
Triethanolamine Buffering, Emulsifying, Masking
2 / 0

Triethanolamine is an emulsifier and pH adjuster. It is created using ethylene oxide and ammonia. This gives Triethanolamine a nitrogen core and a similar scent to ammonia.

2 Com. / 0 Irr.
Very Disliked Full details ->
Sodium Citrate Buffering, Masking

Sodium Citrate is the sodium salts of citric acid. In skincare, it is used to alter pH levels and acts as a preservative.

Sodium Hyaluronate Humectant, Skin Conditioning
0 / 0 Hyaluronic Acid Icon
Hyaluronic AcidHyaluronic Acid Icon

Sodium Hyaluronate is hyaluronic acid's salt form. It is commonly derived from the sodium salt of hyaluronic acid.

0 Com. / 0 Irr.
Palmitic Acid Emollient, Emulsifying
2 / 0 May worsen Oily Skin IconNot safe for Fungal Acne Icon
2 Concerns

Palmitic Acid is a fatty acid found in our skin. In cosmetics, it is usually derived from palm oil. It is a cleanser, emollient, and emulsifier.

2 Com. / 0 Irr.
Very Disliked Full details ->
Adenosine Skin Conditioning
Helps with Anti-Aging IconGood for Scar Healing Icon
2 Benefits

Adenosine is in every living organism. It is one of four components in nucleic acids that helps store our DNA.

Disodium EDTA

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

Disliked Full details ->
Laureth-7 Emulsifying

Laureth-7 is created by the ethoxylation of lauryl alcohol using ethylene oxide. Lauryl alcohol is a fatty alcohol with hydrating properties.

Disliked Full details ->
Xanthan Gum Emulsifying, Emulsion Stabilising, Gel Forming

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.

Disliked Full details ->
Oxothiazolidinecarboxylic Acid Skin Conditioning

We don't have a description for Oxothiazolidinecarboxylic Acid.

Unknown Full details ->
Castanea Sativa Bud Extract Skin Protecting

We don't have a description for Castanea Sativa Bud Extract.

Unknown Full details ->
Ethylhexyl Hydroxystearate Emollient
Not safe for Fungal Acne Icon
Not safe for Fungal AcneNot safe for Fungal Acne Icon

Ethylhexyl Hydroxystearate isn't fungal acne safe.

Disliked Full details ->
Polyacrylamide

Polyacrylamide is a synthetic polymer. It is used to stabilize products and bind ingredients. When hydrated, Polyacrylamide forms a soft gel.

Disliked Full details ->
Cetyl Alcohol Emollient, Emulsifying, Emulsion Stabilising
2 / 2 Fatty Alcohol Icon
Fatty AlcoholFatty Alcohol Icon

Cetyl Alcohol is a fatty alcohol. Fatty Alcohols are most often used as an emollient or to thicken a product.

2 Com. / 2 Irr.
Very Disliked Full details ->
Tocopheryl Acetate Antioxidant, Skin Conditioning
0 / 0 Vitamin E IconAntioxidant IconHelps brighten skin Icon
Vitamin EVitamin E Icon AntioxidantAntioxidant Icon Helps brighten skinHelps brighten skin Icon

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.

0 Com. / 0 Irr.
Phenoxyethanol Preservative
Preservative Icon
PreservativePreservative Icon

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

Very Disliked Full details ->
CI 77163 Cosmetic Colorant

This synthetic powder is used to add a pearly/white color in cosmetics.

Disliked Full details ->
Limonene Perfuming, Solvent
Fragrance Icon
FragranceFragrance Icon

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

Very Disliked Full details ->
Parfum Masking, Perfuming
Fragrance IconMay worsen Eczema IconMay worsen Rosacea Icon
FragranceFragrance Icon 2 Concerns

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

Very Disliked Full details ->
The Dewy Serum Resurfacing and Plumping Treatment
Camellia Sinensis Leaf Perfuming, Skin Conditioning
Fragrance IconHelps with Anti-Aging Icon
FragranceFragrance Icon Helps with Anti-AgingHelps with Anti-Aging Icon

Camellia Sinensis Leaf is the leaf of the tea plant. These leaves are used to make white, oolong, green, and black tea.

Glycerin Humectant, Skin Conditioning, Skin Protecting
0 / 0 Helps hydrate Dry Skin IconHelps brighten skin Icon
2 Benefits

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

0 Com. / 0 Irr.
Propanediol Solvent

Propanediol helps absorb ingredients into your skin, boosting their benefits. It can act as an emollient, making your skin softer. Propanediol can help products last longer by boosting the properties of preservatives within the formulation.

Water Skin Conditioning, Solvent

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.

Squalane Emollient, Skin Conditioning
1 / 0 Helps hydrate Dry Skin Icon
Helps hydrate Dry SkinHelps hydrate Dry Skin Icon

Squalane is an emollient that helps the skin hold onto moisture. It's an oily liquid that occurs naturally in certain types of fish and plant oils.

1 Com. / 0 Irr.
Glyceryl Stearate Emollient, Emulsifying
1 / 0 Not safe for Fungal Acne Icon
Not safe for Fungal AcneNot safe for Fungal Acne Icon

Glyceryl Stearate is a mix of glycerin and stearic acid.

1 Com. / 0 Irr.
Very Disliked Full details ->
Isononyl Isononanoate Emollient, Skin Conditioning

Isononyl Isononanoate is a synthetic skin-conditioner and texture enhancer. It is created from nonanoic acid, a fatty acid found in cocoa and lavender oil.

Behenyl Alcohol Emollient, Emulsion Stabilising
Fatty Alcohol Icon
Fatty AlcoholFatty Alcohol Icon

A type of fatty alcohol. Fatty Alcohols are most often used as an emollient or to thicken a product. They are usually derived from natural fats and oils and therefore do not have the same drying or irritating effect as traditional alcohols.

Disliked Full details ->
Dimethicone Emollient, Skin Conditioning, Skin Protecting
1 / 0 Silicon Icon
SiliconSilicon Icon

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.

1 Com. / 0 Irr.
Very Disliked Full details ->
Stearyl Alcohol Emollient, Emulsifying, Emulsion Stabilising
2 / 2 Fatty Alcohol Icon
Fatty AlcoholFatty Alcohol Icon

Stearyl Alcohol is a type of fatty alcohol from stearic acid. It is a white, waxy compound used to emulsify ingredients.

2 Com. / 2 Irr.
Very Disliked Full details ->
Sodium Hyaluronate Humectant, Skin Conditioning
0 / 0 Hyaluronic Acid Icon
Hyaluronic AcidHyaluronic Acid Icon

Sodium Hyaluronate is hyaluronic acid's salt form. It is commonly derived from the sodium salt of hyaluronic acid.

0 Com. / 0 Irr.
Hydrolyzed Collagen Emollient, Humectant, Skin Conditioning
Helps with Anti-Aging Icon
Helps with Anti-AgingHelps with Anti-Aging Icon

Hydrolyzed collagen has a misleading name because it is actually a mixture of various proteins/peptides. This ingredient has skin hydrating properties.

Hydrolyzed Elastin Emollient, Skin Conditioning

We don't have a description for Hydrolyzed Elastin.

Unknown Full details ->
Betaphycus Gelatinum Extract Bleaching

We don't have a description for Betaphycus Gelatinum Extract.

Unknown Full details ->
Crambe Abyssinica Seed Oil Skin Conditioning
Oil IconNot safe for Fungal Acne Icon
OilOil Icon Not safe for Fungal AcneNot safe for Fungal Acne Icon

Crambe Abyssinica Seed Oil is an oil and isn't fungal acne safe.

Stearyl Glycyrrhetinate Skin Conditioning, Soothing

We don't have a description for Stearyl Glycyrrhetinate.

Unknown Full details ->
Ascorbyl Tetraisopalmitate Antioxidant, Emollient, Skin Conditioning
Vitamin C IconAntioxidant IconHelps reduce Skin Redness IconGood for Skin Texture IconHelps with Anti-Aging IconGood for Dark Spots IconNot safe for Fungal Acne Icon
Vitamin CVitamin C Icon AntioxidantAntioxidant Icon 4 Benefits Not safe for Fungal AcneNot safe for Fungal Acne Icon

Ascorbyl Tetraisopalmitate is a version of ascorbic acid, or pure Vitamin C.

Phytosteryl Macadamiate Skin Conditioning
Not safe for Fungal Acne Icon
Not safe for Fungal AcneNot safe for Fungal Acne Icon

Phytosteryl Macadamiate comes from the fatty acids of Macadamia Seed Oil and an ester of phytosterol. Phytosterols are the plant-versions of cholesterol.

Tocopheryl Acetate Antioxidant, Skin Conditioning
0 / 0 Vitamin E IconAntioxidant IconHelps brighten skin Icon
Vitamin EVitamin E Icon AntioxidantAntioxidant Icon Helps brighten skinHelps brighten skin Icon

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.

0 Com. / 0 Irr.
Sodium Dilauramidoglutamide Lysine Humectant

We don't have a description for Sodium Dilauramidoglutamide Lysine.

Unknown Full details ->
Sodium Chondroitin Sulfate Skin Conditioning
Sulfate Icon
SulfateSulfate Icon

Sodium Chondroitin Sulfate is a type of sulfate.

Unknown Full details ->
Polyglyceryl-10 Eicosanedioate/Tetradecanedioate Skin Conditioning

We don't have a description for Polyglyceryl-10 Eicosanedioate/Tetradecanedioate.

Unknown Full details ->
Cellulose Gum Emulsion Stabilising, Masking
0 / 0

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.

0 Com. / 0 Irr.
Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer Emulsion Stabilising

This is a synthetic polymer. It helps improve the texture of products by adding thickness and gel-like feel.

Disliked Full details ->
Disodium Phosphate Buffering, Masking

We don't have a description for Disodium Phosphate.

Unknown Full details ->
Potassium Phosphate Buffering

Potassium Phosphate is the term for the salts of potassium and phosphate ions. Our bodies naturally create and use potassium phosphate.

Disodium EDTA

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

Disliked Full details ->
Ethylhexylglycerin Skin Conditioning

Ethylhexylglycerin (we can't pronounce this either) is commonly used as a preservative and skin softener. It is derived from glyceryl.

Sorbitan Isostearate Emulsifying
1-2 / 0 Not safe for Fungal Acne Icon
Not safe for Fungal AcneNot safe for Fungal Acne Icon

Sorbitan Isostearate is an emulsifer and cleaning agent. It is created from isostearic acid and sorbitol.

1-2 Com. / 0 Irr.
Very Disliked Full details ->
Polysorbate 60 Emulsifying
Not safe for Fungal Acne Icon
Not safe for Fungal AcneNot safe for Fungal Acne Icon

Polysorbate 60 is used to help stabilize products. It is a surfactant and emulsifier. These properties help keep ingredients together in a product. Surfactants help reduce surface tension between ingredients with different states, such as liquids and solids. Emulsifiers help prevent oils and waters from separating.

Very Disliked Full details ->
Butylene Glycol Humectant, Masking, Skin Conditioning
1 / 0

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

1 Com. / 0 Irr.
Tocopherol Antioxidant, Masking, Skin Conditioning
0-3 / 0-3 Vitamin E IconAntioxidant IconHelps hydrate Dry Skin IconHelps with Anti-Aging IconGood for Scar Healing IconHelps brighten skin IconMay cause irritation Icon
Vitamin EVitamin E Icon AntioxidantAntioxidant Icon 4 Benefits May cause irritationMay cause irritation Icon

Tocopherol (also known as Vitamin E) is a common antioxidant used to help protect the skin from free-radicals and strengthen the skin barrier. It's also fat soluble - this means our skin is great at absorbing it.

0-3 Com. / 0-3 Irr.
Alcohol Antimicrobial, Astringent, Masking
Alcohol IconCan worsen Dry Skin IconMay worsen Oily Skin IconMay cause irritation IconMay worsen Eczema IconMay worsen Rosacea Icon
AlcoholAlcohol Icon 5 Concerns

Alcohol comes in many different forms. Different types of alcohol will have different effects on skin. This ingredient is usually an astringent alcohol.

Very Disliked Full details ->
Parfum Masking, Perfuming
Fragrance IconMay worsen Eczema IconMay worsen Rosacea Icon
FragranceFragrance Icon 2 Concerns

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

Very Disliked Full details ->
Phenoxyethanol Preservative
Preservative Icon
PreservativePreservative Icon

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

Very Disliked Full details ->

Ingredients Explained

These ingredients are found in both products.

Ingredients higher up in an ingredient list are typically present in a larger amount.

Skin Conditioning, Solvent
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. If you see this, drink a glass of water. Stay hydrated!

Learn more about Water
Humectant, Skin Conditioning, Skin Protecting
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
Humectant, Masking, Skin Conditioning
Mixed

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

  • It is a solvent, meaning that it helps to dissolve other ingredients. This also enhances the absorption of the product into one's skin.
  • It is a humectant, which means that it helps attract moisture into the skin.
  • It helps improve product application.

Overall, Butylene Glycol is a safe and well-rounded ingredient. It is unlikely to irritate skin, and works well with pretty much all other ingredients.

Emollient, Skin Conditioning, Skin Protecting
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.

Emollient, Emulsifying
Very 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
Humectant, Skin Conditioning
Loved

Sodium Hyaluronate is hyaluronic acid's salt form. It is commonly derived from the sodium salt of hyaluronic acid.

Like hyaluronic acid, it is great at holding water and acts as a humectant. This makes it a great skin hydrating ingredient.

Sodium Hyaluronate is naturally occurring in our bodies and is mostly found in eye fluid and joints.

These are some other common types of Hyaluronic Acid:

Learn more about Sodium Hyaluronate
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
Antioxidant, Skin Conditioning
Liked

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.

Tocopheryl Acetate is commonly found in both skincare and dietary supplements.

Learn more about Tocopheryl Acetate
Preservative
Very Disliked

Phenoxyethanol is a preservative that has germicide, antimicrobial, and aromatic properties. Studies show that phenoxyethanol can prevent 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.

Masking, Perfuming
Very Disliked

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.

In the US, the alternative name for parfum is 'fragrance'.

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 by INCI standards.

One example is Calendula flower extract. Calendula is an essential oil that still imparts a scent or 'fragrance'.

Depending on the blend, the ingredients in the mixture can cause allergies and sensitivities on the skin. Some ingredients that are known EU allergens include linalool and citronellol.

Parfum can also be used to mask or cover an unpleasant scent.

The bottom line is: not all fragrances/parfum/ingredients are created equally. If you are worried about fragrances, we recommend taking a closer look at an ingredient. And of course, we always recommend speaking with a professional.

Learn more about Parfum

Ingredient Ratings

Here's what our community thinks of the ingredients in these two products.

Youth Code Dark Spot Corrector Serum
8
2
20
2
liked
mixed
disliked
not rated
The Dewy Serum Resurfacing and Plumping Treatment
13
4
11
7
liked
mixed
disliked
not rated

When to use

1 Routine
100% use in am
0% use in pm
100% use every day
33 Routines
64% use in am
36% use in pm
82% use every day
When to use See routines that use it ->