100% Pure Green Tea EGCG Concentrate Serum

This honeysuckle is native to East Asia and used in traditional Chinese medicine to treat fever and inflammation.

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.

The only catch is that HA isn't a single thing; it actually comes in a wide range of molecular weights (~50 - 2,000+ kDA) and size matters.

Some clinical evidence links low molecular weight versions to improved wrinkle depth, elasticity, anti-inflammatory effects, and barrier repair.

This is why the best HA serums blend the two sizes together so you get the best of both worlds.

The majority of cosmetic HA is produced by bacterial fermentation, typically using Streptococcus or Bacillus strains. Typical use levels in skincare sit around 0.1-2%.

A clinical study using a 0.2% low-molecular weight HA gel showed improvement in facial seborrheic dermatitis with excellent tolerance.

These are some other common types of Hyaluronic Acid:

Another interesting compound that makes it stand out from other oils is the trace amount of all-trans retinoic acid (the same molecule as prescription tretinoin), along with some carotenoids and tocopherols.

The linoleic acid is a precursor to ceramide 1, one of the essential lipids in the stratum corneum. Topical linoleic acid application has been shown to improve barrier function and reduce comedone size in clinical studies.

One study found that linoleic acid and alpha-linoleic acid lighten UV-induced hyperpigmentation. A 2015 study found that participants who used rosehip twice daily for eight weeks saw improvements in crow's feet, skin moisture, and skin elasticity compared to the placebo.

If you're hoping to get tretinoin benefits from this ingredient, it's worth noting the trans-retinoid acid is trace-level and minimal compared to the amount of retinol or tretinoin found in formulas.

A 2024 review highlighted the fatty acid composition in rosehip-based dermatological products for:

Typical usage rates range from 1-100% with 5-10% being the most common in moisturizers.

Since the oil is high in polyunsaturated fatty acids, it's prone to oxidation. Look for formulations stabilized with ingredients like vitamin E and be sure to store away from light/heat.

Fungal acne: This oil is not considered fungal acne safe because dominant fatty acids fall into the C11-24 range that Malassezia can metabolize.

Preclinical research has found that topical avocado oil increased collagen synthesis and reduced inflammation during wound healing, giving it some skin-repairing credibility.

The unsaponifiable fraction of the oil is also interesting: studies on avocado unsaponifiables showed that it helped skin produce more collagen and other structural compounds that support healing.

The CIR Expert Panel has found this ingredient to be non-irritating in formulations.

It's a great ingredient for dry or compromised skin. Just know it may not be fungal acne safe. This is because the oleic acid content falls within the range that Malassezia can use as a food source.

This is due to how structurally similar it is to what your skin already produces.

Though it is mostly an emollient that helps soften and hydrate skin, it also has some humectant and occlusive action. Humectants help the skin retain moisture while occlusives seal it in, making squalane a triple-threat moisturizer.

Research shows it has antioxidant capabilities that help protect against stressors like UV exposure, specifically UVA induced oxidative stress. This study also found that it supports collagen biosynthesis in human dermal fibroblasts.

No clinical study has reported significant adverse effects and irritation reactions are very rare from this ingredient (even at 100% concentration).

Overall, it's a fantastic ingredient for hydration and is suitable for all skin types.

This depends on the source. Squalane can be derived from both plants and animals. Most squalane used in skincare comes from plants.

Please note: the source of squalane is only known if disclosed by the brand. We recommend reaching out to the brand if you have any questions about their squalane.

Read more about squalene with an "e".

Though squalane is often called an oil, it’s technically not one. It is a hydrocarbon, meaning it is only made of carbon and hydrogen. True oils are triglycerides and made of fatty acids and glycerol.

The term “oil-free” isn’t regulated so companies can define it however they want. Some exclude all oils, while others just avoid mineral oil or comedogenic oils.

Squalane has a comedogenic rating of 1 from the original 1972 study that tested raw ingredients under occlusion on rabbit ears. This system is not standardized or peer-reviewed, and using the raw ingredients is very different from how diluted cosmetic formulations are used on human skin.

A comedogenic rating of 1 means it is "unlikely to clog pores" according to the original rating system.

The overall formula of a product matters more than the individual ingredients on whether or not it will cause clogged pores.

UV-exposed skin cells treated with EGCG showed less of the enzyme that chews up collagen, lower inflammatory signaling, and better preserved barrier function.

EGCG nudges skin cells to make more of your skin's built in moisturizing molecules, filaggrin and hyaluronic acid, for better skin hydration.

Because it inhibits melanogenesis, it also provides a mild brightening effect.

Clinically, topical EGCG has helped calm radiation-related skin irritation and scalp seborrheic dermatitis with no major side effects.

In an 8-week split-face study, topical EGCG at 1% and 5% significantly reduced inflammatory and non-inflammatory acne.

A study from 2023 on patients with Seborrhea (a chronic skin condition caused by overactive sebaceous glands) found that using a 5% EGCG cream (alone and combined with 2% L-carnitine) and found meaningful sebum reduction plus better hydration.

Just one caveat here: Most clinical trials used 1-5% concentrations and most cosmetics contain only 0.1-1%.

The only headache related to this ingredient is stability. EGCG degrades quickly with heat, light, oxygen, and higher pH.

That's why you'll usually see it in low-pH formulas (4.5-6.5) or paired with vitamin C + vitamin E to slow its degradation. Hyaluronic acid also stabilizes it and boosts its antioxidant activity.

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.

When used topically, Citrus Aurantium Bergamia Fruit Oil is a photosensitizer due to the furanocoumarin content. Furanocoumarins absorb UV-A and cause phytophotodermatitis; this can look like redness, blistering, and lasting brown pigmentation on sun-exposed skin.

Due to this, this ingredient is capped at 0.4% in leave-on products applied to sun exposed skin.

Many modern formulas used a "furanocoumarin-free" version that sidesteps the phototoxicity issue, but still contains the fragrance allergens.

In 2023, it was listed as an EU known-allergen.

At higher concentrations, that reaction can lead to sun sensitivity, irritation, or dermatitis (red, inflamed skin). If your skin is sensitive, it's worth being a little cautious with fragrant citrus oils like this one.

When exposed to air, these two compounds become strong allergens. This ingredient exhibits cytotoxicity at low concentrations; amounts of 0.25% have been shown to damage skin cells.

A study from Japan found this ingredient caused lavender sensitivity after widespread exposure.

Lavender essential oil has some antimicrobial, antibacterial, and anti-inflammatory properties. However, the cons of this ingredient may outweight the pros.

More research is needed to confirm lavender essential oil's effects when used in aromatherapy.

Lavandula Angustifolia is known as the English Lavender and famous for creating purple fields in Provence, France.