Then I Met You The Giving Essence Versus Then I Met You Essence Light Sunscreen SPF 50

GFF works by stimulating filaggrin production in the skin. Filaggrin is a protein that binds structural proteins in the outer skin layer together to form a tight barrier that shields against allergens, bacteria, and moisture loss.

It's also a key building block of our natural moisturizing factors (NMF), or the network of compounds that keep skin plump and hydrated.

By boosting filaggrin, GFF helps strengthen both our barrier and our skin's ability to retain moisture.

Beyond hydration, GFF has notable antioxidant properties that help protect against oxidative stress and UV-induced inflammation.

Research also suggests it may help regulate sebum and keratin production. This could be an interesting option for those concerned about oiliness or skin texture.

Fungal acne:
This ingredient doesn't contain fatty acids or oils that could feed Malassezia, and the yeast used to make it (Galactomyces) is a different genera of fungi from Malassezia. The presence of one doesn't stimulate the other.

However, there is a concern raised by some communities that this ingredient could trigger a reaction in people who are broadly sensitive to yeast/fungal-derived ingredients.

Your skin makes glycerin on its own (mostly from sebaceous oil breakdown) and shuttles it to your outermost layer of skin, or your epidermis, via aquaporin-3.

Aquaporin-3 is a transporter that is essential for normal skin hydration, elasticity, and repair. Interestingly, mice lacking in AQP3 have dry and less elastic skin that can be fully corrected with glycerin.

This ingredient is non-irritating, plays well with almost every ingredient, and works across all skin types. Typical use is anywhere between 3-10% but can go up to 79% in some leave-on products.

Just know very high concentrations (>40%) can feel tacky in low humidity.

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

Evidence-wise, its relatives (like Galactomyces) are the ones with the most published lab work. Keratinocyte studies show these ferments can boost barrier-related markers. This ingredient is generally assumed to behave similarly thanks to its overlapping composition.

This ingredient may not be fungal acne safe because its a fermentation filtrate. The exact composition is batch-variable and can include fatty acids and lipids byproducts.

Interestingly, the size of the molecule affects its behavior:

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

Many serums use a blend of both weights so you can get surface hydration plus longer-lasting and deeper effects.

You'll typically see concentrations between 0.1-2% for this ingredient.

You'll also recognize water as that liquid we all need to stay alive. If you see this, drink a glass of water. Remember to stay hydrated!

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.