Question 1

What does Psidium Guajava Leaf Extract do in a cosmetic formula?

Accepted Answer

This ingredient is used as a botanical skin-conditioning extract with antioxidant and astringent properties. It is most often included to support calm-looking skin, refine feel, and add polyphenol-based protection to the formula.

Question 2

Is Psidium Guajava Leaf Extract clean?

Accepted Answer

From a clean-beauty perspective, it is generally low concern and not a common restricted-list ingredient. The main quality questions are extract standardization, solvent choice, pesticide residues, heavy metals, and microbial control.

Question 3

Is Psidium Guajava Leaf Extract sustainable?

Accepted Answer

This material is plant-derived and commonly made from leaves, a renewable part of the crop that can be collected without using the fruit itself. It is expected to be readily biodegradable, with sustainability depending mainly on farming practices, drying, and extraction solvent management.

Question 4

Is Psidium Guajava Leaf Extract COSMOS-approved?

Accepted Answer

It is generally compatible with COSMOS-natural and COSMOS-organic when the plant source, processing aids, and extraction solvents meet the standard. It fits Green Chemistry best when produced with water, ethanol, glycerin, or other approved lower-impact solvents and minimal processing.

Question 5

How does Psidium Guajava Leaf Extract work chemically?

Accepted Answer

This is a complex botanical extract rich in tannins, flavonoids, phenolic acids, and triterpenoid constituents rather than a single defined molecule. Typical use levels are often around 0.1% to 5% depending on extract strength, and polyphenol-rich extracts can darken or lose activity over time in high-pH, metal-rich, or high-oxygen systems.