Question 1

What does St. John's Wort do in a cosmetic formula?

Accepted Answer

This ingredient is used mainly as a botanical skin-conditioning and soothing extract in oils, balms, creams, and after-sun style formulas. It can also contribute antioxidant activity and a characteristic warm tint depending on the extraction method.

Question 2

Is St. John's Wort clean?

Accepted Answer

From a clean-beauty perspective, it is generally accepted when made with approved solvents and preserved appropriately, but it has more caveats than a bland carrier oil. Naturally occurring photoreactive compounds and botanical allergen variability make dosage, sourcing, and label context important.

Question 3

Is St. John's Wort sustainable?

Accepted Answer

This material is plant-derived and renewable, and its organic components are expected to biodegrade readily. Sustainability depends on responsible cultivation or wild-harvesting, extraction solvent choice, and whether the carrier oil used for macerates has a traceable supply chain.

Question 4

Is St. John's Wort COSMOS-approved?

Accepted Answer

It can be permitted under COSMOS-natural and COSMOS-organic when produced with approved extraction, carrier, and preservation methods, with organic status depending on certified agricultural inputs. Its renewable origin and biodegradability align well with Green Chemistry, while solvent selection and light-sensitive constituents are the main formulation considerations.

Question 5

How does St. John's Wort work chemically?

Accepted Answer

This material is a complex botanical mixture containing flavonoids, phenolic acids, phloroglucinols, tannins, and red naphthodianthrone pigments, with composition varying by plant part, harvest, and extraction medium. Typical cosmetic use is often around 0.1% to 5% for extracts and higher for oil macerates, and formulas should account for light and oxygen sensitivity, possible color shift, and photoreactive constituents.