How does cornflower hydrosol act on puffiness and dark circles?

The cornflower (Centaurea cyanus) is a plant in the Asteraceae family, native to Europe, and recognizable by its intensely blue flowers. Once very common in grain fields, it has gradually become rarer with the use of herbicides. Today, the flowers used in cosmetics come mainly from controlled cultivation, often organic farming, in order to preserve their quality.

The cornflower hydrosol, or cornflower floral water, is obtained by steam distillation of the flowers. Unlike other aromatic plants, this process does not make it possible to isolate a usable essential oil, but only an aqueous phase, slightly enriched with water-soluble compounds. It contains, in particular, traces of aromatic molecules such as linalool or alpha-terpineol, as well as phenolic compounds, including anthocyanins. These substances give cornflower hydrosol its soothing and antioxidant properties, even though their low concentration in the hydrosol calls for caution regarding the magnitude of their effects.

Cornflower hydrosol is traditionally used to soothe tired eyes and reduce visible signs around the eye contour, such as puffiness and dark circles. This use is based in part on its cooling effect and on the presence of compounds with soothing properties, which may help limit sensations of discomfort in this particularly thin and well‑vascularized area. The local application of a cool liquid can also promote slight vasoconstriction, helping to temporarily reduce the swollen appearance of puffiness.

Regarding dark circles, the mechanisms involved are more complex and depend on their origin, whether vascular, pigmented, or structural. Certain compounds found in cornflower, particularly polyphenols such as anthocyanins, are known for their antioxidant properties and could help limit some of the processes involved in the appearance of pigmented dark circles. However, to date, scientific data remain limited and do not allow us to assert a marked or systematic effect of cornflower hydrosol on this issue.

Some experimental studies nevertheless provide interesting insights. Research carried out by the Research and Innovation Department of the L’Oréal group, reported in particular by Michel Faucon in his work Scientific and Medical Aromatherapy Treatise – Hydrosols, has evaluated the effects of a cornflower aqueous extract on pigmentation. In vitro, on human cell cultures, daily application for 10 days at high concentrations (50% and 100%) showed a reduction in the amount of melanin produced by melanocytes, suggesting a potential effect on the intensity of brown dark circles. These results were then investigated in a clinical study conducted in 41 women aged 35 to 59 years.

Twice-daily application of compresses soaked in 50% cornflower water, for 5 to 10 minutes over the course of one month, was associated with a visible reduction in dark circles and a decrease in under-eye puffiness.

However, several limitations must be emphasized: relatively small sample size, lack of comparison with a placebo, and specific conditions of use (extended application time that is difficult to translate to typical everyday use). These results therefore suggest potential interest, but should be interpreted with caution.

• NGENOT L. & al. Anti-inflammatory and immunological effects of Centaurea cyanus flower-heads. Journal of Ethnopharmacology (1999).

• HU S. & al. Clinical analysis and classification of dark eye circle. International Journal of Dermatology (2013).

• FAUCON M. Traité d'aromathérapie scientifique et médicale - Les hydrolats. Sang de la Terre (2018).