Horsetail

Horsetail (Equisetum arvense) contains one of the highest concentrations of naturally occurring silica (silicon dioxide) in the plant kingdom, often making up about 25% of its dry weight.

And because it is naturally rich in silica, horsetail extract is often included in skincare designed to support firmer-looking skin. This mineral plays a role in collagen production and tissue repair, helping the skin maintain its structure and elasticity over time.

Meanwhile, naturally occurring tannins and saponins provide a gentle astringent effect. They can help reduce excess oil and refine the appearance of enlarged pores, leaving the complexion more balanced. This can be explained as astringent ingredients are added to skincare to temporarily contract skin tissues, shrink the appearance of enlarged pores, and remove excess sebum.

Alongside these benefits, horsetail has a long history of use as a soothing botanical because of its anti-inflammatory compounds that help comfort irritated skin and support barrier recovery.

From anti-ageing serums to firming eye creams, horsetail extract is often included in formulations designed to support skin elasticity and address the appearance of fine lines. 

It's also found in mattifying toners and cleansers, helping to promote a smoother-looking complexion. Creams targeted towards stretch marks may use horsetail in the formulation to support skin resilience, while balms and other products use it to comfort irritated or dehydrated skin.