Horsetail Extract: A natural skincare ingredient from a prehistoric "living fossil"

Hearing the name "Equisetum Arvense," does it evoke a sense of ancient charm? This prehistoric, ancient plant is actually an often-underestimated natural treasure in the modern skincare circle.

Today, let's unveil its mystery, from its long history to its scientifically proven efficacy, and discuss the ancient wisdom and skincare potential behind this "living fossil."

01 Historical Origins: A "Living Fossil" Through Time

Equisetum Arvense, also known as horsetail, has many aliases. You might have heard one of them, including Scouring Rush, Pine Weed, and Jointed Grass, among others. Just by hearing the names, you can guess its high recognition in folk medicine. Its native habitat spans the Northern Hemisphere, found in Europe, North America, and Asia, demonstrating exceptional vitality.

The appearance of this plant is also quite unique. It lacks the broad leaves and petals of ordinary flowers and grasses, relying entirely on its green, hollow, and branched vegetative stems for support. When growing in patches, it resembles a miniature prehistoric forest, exuding a sense of time travel.

In fact, traditional medicine around the world has long recognized the value of horsetail, with a wide range of applications. For example, its astringency is used to stop bleeding and promote wound healing. In Europe and Serbia, it's used as a diuretic and to address kidney and urinary system issues. It can also be useful for inflammatory conditions like rheumatism and gout. Most notably, its high concentration of silica can strengthen bones, nails, and hair health, and protect connective tissues. These uses, passed down for hundreds of years, have also provided valuable clues for modern scientific research into its biological activity.

02 Ingredients and Efficacy Under Scientific Evidence

The intervention of modern science has not only validated the traditional efficacy of horsetail but also revealed the material basis and scientific mechanisms behind its actions.

• Silica, the most iconic component of horsetail extract, can reach 7% in standardized extracts and is key to maintaining stable skin structure.

• Phenolic Compounds, mainly divided into two categories: one is phenolic acids such as caffeic acid, vanillic acid, and ferulic acid, which have strong antioxidant capabilities; the other is flavonoids, such as kaempferol, quercetin, and luteolin, which are both potent antioxidants and anti-inflammatory agents.

In addition, horsetail also contains terpenoids, which have anti-inflammatory effects; saponins and tannins are closely related to its antibacterial and anti-inflammatory properties.

Table 1 Key skincare benefits of horsetail extract: antioxidant, anti-inflammatory, and auxiliary repair

Core efficacy	Key Active Ingredients	Scientific Mechanism of Action
Antioxidant	Kaempferol, caffeic acid, resveratrol, phlorizin, quercetin, etc.	Neutralizes reactive oxygen species (ROS) by donating hydrogen atoms or electrons, effectively scavenging DPPH and ABTS free radicals, and possesses strong metal reducing capacity.
Anti-inflammatory and Soothing	Kaempferol, caffeic acid, etc.	Regulates the function of inflammatory immune cells, inhibits the inflammatory process, and can improve skin redness and discomfort caused by sensitivity or external stimuli.
Assists in repair	High silica content, etc.	Silica is an important element for maintaining bone and connective tissue health, and provides support for skin structure. High silica content can stimulate collagen production, thereby improving skin elasticity and firmness.
Antibacterial potential	Saponins, tannins, and various phenolic compounds	Scientific research confirms its inhibitory effect on specific bacteria such as Staphylococcus aureus, which helps maintain the skin's microecological balance and prevent skin problems caused by the overgrowth of harmful bacteria.

03 What do these effects mean in acne prevention and treatment?

Horsetail (Equisetum arvense) extract is a multifunctional natural ingredient with great potential in the prevention and treatment of acne, thanks to its rich chemical composition, such as high silica content, flavonoids, and phenolic acids.

Anti-inflammatory (Anti-inflammatory): The most visible symptom of acne is redness and inflammation. The flavonoids and phenolic acid components in horsetail can effectively reduce skin irritation and redness, exerting anti-inflammatory effects by intervening in the function of immune cells, thereby alleviating the discomfort of inflammatory acne.

Antibacterial and biofilm inhibition (Antibacterial): Bacterial proliferation is an important cause of acne exacerbation, such as Staphylococcus aureus. Studies have found that the ethanol extract of horsetail can destroy bacterial cell walls and cytoplasmic membranes, inhibit various pathogenic bacteria, and reduce bacterial biofilm formation, thereby reducing the risk of infection and preventing acne from worsening.

Antioxidant and oil balance (Antioxidant): Horsetail extract has a strong free radical scavenging ability. It can neutralize reactive oxygen species (ROS) and prevent skin damage from oxidative stress.

Promotes wound healing and repair (Wound Healing & Repair): After acne subsides, horsetail can also help repair. Silica stimulates collagen production, accelerates the healing of acne pits and wounds, and prevents acne marks from scarring. Moreover, its moisturizing and soothing effects also provide protection for dry and sensitive skin.

Conclusion: Embrace a new skincare force from ancient times

Next time you see horsetail (Equisetum Arvense) on a skincare ingredient list, don't dismiss it as just another plant. It carries the resilience of ancient life, inherits the wisdom of traditional medicine, and possesses scientifically verified antioxidant, soothing, and repairing capabilities. Such a natural ingredient deserves our extra attention and trust.

References

1. J. Oleo Sci. 74, (12) 1117-1128 (2025)

2. Phytomedicine Plus 3 (2023) 100444

3. March 2017 IOSR Journal of Pharmacy (IOSRPHR) 7(2):31-42