Equisetum arvense (Horsetail)
Common Name: Horsetail
Other Names: Marestail, Snake Grass, Puzzle Grass
Family: Equisetaceae
Botanical Description
Equisetum arvense is a perennial vascular botanical distinguished by hollow, jointed, and longitudinally ridged stems. Leaves are reduced and arranged in whorls fused into nodal sheaths. The stems are photosynthetic and may bear whorled branches emerging from nodes. The botanical is notable for its high silica content, which contributes to its rigid structure.
Parts Used in Formulation
• Stem Extract
• Leaf Extract
Phytochemical Profile
- Silica (silicon compounds)
- Flavonoids
- Saponins
- Phenolic acids
- Alkaloids
- Potassium salts
Functional Applications
Scalp
Silica contributes to structural support in keratin-producing tissues.
May assist in reinforcing follicular resilience through mineral support.
Antioxidant constituents help reduce oxidative stress at the scalp surface.
Claims of direct “hair growth stimulation” via topical circulation enhancement are not strongly supported by clinical evidence; benefits are primarily structural and protective.
Hair Fiber
Silicon compounds are associated with improved tensile strength and reduced brittleness.
Supports strand reinforcement and resilience when incorporated into conditioning systems.
May enhance perceived sheen through cuticle smoothing effects.
Skin
Silica is linked to connective tissue support and collagen maintenance.
May contribute to improved firmness through structural reinforcement mechanisms.
Exhibits mild astringent and antioxidant properties.
Topical application does not regenerate collagen de novo but may support preservation of existing collagen through antioxidant pathways.
Oral Care (Traditional Use)
Historically incorporated into herbal dentifrices due to mineral content.
Provides mild abrasive properties and mineral support.
There is no validated evidence that horsetail stimulates new enamel formation; enamel regeneration in humans is biologically limited.
Nails
Silica contributes to keratin reinforcement.
Associated with improved resilience in brittle nail structures.
Supports reduction in splitting through structural mineral contribution.
Traditional Lineage
Used in European herbal traditions for connective tissue and mineral support. Historically included in strengthening tonics and mineral infusions.
Sensory Profile
Green, mineral-forward aroma
Lightweight extract
Non-oily
Slightly astringent character
Stability & Compatibility
Stable in extract form
Performs synergistically with antioxidant-rich botanicals
Complements mucilage-based conditioning extracts and lipid carriers