Horsetail
Equisetum arvense
Horsetail is a silica-rich plant traditionally used for connective tissue, urinary support, and mineral-focused wellness formulas.
Primary Use
Supports connective tissue health
Common Forms
Capsule, Tea
Typical Dose
300-600 mg extract
Time to Effect
2-4 weeks
Overview
Horsetail is one of the oldest plant lineages on earth and has been used traditionally in Europe and elsewhere for urinary support, wound care, and tissue repair. Its high silica content is the main reason it appears in formulas for hair, skin, nails, and connective tissue.
Modern use tends to focus on bone and tissue support, though human evidence is limited. It is also used in mild diuretic formulas. Because quality and species identification matter, properly sourced products are important.
How It Works
Horsetail is rich in silica and also contains flavonoids and trace minerals. Silica contributes to connective tissue structure and is one reason the herb is associated with hair, nails, and bone support.
It may also have mild diuretic activity, which can increase urine output. Some raw forms contain thiaminase, so well-processed extracts and sensible dosing are preferred for repeated use.
What It's Used For
Supports connective tissue health
Its silica content is the main reason horsetail is used for structural tissues. Evidence is more traditional and mechanistic than strongly clinical.
May support hair and nail strength
Many people use horsetail in beauty formulas for brittle nails and weak hair. Some benefit is plausible, though human studies are limited.
May support bone wellness
Silica may contribute to bone matrix support, which explains its inclusion in bone-focused supplements. Strong clinical evidence remains limited.
Provides mild urinary support
Traditional use includes mild fluid balance support through gentle diuretic action. It is not a substitute for treatment of urinary infections.
Dots indicate strength of research evidence (5 = strongest)
Disclaimer: This information is for educational purposes only and is not intended as medical advice. Always consult with a qualified healthcare provider before starting any new supplement, especially if you have a medical condition or take medications.
Last updated: March 2026