Common name: Horsetail
Latin name: Equisetum arvense
Parts commonly used: aerial parts
About Horsetail
Horsetail is one of the herbs Herbalist Kareem works with in the 4 Cycles of Life collection. Below you will find a short, plain-language overview of how this herb has traditionally been used, how people commonly enjoy it, and the safety points everyone should know before adding it to a daily routine.
Traditional uses
Horsetail is an ancient plant naturally rich in silica. It is traditionally used to support healthy hair, skin, and nails, and normal fluid balance.*
Traditional use describes how people and cultures have worked with a plant over many generations. It is a valuable part of herbal knowledge, but it is not the same as medical proof, and every body responds differently.
How it is commonly enjoyed
Enjoyed as a tea or in hair and nail blends. Start with small amounts, follow the directions on the product label, and pay attention to how your body responds. Herbs work best as part of a balanced lifestyle that includes whole foods, water, movement, and rest.
Safety notes
Important caution: This is an herb that calls for extra care. Please read the safety notes below carefully and speak with a qualified healthcare provider before use.
Horsetail may lower vitamin B1 (thiamine) and potassium over time; use for short periods. Not for pregnancy, breastfeeding, or children. Ask your doctor if you take diuretics or lithium.
As with any herb: avoid it if you have a known allergy to the plant or its plant family, ask your doctor or pharmacist before use if you take prescription medications, and talk with your provider before use if you are pregnant, breastfeeding, or giving herbs to a child. Stop use and seek medical care if you notice any unusual reaction.
What researchers are studying
Scientists continue to study Horsetail. One example from the published literature is a scientific review:
Johnson W, Bergfeld WF, Belsito DV, et al. (2026). Safety Assessment of Equisetum arvense-Derived Ingredients as Used in Cosmetics. International journal of toxicology.
Research like this is often early, small, or done in the lab, and it does not prove that Horsetail treats or prevents any condition. We share it so you can see that this herb is a subject of ongoing scientific interest.
Found in our products
*These statements have not been evaluated by the Food and Drug Administration. This information is for educational purposes only and is not intended to diagnose, treat, cure, or prevent any disease. Always talk with a qualified healthcare provider before using herbs, especially if you are pregnant, breastfeeding, taking medications, or managing a health condition.