The Effects of Chaste Berry on the Equine Metabolic System

TriSana Nutrition
Apr 23, 2024
2 min read

Updated: Jul 15, 2025

At Trisana Nutrition, we focus on science-backed, filler-free supplements that support your animal’s health from the inside out. One of our most trusted tools for equine hormone health and metabolic support is Chaste Berry, a powerful plant with centuries of medicinal use and modern science to back it up.

What is Chaste Berry?

Also known as Vitex agnus-castus, Chaste Berry is a small fruit used traditionally to help regulate hormone cycles and support endocrine health. In horses, it’s commonly used to support those dealing with insulin resistance, equine metabolic syndrome (EMS), and Cushing’s disease.

Why Hormone and Metabolic Support Matters

For horses with EMS or PPID (pituitary pars intermedia dysfunction), maintaining hormonal balance and regulating insulin levels is critical. When the endocrine system is out of balance, horses are at risk for a range of health problems, from laminitis to weight gain, lethargy, poor coat condition, and even fertility challenges.

That’s where Chaste Berry comes in.

Key Benefits of Chaste Berry for Horses

✔️ Supports Thyroid Function: Chaste Berry can gently help regulate the pituitary and thyroid glands, making it ideal for horses struggling with Cushing’s or hormone-related imbalances.

✔️ Balances Hormones Naturally: It encourages proper hormone production and regulation, helping to stabilize mare cycles, stallion behaviour, and overall hormonal balance in both sexes.

✔️ Helps Manage Insulin Resistance & EMS: Chaste Berry has been shown to lower serum glucose levels and support insulin sensitivity, making it a smart choice for horses at risk of equine metabolic syndrome or with sugar sensitivity.

✔️ Supports Calm Behaviour: Hormonal imbalances can lead to mood swings or heightened reactivity. Chaste Berry can have a mild calming effect by bringing hormones into better alignment.

When to Consider Chaste Berry

Horses with Equine Metabolic Syndrome (EMS)
Horses with early-stage Cushing’s (PPID)
Mares with cycle-related behaviour or performance issues
Geldings and stallions with hormonal aggression
Horses prone to insulin spikes, laminitis, or sugar sensitivities

Trisana’s Approach: Pure, Potent, and Proven

At Trisana Nutrition, we use 100% pure, single-ingredient Chaste Berry, free from fillers, dyes, or artificial preservatives. We’ve formulated our herbs to be easy to mix, potent in action, and tailored to your horse’s exact needs — whether they’re a performance athlete or a senior pasture mate.

💬 Not sure if your horse needs Chaste Berry? Book your FREE nutritional consult and we’ll help build a personalized supplement plan based on your horse’s age, workload, diet, and health concerns.