Best Horse Weight Building Supplements (2026 Guide)
We ranked supplements by aggregated user rating and review volume, then assessed ingredient transparency, formulation type, and reported benefits for weight, muscle, or hoof condition
This guide covers top-rated equine supplements designed to help horses gain healthy weight and support muscle and hoof condition, with picks drawn from user ratings and review volume across leading equine supplement lines. Selections were evaluated for ingredient profiles, form factors (crumble, liquid, powder), and consistency of customer feedback to surface broadly recommended options
Top Picks
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1
Formula 707 Weight Gain Crumble for Equines
Palatable, calorie-rich supplement to support weight and energy in hard-to-keep and senior horses. Customers note effective weight maintenance and palatability, with praise for quality
- calorie-rich formula
- palatable crumble
- supports weight and energy
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2
Formula 707 MuscleMx Equine Supplement – Conditioning & Muscle Builder
Equine supplement that supports conditioning and muscle mass with amino acids and energy aids. Key benefit: supports muscle-building metabolism. Customer insight notes mixed/none previously observed
- lysine for muscle proteins
- gamma oryzanol for weight gain
- okg for metabolic support
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3
Body Builder 4000 Horse Weight Gain Supplement
High fat and energy horse weight builder with body conditioning vitamins. promotes weight gain and muscle recovery with improved hoof quality; suitable for lactating mares to maintain body weight. Noted for shiny coat and growth support
- 40% fat content
- 26% protein content
- designed for weight gain and muscle building
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4
UltraCruz Equine Weight Gain 1 Gallon
Equine weight gain supplement in a 1 gallon container. Helps support weight gain in horses. Customer note mentions its use for weight management
- weight gain support
- 1 gallon container
- horse-specific supplement
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5
Formula 707 MuscleMx Equine Supplement – 10 lb
Eq muscle-building supplement for conditioning and definition in horses. Supports metabolism and muscle-building with lysine, gamma oryzanol, creatine, and OKG. Customer insight notes mixed signals on satisfaction
- multi-ingredient muscle support
- lysine for protein synthesis
- gamma oryzanol for weight and muscle formation