This document summarizes a presentation on choosing supplements wisely for horses. It discusses that while some supplements can be beneficial, many are not necessary for a horse on a balanced diet. Joint supplements have only been shown to help existing joint problems, not as preventatives. Herbal supplements are not well regulated and can have drug interactions. Electrolytes are only needed for horses exercising heavily due to sweat loss. A balanced diet is usually sufficient for normal horses, so supplements should be chosen carefully and as needed rather than as daily additions to feed. Buyers should read labels and understand what supplements contain before purchasing.