Supplement stack checker

Add what you're feeding. See what's stacking.

Enter your horse's body weight and management goal, then add each supplement and ration balancer you feed. The tool sums daily totals for the nutrients that matter (vitamin E, selenium, copper, zinc, iron, magnesium, omega-3, lysine), checks them against requirements and safety thresholds, and flags duplicates, overdoses, and Cu:Zn imbalance.

1Horse profile

Targets and safety thresholds scale to body weight. PSSM mode raises vitamin E, selenium, magnesium, and copper-zinc targets. EPM acute mode raises vitamin E and antioxidants; rehab mode raises lysine.

2Add a supplement

Current stack

  • Nothing added yet. Pick a supplement above to begin.

3Daily totals and status

Each row shows the daily total of one nutrient against the recommended range and the upper safe limit for your horse's body weight and goal. Bars: green = optimal, gold = below target, red = above safe limit.

i Add at least one supplement to see status checks. The tool will flag vitamin E duplication, selenium overdose, Cu:Zn imbalance, iron stacking, and other common errors.
Reference, not veterinary advice. Manufacturer label values are approximate and reformulations occur; verify against the current label. Do not change supplementation on a horse with a confirmed metabolic or neurologic diagnosis without your veterinarian.