Equine Mineral Data Report
Equine Mineral Data Report
We Analyzed 143 Horses. Here's What Their Hair Revealed.
Most conversations about horse minerals run on anecdote and marketing. We had data, so we looked. Across 143 hair analyses we measured 23 elements per horse against established laboratory reference ranges. The patterns were consistent, occasionally surprising, and rarely the ones owners expect.
The finding that surprised us: it isn't the heavy metals you'd expect
When owners worry about toxins, they picture lead and mercury. Our data is reassuring on that front. Across the cohort, lead, mercury, arsenic, and cadmium sat within the laboratory's normal range in essentially every horse. Trace amounts show up almost universally, which is expected for any animal living in a real environment, but the levels were low and unremarkable.
One element broke the pattern hard. Aluminum landed above the reference ceiling in 92% of horses, and above the upper limit in roughly one in seven. Aluminum is everywhere in the equine world, in soil, water, and some clays and feed additives, so this reads as an environmental exposure signal rather than acute poisoning. But the consistency is striking and worth understanding.
Share of horses above the lab reference range, by toxic element (n = 143). Aluminum is the clear outlier; the rest stay in normal territory.
Distribution of aluminum readings (mg%), by count of horses. The reference ceiling sits at 1.5 and the upper limit at 16.8; most horses fall well past the ceiling, with a long tail of higher-exposure cases.
The most common shortfalls aren't copper
Ask around and you'll hear that horses are universally copper deficient. Our numbers don't support that as a blanket claim. Copper read within range for 95% of horses. The real shortfalls sit elsewhere, and the single most common one is the cheapest to fix: sodium, low in 38% of horses. Plain salt is one of the most under-supplied nutrients in the average feed program.
Percentage of horses below the optimal range, by mineral (n = 143). Sodium, cobalt, calcium, and phosphorus lead; copper sits near the bottom.
Deficiency is only half the story
Looking only at what's low misses the picture. Several minerals skewed the other way. Iron came in above optimal in 29% of horses while only 9% ran low, a meaningful finding given the ongoing discussion around iron overload and metabolic health. Manganese and potassium showed elevated readings in a sizable minority too. Balance, not just sufficiency, is the goal.
Full distribution for selected minerals: share below, within, and above the optimal range. Note how iron inverts the usual deficiency pattern.
Why ratios matter more than any single number
This is where hair analysis earns its keep. A mineral can read "normal" on its own and still be functionally off because of how it relates to its partners. Copper is the clearest example. Even with copper levels mostly in range, the median zinc-to-copper ratio came in at 21.7, and about one in six horses exceeded 25. Zinc and copper compete for absorption, so a high ratio can blunt copper's effect even when the raw number looks fine.
Zinc-to-copper ratio across the cohort, by count of horses. Most cluster in the 20-to-30 band, higher than many feeding programs assume.
The same logic applies across the panel. Here are the cohort medians for the relationships we watch most closely:
What this means for horse owners
This is descriptive data, not a diagnosis, and it is not a substitute for your veterinarian. But a few practical patterns hold up well:
- Test before you supplement. The most common deficiencies here were not the ones the market sells hardest against. Guessing tends to over-correct one mineral while ignoring the one that actually matters.
- Salt is the easy win. Sodium was the single most common shortfall. Free-choice loose salt is cheap, safe, and addresses it directly.
- Balance, don't just fill. Iron ran high more often than low, and zinc-to-copper ratios skewed elevated. Adding more of a "deficient" mineral without checking its partners can make an imbalance worse.
- Know your environmental inputs. Near-universal aluminum points to water, soil, and certain additives. Worth reviewing your water source and label ingredients rather than assuming the feed bag is the whole story.
About this data
This report summarizes 143 equine hair-mineral analyses processed by Mane Metrics between mid-2025 and mid-2026, representing 39 horse owners. Samples were analyzed by our partner laboratory for 15 nutritional elements and 8 toxic elements, scored against the laboratory's established equine reference ranges. "Below" and "above optimal" refer to readings outside that reference band.
A few honest limits. This is a self-selected group: these are owners who chose to test, often because they already suspected an issue, and a portion come from the same barns, so it is not a random sample of the horse population. Hair analysis reflects longer-term mineral accumulation and is interpreted against tissue-specific reference ranges; it is not interchangeable with blood work or forage analysis, and it complements rather than replaces veterinary care. We report these figures descriptively, with no diagnostic or treatment claims.
Curious what your horse's numbers look like?
Every horse in this dataset started with one simple at-home hair sample. See where your horse stands on the same 23 elements, with a clear report and next steps.
Order a Test Kit See If It's Right for Your HorseMane Metrics provides hair and mineral analysis for educational and wellness purposes. It is not a diagnostic tool and does not replace veterinary care; share results with your veterinarian. Figures reflect Mane Metrics customer data, 2025-2026. © 2026 Mane Metrics.