Hair testing can sound complicated. It is not. The whole process is just a few clear steps, and most of the work happens at the lab. Here is exactly how equine hair testing works, from the mane to the report.
Why hair is used at all
As hair grows, it locks in a record of what was moving through the body at the time. That makes a mane sample a kind of timeline. A typical sample reflects roughly the last 90 days of growth.
Mane hair near the crest is the usual choice. It is easy to reach, easy to cut, and easy to sample the same way each time. Tail hair can be used too, but picking one spot and sticking with it keeps your results comparable.
Step 1: Collect a clean sample
This is the only part you do, and it takes a few minutes.
- Choose a clean, dry section. Skip areas with show sprays, conditioner, or dirt. These can affect the reading.
- Cut close to the crest. The newest hair grows closest to the skin, so that gives the most recent window.
- Take the amount the kit asks for. A small bundle is plenty.
- Seal and label it. Place it in the kit envelope and note your horse's details.
One honest note: how a sample is collected and handled affects the result. That is why following the kit steps matters, and why you should sample the same way every time.
Ready to start? Order a hair mineral analysis test kit and the collection supplies come with it.
Step 2: The lab runs the sample
Once your sample reaches the lab, the science begins. The lab prepares the hair and then measures it with a method called ICP-MS, which stands for inductively coupled plasma mass spectrometry.
That is a mouthful, so here is the plain version. The machine breaks the sample down and counts the atoms of each element with high sensitivity. It can measure many minerals and metals at once, even in tiny amounts. It is the same family of tools used in serious environmental and food testing.
Step 3: You get a report
The lab numbers become a report you can actually use. A good report does three things:
- Shows your horse's levels. It lists each mineral and heavy metal that was measured.
- Adds context. It marks where a value looks low, fine, or high, so you are not staring at raw numbers.
- Points to next steps. It helps you see where to focus, and what to discuss with your vet.
Remember what the report is and is not. It is a screening and tracking tool. It is not a diagnosis.
What the 90-day window means for you
Because hair reflects a few months, it is great for trends and poor for ""right now."" If you change feed today, do not expect the next sample to show it tomorrow. Plan to retest after a few months so the new hair has time to grow in.
This is also why one test is a starting point, not the finish line. The real value shows up when you compare your horse to itself over time.
What the report covers
One sample gives a lot of information. The lab measures many elements at once. They fall into two groups.
- Minerals the horse needs. Big ones like calcium, magnesium, and potassium. Trace ones like copper, zinc, manganese, and selenium.
- Metals you do not want. Things like lead and arsenic. Hair is a well-accepted way to screen for this kind of exposure.
Your report shows each value and marks where it looks low, fine, or high. That turns lab data into something you can actually read.
Common sampling mistakes
Most problems come from the sample, not the lab. Avoid these simple slip-ups:
- Dirty or sprayed hair. Show sprays and conditioners can affect the reading. Use a clean section.
- Sampling a new spot each time. That makes results hard to compare. Pick one spot and keep it.
- Taking too little. Follow the amount the kit asks for so the lab has enough to work with.
- Mixing labs. Each lab sets its own ranges. Stick with one so your trend stays clean.
Why the 90-day window matters
Hair grows slowly. A mane sample reflects a few months, not a day. So do not expect a feed change to show up next week.
Plan around this. Make your change. Wait a few months. Then retest so the new hair has grown in. This is why hair testing is built for trends, not quick checks.
Keep it consistent
One last tip ties it all together. Be consistent. Use the same lab, the same spot, and the same steps each time. That is what turns a single test into a clear trend you can trust.
Common questions
Mane or tail hair for testing?
Mane hair near the crest is the standard, and it is what our kit asks for. The key is to use the same spot each time so your results stay comparable.
How much hair is needed?
Only a small bundle. The kit tells you the exact amount, and it is far less than it sounds.
Does washing or grooming change results?
It can. Sprays, conditioners, and heavy dirt may affect readings. Use a clean, dry section of mane to keep things accurate.
How often should I test?
Many owners test a few times a year. That spacing gives new hair time to grow and makes trends easy to follow.
That is the whole process: collect, analyze, report, and track. Order a hair mineral analysis test kit and see what your horse's hair has been recording.
Sources:
1. van der Merwe D, et al. Evaluation of hair analysis for trace mineral status and toxic heavy metals in horses in the Netherlands. J Vet Diagn Invest. 2022 (PMC9597333): https://pmc.ncbi.nlm.nih.gov/articles/PMC9597333/
2. Wahl L, et al. Commercial Hair Analysis in Horses: A Tool to Assess Mineral Intake? J Equine Vet Sci. 2022 (PMID 36283587): https://pubmed.ncbi.nlm.nih.gov/36283587/
Merck Veterinary Manual. Nutritional Requirements of Horses and Other Equids: https://www.merckvetmanual.com/management-and-nutrition/nutrition-horses/nutritional-requirements-of-horses-and-other-equids