At-home collection guide
HTMA Test: What to Expect
What it measures
Hair Tissue Mineral Analysis measures mineral content — such as magnesium, calcium, zinc, and sodium — and certain heavy metals in a hair sample. Because hair grows over months, practitioners use it as a longer-term view of mineral status, complementing blood tests that capture a single moment.
How the sample is typically taken
Kits ask for a small amount of hair — commonly around a tablespoon by volume — cut close to the scalp, usually from the back of the head at the nape, using the first inch to inch and a half nearest the scalp since that's the most recent growth. Clean, dry hair is standard, and many kits ask you to wait a period after chemical treatments like coloring or perming, since treatments can affect readings; your kit states its specific waiting guidance.
Preparation notes
Wash hair normally before sampling and avoid leave-in products on collection day. If your hair is very short, kits typically explain how to gather sufficient sample from multiple spots. Package the sample in the provided envelope, complete the paperwork, and mail it back — hair is stable, so shipping timing is more forgiving than with other tests.
Helpful details
Frequently asked questions
- How much hair does an HTMA test need?
- Typically about a tablespoon's worth, taken close to the scalp from the back of the head, using the inch to inch and a half of most recent growth. Your kit specifies its exact amount.
- Does colored or treated hair affect HTMA?
- Chemical treatments can influence mineral readings, so kits commonly advise waiting a stated period after coloring or perming before sampling.
- What is HTMA used for?
- Practitioners use hair mineral analysis as a longer-term picture of mineral status and heavy-metal exposure, alongside other testing and clinical context.
Get prepared before your kit arrives.
A short email guide covering the most common at-home lab tests — collection tips, timing, and mistakes to avoid.
This site is for educational purposes only and is not medical advice, diagnosis, or treatment. Lab testing decisions and result interpretation belong with your qualified healthcare provider.