A miswak does not expire, and one stick lasts about a month

No expiry date is printed on a miswak, but after its out of the vacuum seal the stick doesn’t forever either. A 2024 study handed sticks to 24 people and checked them a month later, and most were carrying bacteria by then, so replace yours once a month.1

Use your miswak for two minutes, twice a day, which is the time dentists ask of anyone with a toothbrush.

84%

of sticks picked up bacteria within a month2024 study, reference 1

1 month

then start a fresh stick

How to use miswak

Eight steps, from the first cut to the last day

1

Trim the tip

Cut a centimeter of bark off one end to reach the pale fiber underneath.

2

Chew it soft

Chew the bare tip until the fibers open out into a brush, because chewing is what makes the part that kills bacteria.

3

Brush gently

Let the fibers do the work instead of pressing with your hand, because pressure is what hurts your gums.

4

Angle it at the gumline

Hold the head at a slight angle where the tooth meets the gum, and use short strokes.

Miswak
5

Rinse it

Rinse the head, shake the water off, and then stand it up to dry.

6

Store it dry

Stand it tip up in open air, and never seal it inside a case.

7

Trim back every day or two

Cut the used head off so fresh fiber is exposed, because old fiber holds on to bacteria.

8

Replace it monthly

Start a new stick after a month, however carefully you stored the old one.

Sources: chewing3, pressure 2 , replacement1.

More About Gums

Hard brushing is what pulls gums back, not the plant

Gums pull back more often among people who use a miswak, but a 2025 review traced the damage to how hard and how
often those people brushed rather than to the miswak itself.2

  • Too hard

    Sore gums after brushing

    The stick hardly bends under your hand and your gums ache afterwards, so you are pressing far too hard.

  • About right

    The fibers do the work

    The fibers splay out and take the load, so your hand guides the stick rather than pushing it.
Research trials found that a miswak does the most good alongside a toothbrush, and the numbers are on our comparison page.4 Researchers have said since 2001 that a miswak only works properly when the technique is right, which is why we wrote all eight steps out.5

Who should take extra care

If your gums have pulled back, or your teeth are sensitive, keep the pressure light and ask your dentist. A chewed tip is a choking risk, so watch any child using one.

Damp storage is what ruins a stick

A bathroom is warm and closed in, so a sealed case or a cup of water keeps the fiber wet, and wet fiber grows mold.

If your stick turns black, throw it away rather than trimming past the mark, and read why a miswak turns black.

Questions

Questions People Ask

Does a miswak expire?

No expiry date is printed on a miswak, but change yours every month, because a 2024 study found bacteria on 84% of sticks.

How many minutes should I use a miswak?

Two minutes, twice a day, and split the time so that every surface of every tooth gets brushed

Why is my miswak turning black?

Black marks usually mean mold has grown in damp fiber, so throw that stick away.

Should I still use a toothbrush?

Yes, because a miswak does the most good alongside brushing rather than instead of it.

References

Sources and references

Nothing here is medical advice or a clinical claim.

  1. Altintepe Dogan, S. S., Ugur, S. G., Dogan, O. et al. (2024). Evaluation of bacterial contamination of miswak toothbrushes in different storage environments: an experimental study. Annals of Medical Research, 31(3):190 to 198. Read the paper
  2. Suleman, N., Sidrak, M., Noussair, J. et al. (2025). The prevalence of gingival recession among miswak (Salvadora persica L.) chewing stick users: a systematic review. Journal of Herbal Medicine, 51:101003. Read the paper
  3. Sofrata, A., Santangelo, E. M., Azeem, M. et al. (2011). Benzyl isothiocyanate, a major component from the roots of Salvadora persica is highly active against Gram-negative bacteria. PLOS ONE, 6(8):e23045. Read the paper
  4. Ramli, H., Mohd-Dom, T. N., Mohd-Said, S. et al. (2022). The effectiveness of miswak practices in reducing plaque and gingivitis among adults: a systematic review and meta-analysis. Journal of Ethnopharmacology, 298:115598. Read the paper
  5. Wu, C. D., Darout, I. A., Skaug, N. (2001). Chewing sticks: timeless natural toothbrushes for oral cleansing. Journal of Periodontal Research, 36(5):275 to 284. Read the paper

Published research, not medical advice. See a dentist about bleeding gums.

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