A natural loofah is a plant, not a sea creature and not a piece of plastic. It is the dried, fibrous skeleton of a gourd, which makes it a popular choice for people who want a plant-based alternative to synthetic shower puffs. The same open, fibrous structure that makes a loofah a good exfoliator also makes it good at trapping water and dead skin. That is why loofah care matters more than most people realize.
This guide explains where loofahs come from, why they need regular cleaning, what a Cleveland Clinic dermatologist and a 1994 microbiology study suggest for cleaning them, and when it is time for a new one. It is general information, not medical advice. If you have broken skin, a skin condition or signs of infection, ask a doctor or dermatologist what is right for you.
Where natural loofahs come from
Clemson University's Home & Garden Information Center describes luffa (also called dishcloth gourd or vegetable sponge) as a vegetable in the cucumber family. The species usually grown for sponges is smooth luffa, Luffa aegyptiaca, a warm-season annual vine. Young fruits can be eaten like squash. Left on the vine, the fruits grow larger and develop tough inner fibers. Once the skin feels loose and brittle around those hardened fibers, the gourd can be peeled, the seeds shaken out, and the fibrous interior dried for use as a sponge.
NC State Extension lists the plant as Luffa aegyptiaca, noting that Luffa cylindrica is an older name for the same species. So if you see either name on a label, it refers to the same plant.
Why loofahs need regular cleaning
The concern with loofahs is not that they are dirty when you buy them. It is what happens after weeks of use in a warm, wet bathroom.
A study published in the Journal of Clinical Microbiology in 1994 began after researchers traced a case of Pseudomonas aeruginosa folliculitis, a skin infection of the hair follicles, to a contaminated loofah sponge. In laboratory tests, the authors found that sterile loofah fragments enhanced the growth of several bacterial species, and that dead skin cells trapped in the fibers further increased this effect. Their recommendation was to decontaminate loofahs and similar exfoliating tools at regular intervals with hypochlorite bleach.
Cleveland Clinic dermatologist Melissa Piliang, MD, makes a similar point in plainer terms: loofahs are used in a wet environment and usually hung up in the shower, which is also wet, so they never totally dry out. The nooks and crannies trap dead skin cells, and fungal organisms on loofahs can cause skin infections, according to the article.
None of this means a loofah will make you sick. It does mean that how you dry and clean it makes a real difference.
Daily care: rinse, shake, dry
Cleveland Clinic's daily routine centers on drying:
- Rinse well after each use to wash out soap and loose skin.
- Shake out excess water.
- Hang it somewhere cool, preferably outside the shower, where it has the best chance of drying out between uses.
Moisture matters because, as the 1994 researchers found, loofah fibers that hold water and dead skin cells support bacterial growth.
Weekly cleaning: two common methods
Cleveland Clinic advises cleaning a loofah at least once a week, whether it is natural or plastic. It describes two methods:
Option 1: A diluted bleach soak
Soak the loofah in a diluted bleach solution for about five minutes, then rinse it very thoroughly with clean water and let it dry fully. Cleveland Clinic does not give a dilution, so follow the directions on your bleach label. (The 1994 study authors wrote of "hypochlorite (10%) bleach" without giving a soak time or frequency.)
The CDC's bleach safety guidance applies here too: never mix bleach with ammonia or any other cleaner, open windows and doors for fresh air if you are working indoors, wear gloves, and read and follow the safety instructions on the product. Rinse the loofah thoroughly afterward.
Option 2: The dishwasher
Cleveland Clinic also lists running the loofah through the dishwasher as a cleaning option. Let it dry completely afterward before using it again.
When to replace your loofah
Even with good care, a loofah does not last forever. Cleveland Clinic recommends:
- Natural loofahs: replace every three to four weeks.
- Plastic shower puffs: can last up to about two months.
- Any loofah: replace it sooner if you see mold or it smells mildewy or musty.
Tips for using a loofah more gently
Cleveland Clinic's article includes a few usage tips worth knowing:
- Skip it after shaving. Dr. Piliang says not to use your loofah for a couple of days after shaving your legs.
- Avoid sensitive areas. Dr. Piliang says never to use it on your face or genital area.
- Limit frequency. Dr. Piliang suggests using a loofah no more than twice a week.
Alternatives if you would rather not bother
If weekly cleaning and monthly replacement sound like too much, Cleveland Clinic points to a few easier-to-clean options: washcloths (which are less likely to trap debris and easier to clean and dry), silicone scrubbers and sea sponges.
The bottom line
A natural loofah is a plant-based shower tool, but it needs a little routine to stay fresh. Rinse it and hang it to dry outside the shower after every use, clean it once a week with a short diluted-bleach soak or a dishwasher cycle, and replace it every three to four weeks, or sooner if it looks or smells off.