Tired of ants taking over your home? This natural powder could help eliminate them without harsh chemicals in minutes

From ants marching across kitchen counters to insects taking over patios and gardens, household pests often send people searching for fast solutions. While chemical pesticides remain a common choice, many homeowners are looking for natural alternatives that are effective without relying on harsh chemicals.

One such product drawing attention is diatomaceous earth (DE), a naturally occurring powder made from fossilized microscopic aquatic organisms called diatoms. The product recently gained fresh interest after Tom's Guide reported that it helped eliminate a persistent ant infestation, while experts say its insect-killing properties have been recognized for decades.

A homeowner says it worked where other remedies failed

In an article published by Tom's Guide, a homeowner described trying several home remedies, including white vinegar, citrus peels, and boiling water, to get rid of ants invading a backyard. According to the report, those methods provided only temporary relief.

The homeowner then turned to food-grade diatomaceous earth, describing it as a natural, non-toxic alternative free from harsh chemicals. After sprinkling the powder around patio cracks and areas where ants were gathering, the writer reported that the infestation began thinning out within minutes and had disappeared shortly afterwards. A fresh application during hot weather kept the ants from returning over the following week.

While the experience reflects a single user's observations, experts say the product has long been used for insect control.

What is diatomaceous earth?

According to the National Pesticide Information Center (NPIC), hosted by Oregon State University, diatomaceous earth is made from the fossilized remains of tiny aquatic organisms known as diatoms. Their skeletons are composed largely of amorphous silicon dioxide, a naturally occurring form of silica.

NPIC notes that pesticide products containing diatomaceous earth have been registered in the United States since 1960 to control insects and mites.

Today, more than 150 pesticide products containing diatomaceous earth are registered for use inside and outside buildings, in gardens, farms, and pet kennels. They are used against a wide range of pests, including ants, bedbugs, cockroaches, fleas, ticks, crickets, spiders, and mites.

How does it kill insects?

Unlike chemical insecticides, diatomaceous earth does not poison pests. According to NPIC, the powder works by absorbing the oils and fats from an insect's protective outer layer, causing the insect to lose moisture and eventually die from dehydration. Its microscopic particles also have abrasive edges that help speed up the process.

Because of this physical mode of action, the product remains effective as long as it stays dry and undisturbed.

Is it really a non-toxic alternative?

NPIC says diatomaceous earth is not poisonous and does not need to be eaten by insects to be effective. The agency also notes that the US Food and Drug Administration (FDA) classifies food-grade diatomaceous earth as "Generally Recognized as Safe" (GRAS) for certain approved uses, such as anticaking agents in animal feed and clarifying wine and beer.

However, "natural" does not mean completely risk-free. NPIC advises users to avoid breathing in the dust, as it can irritate the nose and airways. The powder may also cause temporary irritation to the eyes and dry the skin. People should always follow the product label and minimize unnecessary exposure during application.

What about pets and the environment?

According to NPIC, some registered diatomaceous earth products are approved for use on dogs and cats, but consumers should always use products exactly as directed on the label.

The agency also says diatomaceous earth is practically non-toxic to fish and aquatic invertebrates and is not known to be harmful to birds or other wildlife. Because it is made primarily of silicon dioxide, it does not readily break down in sunlight, dissolve well in water, or release vapors into the environment.