The many uses for spent coffee grounds

The many uses for coffee grounds (

Coffee grounds have many uses, including skin scrubs, natural dyes, and garden fertilizers. A person should not eat coffee grounds. Learn more here.

Coffee is a beverage made from roasted coffee beans. Coffee beans grow in around 80 countries in South and Central America, the Caribbean, Africa, and Asia, and people all over the world consume the drink.

According to the International Coffee Organization, people consumed more than 166,000 bags of coffee (weighing 60 kilograms [kg] each) worldwide in 2020–2021. The United States accounted for over 30,000 of these bags.

Coffee grounds can be helpful in numerous ways. The sections below look at some of these in more detail.

Skin exfoliation product

People can mix coffee grounds with water, honey, or coconut oil to create a skin scrub that they can use all over the body.

Exfoliation gets rid of dead cells from the top layer of the skin and can unclog pores, clean the skin, and reduce acne. It may likewise make the skin look brighter and reduce the appearance of fine lines.

One 2013 study indicates that caffeic acid, an antioxidant present in coffee, may reduce premature cell aging and boost collagen levels.

Natural dye

Coffee has a strong color, and coffee grounds can dye natural fabrics to different shades of tan and brown.

One 2019 study found that coffee grounds are a potential natural dye for use on a commercial scale, as the fabrics the researchers dyed in the study stayed colorfast to industry standards.

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People can also use coffee grounds to dye their hair, although they may not produce a significant color alter or last for a long time. That said, they may be suitable for a short-term change.

According to the American Cancer Society, scientific research study has not been able to confirm whether or not commercial hair dyes cause cancer. But, some chemicals present in some hair dye products may have the potential to cause cancer.


Plants need nitrogen, phosphorus, potassium, calcium, magnesium, and sulfur to grow. Coffee grounds can conserve the nitrogen content of soil, which may benefit plant growth.

One 2019 study found that mixing coffee grounds into soil improved the nutritional appreciate of lettuce.

However, a 2016 study found that coffee grounds slowed down plant growth nevertheless retained moisture in the soil and reduced weeds. This study also demonstrated that more research study is essential to confirm the benefits of using coffee grounds as fertilizer.

Insect repellent

Coffee contains diterpenes, which are toxic to insects. This may make coffee grounds a suitable insect repellent for a person’s garden.

One 2018 study concluded that even though coffee grounds were not toxic to ants, it was an effective repellent against them.

Coffee may likewise be an effective technique of mosquito control, as a 2015 study found that mosquitoes were less likely to hatch if coffee was present in their environment.

Flea repellent

Fleas likewise do not like coffee grounds. Due to the truth that of this, a person might be able to try rubbing coffee grounds into their pet’s fur if they have fleas.

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Nevertheless, before doing so, they needs to check with a vet to make sure that this technique of flea prevention is suitable for their pet.

Caffeine is toxic to cats and dogs, so people ought to be careful not to let their pet eat coffee grounds. Caffeine poisoning can cause symptoms within around 30 minutes and be fatal.

Cleaning product

Coffee grounds are a coarse powder. This means that they are abrasive and that people can work with them to scrub surfaces, utensils, or appliances that have ingrained or hard-to-remove dirt.

That said, coffee grounds may be too rough to work with on delicate surfaces or utensils.

Odor reliever

The caffeine in carbonized coffee grounds can eliminate odors by absorbing hydrogen sulfide molecules from the air.

As a result, people can make coffee grounds into soaps to neutralize odors on the hands after cooking, for example, or to minimize odors in shoes.

Meat tenderizer

Meat tenderizers utilize enzymes to break down fibers in meat to make it softer and easier to eat. Meat tenderizing powders work with acids and enzymes from fruits such as pineapple and papaya.

Coffee grounds are acidic and contain enzymes that can also break down fibers in meat, so a person can try using coffee grounds to soften meat before cooking it.

A person can also marinate the meat in coffee or use coffee grounds as a meat rub to add flavor.

Furniture restoration product

A person can likewise utilize the strong color of coffee to restore scratched wooden furniture.

After mixing coffee grounds with water, a person can rub the resulting paste into scratches on wooden furniture to match the original color.

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As a drink, coffee may have several health benefits. These include reducing the risk of type 2 diabetes and offering high amounts of antioxidants.

Coffee is rich in a number of nutrients and has most health benefits, from anticancer activity to antioxidant action.

The antioxidants in coffee grounds include phenols, which help fight free radicals that can harm the skin.

Coffee likewise has antibacterial properties, according to one 2019 study into coffee and oral health.

Coffee may also help reduce cellulite, as a 2013 study states that caffeine can prevent the accumulation of fat in cells by limiting the activity of phosphodiesterase. This is an enzyme that controls a wide range of cell functions.

However, the Food and Drug Administration (FDA) recommends that people ingest no more than 400 milligrams of caffeine, which is equivalent to four to five cups of coffee, each day.

Some people may be more sensitive to caffeine than others, so recommended every day allowances may vary.

This article was first published here, and it was syndicated on our blog from Google News in our section about French Press Coffee.

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