Neem is an herb from the neem tree, which may have some potential benefits, such as supporting dental health and hair care. However, more research is necessary.

In traditional Ayurvedic medicine, people have used the bark, wood, sap, leaves, flowers, fruits, seeds, and oils from the neem tree, other names for which include Azadirachta indica and Indian lilac.

Neem may have several health benefits, but much of the available research does not involve human participants.

While some homeopathic remedies may have health benefits, in many cases, large-scale high quality scientific research is lacking. Sometimes the risks of toxicity and other side effects can outweigh the potential benefits.

Speak with a medical professional before trying any homeopathic remedies. Homeopathic remedies should not replace medical treatment and advice.

Neem is a herb that people have traditionally used for several purposes.

Skin conditions

Although there is a lack of evidence to demonstrate its effectiveness, people have been using neem to help treat many skin conditions, including:

Neem may be beneficial in treating wounds and some skin infections due to its antimicrobial properties.

Hair care

Neem may be able to reduce dandruff, which is a common scalp condition.

A 2024 study using rats found that hair gel and leave-in tonics containing rosemary and neem extracts outperformed minoxidil, the standard treatment for dandruff.

Dental care

A 2020 systematic review and meta-analysis notes that neem is one of the most common herbal ingredients used in oral care products and is more commonly used in South Asian countries. This is because of its potential anti-inflammatory, antibacterial, and antiviral properties.

The authors found that herbal toothpastes, such as those containing neem, were as effective as toothpastes that did not contain herbal ingredients at reducing dental plaque. However, the authors emphasize that the evidence is from low quality studies.

Although research is limited, a 2020 overview of research suggests that neem has the following effects:

  • antioxidant
  • anti-inflammatory
  • anticancerous
  • antidiabetic

A 2022 literature review also suggests that neem has antiarthritic and antimicrobial activities.

A 2024 article notes that, based on preclinical studies and clinical trials, neem may be a promising complementary treatment option for certain medical conditions, such as:

However, more research in humans is necessary to determine its effects and safety.

A person should speak with a doctor before considering using neem to help treat any medical condition. It is also important to continue the prescribed medication and treatment options.

Antioxidant

According to a 2021 article, various studies have shown that neem’s antioxidant properties are related to polyphenols and compounds such as azadirachtin and nimbin.

The 2020 overview of research suggests that various studies have tested the antioxidant effect of neem and its effect on the body’s natural defenses. The authors note that studies on rats demonstrated that extracts of potential compounds of neem were able to boost the body’s natural defenses.

Anti-inflammatory

Previous research suggests that limonoid, a compound found in neem, inhibits the production of inflammatory mediators in the body, reducing inflammation. It may also provide pain relief.

The authors of the review state that the anti-inflammatory properties found in certain compounds in neem play an important role in the herb’s anticancer and antidiabetic properties.

Anticancerous

A 2022 literature review notes that neem may have the potential to help treat prostate cancer when used alone or in combination with conventional treatment options, such as chemotherapy.

The authors suggest that neem and neem-based products can interfere with the processes that cause prostate cancer cell incidence, progression, and resistance to chemotherapy.

However, it is important to note that further research is necessary, and the authors state the need for clinical studies.

Antidiabetic

Studies on rats found that the leaf and bark extract of neem had a similar effect on glucose compared to insulin.

Additionally, a 2020 randomized, double-blind, placebo-controlled clinical study found that neem significantly improved high blood sugar levels and inflammation in people with type 2 diabetes.

However, it is important to note that there is still ongoing research regarding the effects and toxicity of neem extracts.

There are various ways a person can use neem:

  • using products that already contain neem, such as shampoo or toothpaste
  • applying diluted neem directly to the scalp or their own hair care products
  • chewing on neem twigs
  • applying a small amount of diluted neem oil to the skin

It is advisable to perform a patch test to check for allergic reactions.

A person should speak with a doctor about ingesting neem due to the potential risks outlined below.

Although generally considered safe for use, it is possible for someone to have an allergy or sensitivity to neem oil. Before using neem for the first time, consider doing a patch test.

It is also best to speak with a doctor before ingesting neem oil or giving it to infants. There have been cases where ingesting neem oil has resulted in the death of children. It can also be toxic to adults.

Signs a person has ingested neem oil include:

Neem products come from all parts of the Indian lilac tree. In the past, people have used neem as a natural remedy for various illnesses.

Now, many people use neem as a natural pesticide. Some use it to support their hair and dental health.

Before using neem oil, a person should speak with a doctor to avoid potential adverse effects.