A nutraceutical is a substance that is derived from food sources and has health benefits in addition to its nutritional value. It is a combination of the words "nutrient" and "pharmaceutical." 

Nutraceuticals can include: vitamins, minerals, herbs, probiotics, and antioxidants. 

They are believed to have the potential to prevent or treat chronic diseases, such as cancer, heart disease, and diabetes. However, it is important to note that the scientific evidence supporting the health benefits of many nutraceuticals is limited. 

Some examples of nutraceuticals include:

Lycopene from tomatoes, which may help protect against prostate cancer 

Omega-3 fatty acids from fish oil, which may reduce the risk of heart disease 

Probiotics from yogurt, which may improve gut health 

It is essential to consult with a healthcare professional before consuming any nutraceuticals, as they may interact with medications or have other potential side effects