Which nutrient comes from plant-based foods and is not classified as a vitamin?

The correct answer is phytochemicals. These are natural bioactive compounds produced by plants, recognized for their potential health benefits. Unlike vitamins, which are specific organic compounds essential for various bodily functions, phytochemicals are not necessary for basic survival but may offer antioxidant properties, support the immune system, and promote overall health.

Phytochemicals are found in fruits, vegetables, grains, and legumes and contribute to the color, flavor, and disease resistance in plants. They can play a role in reducing the risk of certain chronic diseases and are a focus of much nutritional research.

Other nutrients mentioned, such as carbohydrates, fatty acids, and proteins, are fundamental macronutrients essential for energy and body function. Carbohydrates provide a primary energy source, proteins are the building blocks for tissues, and fatty acids are critical for hormone production and cell structure. However, these categories are classified as macronutrients or micronutrients (like vitamins and minerals), rather than phytochemicals, which are considered non-nutritive compounds with potential health benefits.