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Some phytochemicals are known phytotoxins that are toxic to humans; [19] [20] for example aristolochic acid is carcinogenic at low doses. [21] Some phytochemicals are antinutrients that interfere with the absorption of nutrients. [22] Others, such as some polyphenols and flavonoids, may be pro-oxidants in high ingested amounts. [23]
Dietary fibre from fruits, vegetables and grain foods. Insoluble dietary fibre is not absorbed in the human digestive tract but is important in maintaining the bulk of a bowel movement to avoid constipation. [5] Soluble fibre can be metabolized by bacteria residing in the large intestine.
Coenzyme Q 10 (CoQ 10 / ˌ k oʊ k j uː ˈ t ɛ n /), also known as ubiquinone, is a naturally occurring biochemical cofactor (coenzyme) and an antioxidant produced by the human body. [1] [2] [3] It can also be obtained from dietary sources, such as meat, fish, seed oils, vegetables, and dietary supplements.
Foods high in magnesium (an example of a nutrient) Human nutrition deals with the provision of essential nutrients in food that are necessary to support human life and good health. [1] Poor nutrition is a chronic problem often linked to poverty, food security, or a poor understanding of nutritional requirements. [2]
Hypoxia can affect the nutrient uptake of a plant because, without oxygen present, respiration becomes inhibited within the root cells. The nutrient film technique is a hydroponic technique in which the roots are not fully submerged. Incomplete submergence allows for adequate aeration of the roots, while a "film" thin layer of nutrient-rich ...
Vegetables play an important role in human nutrition. Most are low in fat and calories but are bulky and filling. [18] They supply dietary fiber and are important sources of essential vitamins, minerals, and trace elements. Particularly important are the antioxidant vitamins A, C, and E. When vegetables are included in the diet, there is found ...
The science of nutrition attempts to understand how and why specific dietary aspects influence health. Nutrients in food are grouped into several categories. Macronutrients are fat, protein, and carbohydrates. Micronutrients are the minerals and vitamins. Additionally, food contains water and dietary fiber.
A well-known dish is carrots julienne. [58] Together with onion and celery, carrots are one of the primary vegetables used in a mirepoix to make broths. [59] The greens are edible as a leaf vegetable, [60] [61] but are rarely eaten by humans; [62] some sources suggest that the greens contain toxic alkaloids.