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A-Z NUTRITION GLOSSARY:
 
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Insoluble fibre
Insoluble fibre is a very powerful GI tract stimulant. Unlike fat, however, you cannot simply minimize your insoluble fibre intake, as this will leave you with a seriously unhealthy diet. n general, if a plant food (no animal products contain fibre) seems rough, stringy, has a tough skin, hull, peel, pod, or seeds, be careful, as it's likely very high in insoluble fibre.

This is not a comprehensive list of insoluble fibre foods by any means but it should give you the general idea. Some examples are whole wheat flour, whole wheat bread, whole wheat cereal, Wheat bran, whole grains, whole grain breads, whole grain cereals, granola, seeds, nuts, popcorn, beans and lentils, blueberries, strawberries, blackberries, cranberries, etc., grapes and raisins, cherries, pineapple, peaches, nectarines, apricots, pears with skins, apples, rhubarb, melons, oranges, grapefruits, lemons, limes, dates and prunes, spinach, lettuce, kale, mesclun, collards, arugala, watercress, etc., whole peas, snow peas, snap peas, pea pods, green beans, kernel corn, bell peppers, eggplant, celery, onions, shallots, leeks, scallions, garlic, cabbage, bok choy, Brussels sprouts, broccoli, cauliflower, tomatoes, cucumbers, sprouts, alfalfa, sunflower, radish, fresh herbs, and the list goes on.

Insulin
Insulin is a hormone that's secreted by your pancreas to help regulate blood sugar level and promotes glycogen storage. Individuals with diabetes mellitus supplement insulin to make up for their body's inability to produce sufficient amounts.
 
Iron
Iron is one of the human body’s essential minerals. It forms part of hemoglobin, the component of the blood that carries oxygen throughout the body. People with iron-poor blood tire easily because their bodies are starved for oxygen. Iron is also part of myoglobin, which helps muscles store oxygen. With insufficient iron, adenosine triphosphate (ATP; the fuel the body runs on) cannot be properly synthesized. As a result, some iron-deficient people can become fatigued even when they are not anemic.
 
Isoflavones
Isoflavones are natural plant hormones that can be found in many foods but the best known source is the soy bean. The soy isoflavones are responsible for most of the soy health benefits. The Soy bean is a plant cultivated as foodstuff whose health properties have recently been discovered. Another source of isoflavones is red clover. As opposed to soy beans, red clover is normally not eaten but the isoflavones are extracted in industrial processes and used to make isoflavones supplements.
 
Isoleucine
Isoleucine is one of the 20 basic amino acids, and forms part of the structure of almost all proteins. It is coded for in DNA. Its chemical composition is identical to that of leucine, but the arrangement of its atoms is slightly different, resulting in different properties. Nutritionally, in humans, isoleucine is an essential amino acid. Isoleucine is a hydrophobic amino acid. Rich sources of isoleucine are eggs, chicken, pork, mutton, pulses, soya beans, cottage cheese, milk, piyal seeds, cashew nuts, and cereal grains.
 
Isomer
An isomer is a variation in the arrangement of atoms in two or more otherwise similar chemical compounds.