Friday, 9 November 2012

Common habitats and its effects, tea,coffee, sugar, salt,fried food , acidic food


Tea


Tea contains a number of substances like caffeine, essential oils, enzymes, tannins and phonologic compounds.

Effect on body
  • Their effects on the body vary and are numerous:It’s a diuretic, stimulates the central nervous systems and respiratory system.Tea also dilates blood vessels and speeds up the heart rate.Boosts up striated muscles. It delays mental and muscular fatigue.
  • Tannins and Tea – hinder the absorption of iron found in vegetables, fruits, cereals meats, eggs and diary products.Drinking tea frequently helps in relieving headaches, irritability, tense muscles and nervousness.
Coffee


The beans in coffee contain about a hundred different substances including caffeine, tannins, oils and nitrogenous substances.

Effect on body
  • Coffee is a diuretic. It stimulates the central nervous system and respiratory system.It dilates the blood vessels and speeds up the heart rate.It boosts up striated muscles and delays mental and muscular fatigue. People who drink too much coffee may suffer irritability, nervousness and headaches.
  • To date, health studies have failed to show a link between caffeine consumption and high blood pressure, cancer or congenital effects.
  • Women are nevertheless advised to drink moderated amounts of coffee as for pregnant and breast feeding mothers. Caffeine filters through the placenta and is found in mother’s milk. Caffeine has its undesirable effect on sleep during four hours following the consumption of coffee

Sugar



Sugar has little nutritional value, as it contains no proteins, fats or fibers. It lacks vitamins and minerals. It mainly contains carbohydrates. Therefore sugar is known to be a source of empty calorie because of its deficiency in nutrients.

Effect on body
  • Too much consumption (specially sucrose) cavities as chewy food tends to stick to the teeth enamel.
  • There is no evidence that sugar consumption leads to the development of heart disease, obesity or behavioral changes in children.
  • Like salt, sugar tends to absorb liquid, which is why people often feel thirsty after eating sweet food.

Salt



Most of our salt intake (77%) comes from food products. Salt is said to be an invisible food as, we are often unaware of how much salt is added to foods. Our ability to detect saltiness decreases as, we become accustomed to seasonings.Sodium plays a number of vital roles, contributing to the metabolizing of proteins and carbohydrates.Transmission of nerve impulses Contraction of muscles and hormone regulation.Consumption of oxygen by cells Controlling urine production, thirst and production of lipids (blood, saliva, tears, perspiration, gastric juices, bile).Salt is also essential for the production of hydrochloric acid in the stomach.

Effect on body
  • Excessive salt consumption, can lead to water retention, which boosts the heart rate and increases blood pressure above normal levels.
  • Over consumption of salt has a negative impact on health. It may lead to hypertension and cardio vascular diseases.
  • People having strictly salt free diets suffer from diarrhea. Persons having salt deficiency may suffer from Vomiting or heavy prolonged sweating.
Fried Food


Oil contains neither proteins nor carbohydrates. Vegetable oils do not contain cholesterol. Oil is also a valuable source of energy and provides vitamin A, vitamin D and vitamin E.

Effect on body
  • Fried foods have a high fat content and are energy dense. Therefore this could lead to undesirable weight gain.
  • Frying alters the chemical composition in the oil. It leads to the development of non-toxic and non-volatile decomposition of products like acrolein, which is a carcinogen.
  • The natural forms of fat at high temperatures may change into trans-fatty acids. This may increase the cholesterol levels and reduce HDL (high density lipoproteins) levels, thus increasing the risk of coronary heart diseases.
  • Frying also causes loss of nutrients.Fried foods are heavy, hence are not suitable for persons suffering form indigestion
Acidic Food


Generally acids are produced by metabolic activities (such as uric acid, lactic acid), which react with alkalis in the blood and neutralizes the lymphs.

Effect on body
  • Excessive acid in the body results in symptoms like fatigue, headache, anorexia, insomnia and nervous tension.
  • Excessive acid is neutralized by sodium, which acts as a buffer. In case of excessive acidity sodium can no longer buffer the accumulated acid.
  • Calcium is leached from the bones if the diet does not contain enough of calcium. It results in weakening the bones and leads to a condition called as osteoporosis.
  • Chronic acidity is an unhealthy condition that causes faster degeneration and ageing in the body.

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