What is Calcium? Is a chemical element of atomic number 20 and symbol Ca on the periodic table. A soft gray alkaline earth metal and the fifth most abundant element by mass in the Earths crust. In its pure form, it is a silvery firm element which is malleable and when burned, it emits a yellow to red flame.
How is calcium ingested by humans? Calcium is a mineral found in many foods and drinks like milk, cheese, yoghurt, seaweeds (kelp, hijiki and wakame), nuts and seeds, beans, figs, broccoli, spinach, tofu, dandelion leaves, many fortified breakfast cereals, many fortified drinks (soy milk and a variety of fruit juices), crushed eggshells - they can be ground into a powder and added to foods and/or drinks- and Some dark-green vegetables which may contain high levels of oxalic acid which reduces the bodys ability to absorb calcium.
How is calcium beneficial to the human body? Calcium is a nutrient the human body needsto maintain strong bones. Ninety-nine percent of our bodys calcium isstored in our bones and teeth, the other onepercent is found in blood. Blood calcium isnecessary to support our bodys criticalfunctions such as controlling our blood pressureand maintaining our heartbeat.
What happens if humans do not ingest sufficient calcium? The calcium in our bones makes up our bone bank. Throughout our lifetime, the calcium from the foods we eat is "deposited" in and "withdrawn" from our bone bank, depending on our needs. When our calcium intake is too low to keep our blood calcium normal, our body will "withdraw" the calcium it needs from our bones. Over time, if more calcium is taken out of our bones than is put in, the result may be thin, weak bones that may break more easily.
How much calcium the human body need per day? It is important to know the amount of calcium our body need each day. The following chart list the recommended daily calcium intake according to age and gender. Then you need this much calcium each day If this is your age and gender (mg = milligrams)Birth to 12 months Supplied by formula or breast milk1-3 700 mg4-8 1000 mg9-18 1300 mgMen 19 – 70 & Women 19 – 50 1000 mgWomen 51-70 1200mgMen and Women 71+ 1200 mg
Is a chemical element of atomic number 9 andsymbol F. A poisonous pale yellow gas of thehalogen series, it is the most reactive and highlytoxic gaseous of all the elements. In nature,fluorine will be found bonded with othersubstances, forming compounds such as calciumfluoride.
Humans do not ingest fluorine directly because is dangerous butthey do ingest fluoride which is a combination of fluorine withother elements. Fluoride is found in natural water supplies(usually in very low levels), in plants which naturally absorbfluoride from the soil, so small amounts of fluoride compoundsare present in all our food and is commonly used in pesticides(plant foods grown with pesticides will have a higherconcentration) as well as in dental products. The highest dietaryconcentration of fluoride occurs in animal foods and inprocessed foods, especially fish. Fluoride builds up in the tissuesof animals.
No, on the contrary, is very dangerous and in itspure form, is not generally available to people.However its compound elements such asfluoride is available but is not an essentialnutrient for our body because when ingested atlow levels, it can cause fluorosis which can bedental or skeletal and at high levels can evencause death.
When fluorides (an element of fluorine) are ingested by humansor laboratory animals, they are absorbed in the stomach and/orthe intestine, if it is from soluble fluorides, is almost completelyabsorbed (either as HF or F-, depending on stomach acidity); it isthen rapidly distributed in tissues. In humans and laboratoryanimals, fluorides mostly build up in bones and teeth, whichretain about 99% of the total fluoride body. Growth andremodeling of bones are generally affected by both levels ofcalcium-phosphorus and fluoride. High fluoride causes shorterand thicker bones but generally had no effect on their density,whereas high calcium-phosphorus levels increase bone density.