i know a high salt intake can increase blood pressure but i wish to know the science behind it!
i cant find out – tried 3 a&:p books. i know its something to do with the kidneys and osmosis but thats all.
please – i need to get this essay done.
It only causes it some people. The science is that you need to retain water when you consume salt. The more water in a water balloon, the more pressure. See water weight on site below for a thorough explanation. If you put 4 ounces of salt in water and you drink it, what happens? You die! Salt is not and never was a food. Due to this water retention Beyonce lost 20 pounds in 10 days with the lemonade diet. It is mostly a loss of water since the body dumps all this excess salt (sodium).
It is very simplistic and is easily explained in ‘Janet and John’ fashion, which is how we would explain it to school children….
And is basically the same for sugar and diabetes too.
Too much salt or sugar basically thickens the blood and it becomes a compounded circle because the human body is a very efficient machine with no sympathies and simple logic to ensure its own survival…..
Too much of either means that via the process of osmosis, which is the equalling out of liquid thicknesses through a connecting membrane, the body draws liquids from where ever it can in an effort to water down the salt/sugar so you can pee it out.
Several things therefore happen. You become thirsty, and also can depending on how thick your blood becomes, commence headaches and a general feeling of being unwell. All of these are your bodies way of ringing the alarm bells. As your blood thickens, it becomes more difficult to pump, hence the high blood pressure and in an effort to survive the body will take any moisture it can get from within your body if you fail to drink enough.
Liquid can and will be taken from your organs, and the last resort is from your eyes… hence the blindness that comes with diabetes and the lack of circulation which can lead to loss of limbs. Your body sees blindness as better than dying so will do what it needs to do to survive…..
Hope that makes sense, any more info can be gleaned from Diabetes UK who cover sugar in great detail and its effects which mirror salt in your blood stream…..
Over the long term it hardens your arteries, not allowing them to expand when required. When you run or exercise the flow of blood must increase, arteries expand to cope with this additional blood volume. If the arteries can not expand then the pressure in the arteries increases to cope with the extra flow of blood required.
Salt is required by the body to help us sweat. In extreme cases without the ability to sweat you would suffer heat exhaustion. Athletes would therefore have a higher salt requirement.
About 5-6 grams of salt per day is the normal. Most fruit veg and meat contain enough salt so you should never have to add salt to a meal.
Most ready made meals are bad as they add extra salt as a flavouring instead of using herbs and spices. I think this is done as a cost saving though it could just be ignorance.
The body must maintain a sodium, potassium balance in order for the body chemistry to be maintained. Short term overload of either (especially potassium) will lead to headaches. Avoid eating too many bananas at once they are overloaded with potassium.
Some people are ":salt sensitive": which means that consumption of salt can increase their blood pressure. Those individuals are most likely people with kidney disease, people of arican descent, that inherited through genetics, or the elderly.If they have high blood or hypertension, it is a major factor effecting their chances of heart attack &: stroke and is usually caused by a high intake of salt.
I’m not sure about the kidneys and osmosis but some have suggested that since salt intakes are related to blood pressure, and since cardiovascular risks are also related to blood pressure, that, surely, salt intake levels are related to cardiovascular risk. In one of my cardiovascular section of one of my classess at my university, we called it the ":sodium hypothesis.": This subject is actually a part of major controversy that many are stillt rying to prove today, so I doubt that you can find the full information that has science behind it :/
Sorry, but that’s all the information I have.
Otherwise, you should try yahoo-ing or google-ing it.
Salt is a solute, so osmosis plays a role here. If the kidneys retain Na+ (meaning too much salt in the bloodstream), this in turn will cause water retention and therefore higher blood pressure. Some people are sodium sensitive, and excessive Na+ intake will cause vasoconstriction and excessive fluid retention. More fluid volume + vasoconstriction = high blood pressure.
Sorry can’t really add any science to what has already been given . All I know is that my mum used to chastise me about adding so much salt to things , and that I ate too many salty foods . She said it was bad for the blood , but I unfortunately took little notice , result I now have to take medication for high blood pressure !!
Salt has the property of retaining water in your body therefore increasing the amount of blood in your circulatory system, Blood pressure is the force of blood pressing against the walls of the arteries, as the heart pumps blood around the body. therefore if the volume of blood increases by the additional water retained by the salt the blood pressure rises.
Most of the salt is already contained in the food we eat even if we do not add extra salt.
The amount of salt that we eat has a direct effect on our blood pressure. The more salt we eat, the higher our blood pressure. This is true, not only in people with high blood pressure, but also in people with normal blood pressure. A high salt intake also causes other health damage such as greater retention of water in your body, which leads to swelling of the ankles. Too much salt also worsens thinning of the bones (osteoporosis), asthma and kidney disease and is closely related to cancer of the stomach. Therefore, everyone should cut the amount of salt they eat.
pressure have no symptoms and don’t realise they have it.
People with high blood pressure are three times more likely to develop heart disease or have a stroke than people with normal blood pressure. And they are twice as likely to die from these diseases. If it isn’t treated, high blood pressure can also lead to kidney failure and eye damage.
Eating less salt can lower blood pressure and reduce the risk of heart disease and stroke.
The Department of Health and Food Standards Agency recommend that everyone should cut their salt intake from the current amount of 10 to 12 grams of salt a day to 5 to 6 grams a day, or less. If you can reduce salt intake more, this will lower your blood pressure further.
If you never sprinkled salt ever again on your plate you’d still be getting to much salt due manufactured food requiring salt for an extended shelf life. so my answer is make your own bread and don’t buy stuff off shop shelf’s as they all have salt. If we all do this manufacturers will soon get the message. Salt is in every natural thing we eat and all that our bodies require for it’s health, only you can look after your own body.