Calcium levels do slightly vary on a daily basis but only in small amounts, not in extremes. We have such a huge store of calcium that it is highly regulated and is usually is not a problem in most individuals. There are always exceptions of course.
Physicians say that Osteoporosis is a condition where the calcium level has been low and adjusted so many times over the years that the bones lose calcium and become brittle and weak. I disagree in terminology. I say that Osteoporosis occurs because so much acid has been buffered over the years by phosphate that the bones lose their calcium and become brittle and weak. Calcium is joined with phosphate so if you remove one, you have to remove the other. Supplementing with calcium and Vit D for this doesn't hit the root of the problem, not enough phosphate and an overly acidic diet.
I am not educated enough to comment on specific calcium levels on a regular daily basis. Someone who works in a lab and sees frequent levels may be able to help, but it is a question that most physicians couldn't even answer.
Your positively charged ions, or cations, are your minerals/metals like calcium, magnesium, zinc, selenium, boron, copper, manganese, molybdenum, iron, lithium, and I'm sure I'm leaving some out. These minerals/metals share a similar positive charge with harmful minerals/metals like mercury, lead, aluminum, chromium, thallium, nickel, arsenic, uranium, tin, tungsten, cesium, barium, and many others. The only difference in these agents is their physical size, their valence or electron charge, and their affinity to give or acquire electrons.
A problem with many of us is that under the acidic environment of inflammation, minerals are lost during the inflammatory process and the extra acid gives electrons to minerals/metals that are present. This is called reduction. This is the exact opposite from oxidation which is when an agent loses an electron or gains an oxygen. This is how reactive oxygen species (ROS) are formed. They are harmful and detrimental to our health.
The oxidative state of these minerals/metals become less than desired due to the available protons and metals that normally won't react with receptors start reacting and binding in
locations we don't want them. They essentially block reactions and push reactions we don't want to occur. Essential proteins, (I'll use ceruloplasmin for instance) may become depleted because instead of binding copper and aiding in iron metabolism, they bind nickel or another another metal that has been reduced. With not enough ceruloplasmin, copper blood levels can rise and unbound copper is very harmful to the body not to mention that copper is a substrate for so many reactions in the body. This same scenario occurs with magnesium and manganese.
When we need calcium, we just take it from our bones. When we need these other cations, we either eat them or suffer.
Post Edited (Georgia Hunter) : 2/13/2016 10:01:38 AM (GMT-7)