genio Posted February 28 Posted February 28 I'd like to create a total mg/dL blood cholesterol table that equates to a percentage of total cholesterol in the blood. Quote So, a milligram is a thousandth of a thousandth of a kilogram, and a milliliter is a thousandth of a liter. Notice there is an extra thousandth on the weight unit. Therefore, there must be 1,000 milligrams in a milliliter, making the formula for mg to ml conversion: mL = mg / 1000 https://www.omnicalculator.com/conversion/mg-to-ml 100mg/dL total blood cholesterol in % ? 1dL = 100mL 100mg/1000=0.1mL 0.1mL is 0.1% of 100mL ? 0.1% is 100mg/dL of total blood cholesterol ? Then to saturate the blood at 100% total cholesterol; total blood cholesterol would need to be x in mg/dL. 100/0.1=1000 100mg/dL x 1000 = 100000mg/dL to 100% saturate the blood with total cholesterol ? Is this correct or is "mL = mg / 1000" incorrect when applied to total cholesterol?
exchemist Posted February 28 Posted February 28 3 hours ago, genio said: I'd like to create a total mg/dL blood cholesterol table that equates to a percentage of total cholesterol in the blood. 100mg/dL total blood cholesterol in % ? 1dL = 100mL 100mg/1000=0.1mL 0.1mL is 0.1% of 100mL ? 0.1% is 100mg/dL of total blood cholesterol ? Then to saturate the blood at 100% total cholesterol; total blood cholesterol would need to be x in mg/dL. 100/0.1=1000 100mg/dL x 1000 = 100000mg/dL to 100% saturate the blood with total cholesterol ? Is this correct or is "mL = mg / 1000" incorrect when applied to total cholesterol? Since there are 10⁶ ml in one litre of water, there are 10⁵ml in one dL. Equating 1mg with 1ml is only valid for substances with a density of 1g/ml (or 1000kg/m³ in SI units). So-called "cholesterol" in blood is not in fact the chemical substance cholesterol, but particles made up of a range of substances including fatty acids, esterified and unesterified cholesterol, proteins etc. From what I can find on the web, these particles have densities ranging from approx 1.05-1.2g/ml. (Blood plasma has a density of 1.006g/ml , apparently.) The chart I found is this one: https://www.nature.com/articles/s41598-021-95451-3/figures/1 Whether these differences in density are significant or not in the context of your enquiry I do not know. 1
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