WILL & DENI MCINTYRE / SCIENCE PHOTO LIBRARY WILL & DENI MCINTYRE / SCIENCE PHOTO LIBRARY
Blood cholesterol analysis, showing the blue colouration on a test strip after the addition of a drop of blood removed by pricking the subject's finger. The tab is placed in a device (a Reflotron) which electronically converts this colour level into a numerical value, expressed in mg of cholesterol per decilitres of blood. The amount of saturated (mostly animal-derived) fats in the diet is the main influence of blood cholesterol levels. High values are implicated in coronary heart disease & obesity & demand reduction through change in diet.
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