In the article on cholesterol, Gail Vines does not state how the cholesterol in low-density lipoproteins and in high-density lipoproteins is measured, the only mention is of total cholesterol. ('Diet, drugs and heart disease', 25 February).
If the latter is low, then there is no worry; if it is high and that is mostly in the HDLs, then there is again no worry. She does not say if the reflotrons which some surgeries are using measure the total cholesterol or each of the LDLs and HDLs.
It would interest many if these points could be cleared up.
Norman Entwistle Shipley West Yorkshire
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