Secondary hyperlipoproteinaemia necessitates direct management of the main disease (hypothyroidism, nephrosis, etc.), whereas primary forms are essentially handled by dietary regimens adapted to subject types, as classified by Fredrickson-Levy-Lees and adopted by the WHO. These regimens are described and discussed schematically. Drugs may be employed if diet proves ineffectual. Anionic exchange resins, d-thyroxine, clofibrate and nicotinic acid have been shown effective for this purpose. Their mechanisms, doses and side-effects are described. The criteria governing their selection are explained in the light of the recent literature and with reference to the six phenotypes proposed by Fredrickson-Levy-Lees.