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  • Title: Experimental atherosclerosis in rabbits fed cholesterol-free diets.
    Author: Kritchevsky D, Tepper SA, Bises G, Klurfeld DM.
    Journal: Atherosclerosis; 1982 Feb; 41(2-3):279-84. PubMed ID: 7066076.
    Abstract:
    Rabbits were fed a semipurified, cholesterol-free atherogenic diet containing 40% sucrose, 25% casein, 14% fat, 15% fiber, 5% salt mix and 1% vitamin mix. The fats were corn oil (CO), palm kernel oil (PO), cocoa butter (CB), and coconut oil (CNO). The rabbits were bled at 3, 6, and 9 months and killed at 9 months. Serum lipids of rabbits fed CO were unaffected. Serum cholesterol levels (mg/dl) at 9 months were: CO -- 64; PO -- 436; CB -- 220; and CNO -- 474. HDL-cholesterol (%) was: CO -- 37; PO -- 8.6; CB -- 25.1; and CNO -- 7.0. Average atherosclerosis (arch + thoracic/2) was: CO -- 0.15; PO -- 1.28; CB -- 0.53; and CNO -- 1.60. Cocoa butter (iodine value 33) is significantly less cholesterolemic and atherogenic than palm oil (iodine value 17) or coconut oil (iodine value 6). The difference between the atherogenic effects of cocoa butter and palm oil may lie in the fact that about half of the fatty acids of palm oil are C 16 or shorter, whereas 76% of the fatty acids of cocoa butter are C 18 or longer.
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