Most definitely, blakleys. Cholesterol that is too low puts you at risk for certain things, just as cholesterol that is too high does.
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When cholesterol level is low, you will get ill sooner. (1)
When cholesterol level is low, it is bad for the liver and the brain. (2) Adequate cholesterol is so essential that your body warns you with depressions if your cholesterol level is too low. The lower the cholesterol level, the deeper the depression (and the more aggressive). (3) Numerous scientific investigations have shown that the cholesterol level was clearly lower in people who attempted or succeeded in committing suicide. (4)
(1) Weverling-Rijnsburger, A.W. et al, Total cholesterol and risk of mortality in the oldest old. Lancet 1997 / 350 (9085) / 1119-1123. , Forette ,B. et al, Cholesterol as risk factor for mortality in elderly women. Lancet 1989 / 1 (8643) / 868-870. , Isles, C.G. et al, Plasma cholesterol, coronary heart disease, and cancer in the Renfrew and Paisley survey. Brit. Med. J. 1989 / 298 (6678) / 920-924. , Rose, G. & M.J. Shipley, Plasma lipids and mortality : a source of error. Lancet 1980 / 1 (8167) / 523-526.
(2) Xu, G. et al, Relationship between abnormal cholesterol synthesis and retarded learning in rats. Metabolism 1998 / 47 (7) / 878-882. , Schoknecht, P.A. et al, Dietary cholesterol supplementation improves growth and behavioural response of pigs selected for genetically high and low serum cholesterol. Nutr.1994 / 124 (2) / pag.305-314. , Hague, Z.U. et al, Importance of dietary cholesterol for the maturation of mouse brain myelin. Biosc. Biotech. Biochem. 1992 / 56 (8) / 1351-1354.
(3) Golomb BA, et al, Low cholesterol and violent crime. J Psychiatr Res 2000 Jul-Oct;34(4-5):301-9. , Hillbrand M, et al, Serum cholesterol concentrations and mood states in violent psychiatric patients: an experience sampling study. J. Behav. Med. 2000 / 23 (6) / 519-529. , Rozzini, R. et al, Low serum cholesterol and serotonin metabolism. Risk of depression is higher in elderly patients with lowest cholesterol values. Brittish Medical Journal 1996 / 312 (7041) / 1298-1299. , Delva, N.J. et al, Brain serotonin (5-HT) neuroendocrine function in patients taking cholesterol- lowering drugs. Biol. Psychiatry 1996 / 39 (2) / 100-106. , Guggenheim, C.B. & H.G. Foster Jr., Serum cholesterol and perception of anger and sadness. Psychol. Rep. 1995 / 77 (3 pt 2) / 1343-1345. , Kaplan J. et al, The effects of fat and cholesterol on aggressive behaviour in monkeys. Psychosom. Med 1990 / 52 / 226-227. , Kaplan J. et al, Demonstration of an association among dietary cholesterol, central serotonergic activity, and social behaviour in monkeys. Psychosom. Med. 1994 / 56 / 479-484.
(4) Sarchiapone M, et al, Cholesterol and serotonin indices in depressed and suicidal patients. J. Affect. Disord. 2001 / 62 (3) / 217-219. , Papassotiropoulos, A. et al, The risk of acute suicidality in psychiatric inpatients increases with low plasma cholesterol. Pharmacopsychiatry 1999 / 32 (1) / 1-4. , Kunugi, H. et al, Low serum cholesterol in suicide attempers. Biol. Psychiatry 1997 / 42 (2) / 196-200. , Kaplan, J.R. et al, Assessing the observed relationship between low cholesterol and violence related mortality. Implications for suicide risk. Ann. N.Y. Acad. Sci. 1997 / 836 / 57-80. , Zureik, M. et al, Serum cholesterol concentration and death from suicide in men : Paris prospective study 1. Brit. Med. J. 1996 / 313 (7058) / 649-651. , Gallerini, M. et al, Serum cholesterol concentrations in parasuicide. Br. Med. J. 1995 / 310 (6995) / 1632-1636. , Gier, JA et al, Low serum cholesterol level and attempted suicide. Am. J. Psychiatry 1995 / 152 (3) / 419-423. , Engelberg, H. ,Low serum cholesterol and suicide. Lancet 1992 / 339 (8795) / 727-729.
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You might want to get your hands on a copy of Protein Power Lifeplan by the Eades - they address the risks of low cholesterol in detail in their second book.
Here's a link to an article about low cholesterol.
Unfortunately at this time I can't seem to find very much information on what to do to raise low cholesterol. I will keep looking though.
HTH
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