Cholesterol breaks down into pregnenoline, DHEA, and progesterone via thyroid hormone. I would suggest looking at thyroid function to the cause of raised cholesterol. You could test your DHEA and pregnenolone blood levels.
Further, you probably want to examine whether reduced cholesterol actually has a benefit, especially if artificially driven through statins use, rather than through good thyroid function leading to cholesterol breaking down into downstream hormones as above:
Lancet. 2001 Aug 4;358(9279):351-5.
Cholesterol and all-cause mortality in elderly people from the Honolulu Heart Program: a cohort study.
Schatz IJ, Masaki K, Yano K, Chen R, Rodriguez BL, Curb JD.
BACKGROUND:
A generally held belief is that cholesterol concentrations should be kept low to lessen the risk of cardiovascular disease. However, studies of the relation between serum cholesterol and all-cause mortality in elderly people have shown contrasting results. To investigate these discrepancies, we did a longitudinal assessment of changes in both lipid and serum cholesterol concentrations over 20 years, and compared them with mortality.
METHODS:
Lipid and serum cholesterol concentrations were measured in 3572 Japanese/American men (aged 71-93 years) as part of the Honolulu Heart Program. We compared changes in these concentrations over 20 years with all-cause mortality using three different Cox proportional hazards models.
FINDINGS:
Mean cholesterol fell significantly with increasing age. Age-adjusted mortality rates were 68.3, 48.9, 41.1, and 43.3 for the first to fourth quartiles of cholesterol concentrations, respectively. Relative risks for mortality were 0.72 (95% CI 0.60-0.87), 0.60 (0.49-0.74), and 0.65 (0.53-0.80), in the second, third, and fourth quartiles, respectively, with quartile 1 as reference. A Cox proportional hazard model assessed changes in cholesterol concentrations between examinations three and four. Only the group with low cholesterol concentration at both examinations had a significant association with mortality (risk ratio 1.64, 95% CI 1.13-2.36).
INTERPRETATION:
We have been unable to explain our results. These data cast doubt on the scientific justification for lowering cholesterol to very low concentrations (<4.65 mmol/L) in elderly people.
BMJ. 1990 Aug 11;301(6747):309-14.
Lowering cholesterol concentrations and mortality: a quantitative review of primary prevention trials.
Muldoon MF, Manuck SB, Matthews KA.
OBJECTIVE:
To determine the effects of lowering cholesterol concentrations on total and cause specific mortality in randomised primary prevention trials.
DESIGN:
Qualitative (meta-analytic) evaluation of total mortality from coronary heart disease, cancer, and causes not related to illness in six primary prevention trials of cholesterol reduction (mean duration of treatment 4.8 years).
PATIENTS:
24,847 Male participants; mean age 47.5 years.
MAIN OUTCOME MEASURES:
Total and cause specific mortalities.
RESULTS:
Follow up periods totalled 119,000 person years, during which 1147 deaths occurred. Mortality from coronary heart disease tended to be lower in men receiving interventions to reduce cholesterol concentrations compared with mortality in control subjects (p = 0.06), although total mortality was not affected by treatment.
No consistent relation was found between reduction of cholesterol concentrations and mortality from cancer, but there was a significant increase in deaths not related to illness (deaths from accidents, suicide, or violence) in groups receiving treatment to lower cholesterol concentrations relative to controls (p = 0.004). When drug trials were analysed separately the treatment was found to reduce mortality from coronary heart disease significantly (p = 0.04).
CONCLUSIONS:
The association between reduction of cholesterol concentrations and deaths not related to illness warrants further investigation. Additionally, the failure of cholesterol lowering to affect overall survival justifies a more cautious appraisal of the probable benefits of reducing cholesterol concentrations in the general population.