Every cell of the body has the ability to produce cholesterol. Hormones such as estrogen, progesterone, testosterone are made from cholesterol. Without these hormones, the differences between gender would not exist. Cortico steroid is made from cholesterol which regulates the water balance through the kidneys.
Through bile in the digestive system, cholesterol helps with the absorption of fats, oils, and fat-soluble vitamins. Cholesterol is secreted from glands in the skin, to heal and protect against foreign organisms, and prevents against dehydration.
One of the reasons for high cholesterol levels in the blood is that it may be acting as an antioxidant. Levels of cholesterol increase when there is a deficiency of antioxidant substances. Several antioxidants have been found to lower cholesterol levels.
High cholesterol levels are followed by hardening of the arteries. This hardening raises blood pressure because the arteries lose their resilience. Cholesterol is hard, waxy, and very resistant to breakdown. The liver can excrete a maximum of 100-300 mg. of cholesterol per day.
A diet high in animal foods can input 800-1,000 mg. per day. Within the body, HDL, High Density Lipoprotein carry cholesterol to the tissue and LDL, Low Density Lipoprotein carry it away. The LDL, which does the clean up, can remove only a limited amount of cholesterol. The higher the percentage of animal proteins you eat, the more the cholesterol that accumulates.