Word: bloodstreams
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Whereas other organs can make up for missing enzymes through contact with the blood, the brain is isolated from the bloodstream by a protective sheath of impermeable capillaries: the blood-brain barrier...
...drug in question is known as DHEA, a hormone secreted by the adrenal glands and also found in the bloodstream in another form, called DHEAS. The hormone first appears in humans around age seven, and its level increases until it peaks at age 25. It then begins to fall off and by age 70 is at only about 10% of its peak level. But does this suggest that replenishing DHEA in the elderly will ease some disorders of aging...
...past, some researchers had speculated that lead in bone might seep into the bloodstream during that process and pose a risk...
...their study, which was published in the Journal of the American Medical Association, Harvard researchers demonstrated a connection between lead in the mineral matrix of the bone and deficiencies in red blood cells and hemoglobin in the bloodstream...
...more promising approach is to attack the root cause of heart disease: the family of lipoproteins that carry cholesterol through the bloodstream. There are two main kinds of lipoproteins: high density ("good") and low density ("bad.") As the bad lipoproteins travel through the body, they tear at arterial walls, forming a fat-filled scar tissue called plaque. Remove the irritants, and the arteries begin to heal...