A nutritional supplement composition for normalizing impaired or deteriorating neurological function in humans is composed of: at least one agent which promotes synthesis of ATP and/or creatine phosphate in the body, at least one antioxidant for scavenging free radicals in at least one pathway in the body; at least one agent for normalizing or maintaining membrane function and structure in the body; at least one agent for normalizing or maintaining normal neurotransmitter function in the body; at least one agent for down-regulating cortisol action; and at least one agent for suppressing activation of apoptotic pathways in the body. The composition may further contain one or more of: at least one agent for suppressing inflammation in the body; at least one agent for normalizing or maintaining vascular wall function and structure in the body; at least one agent for normalizing or maintaining function of nerve growth factors and/or neurotropic factors in the body; at least one agent for suppressing toxic metal ionic effects; at least one agent for normalizing or maintaining methyl metabolism in the body; at least one agent for normalizing or maintaining metabolism of insulin and glucose in the body; and at least one agent for up-regulating activity of heat shock proteins in the body. A method for normalizing impaired neurological function in humans modulating nutrient partitioning in a human involves administering the aforementioned composition to the human, preferably on a daily basis, for a therapeutically effective period of time. Preferably, the method further involves having the human follow a stress reduction program, and/or a cognitive retraining program, and/or a dietary program designed to maximize insulin and glucose metabolism.