Dietary Treatment with Ganglioside Ganglioside will be provided in the form of a ganglioside-enriched milk fat globule membrane. This buttermilk supernatant contains protein, lactose, and 0.4% ganglioside (75% GD3, 25% GM3). Normal preparation of butter yields buttermilk. The ganglioside fraction used in this study has been centrifuged and filtered again to remove the casein and whey protein. Participants will be randomized to consume either 1.0 g of ganglioside or placebo daily for eight weeks in addition to their standard drug treatment. The placebo milk fraction does not contain ganglioside, and is equal in protein and lactose content to the ganglioside fraction.