You are what you eat -- and breathe for that matter. So unless you're a strict vegan living in a plastic bubble, that may mean you're a toxic mass of chemicals, environmental pollutants, drugs, meat products, and fats. In fact, "the average intestinal tract has as much bacteria as the septic tank under a house," according to the Sacred Space Healing Center's Web site. This one-stop shop for all of your holistic needs in the Lower Haight is an alternative to conventional medicine, offering an assortment of detoxification and cleansing programs that can get your internal organs functioning at optimal capacities in no time. In a matter of weeks, the center claims, your kidney can be gloriously free of pesky stones and your liver and intestinal tract rid of parasites. All programs begin with a health assessment, and staff nutritionist Anusha Amen-Ra offers novices support and counseling. Other services include three- to 14-day fasting retreats; classes in yoga, Pilates, and Middle Eastern dance; massage; and an idyllic garden sauna.