Nature Fit Soybean Refined Oil is a natural refined vegetable oil with a high content of polyunsaturated fatty acids. Soyabean oil is also rich in lecithin, sterolins, and vitamin E. Lecithin is needed by every cell in the body and is a key building block of cell membranes. Lecithin protects cells from oxidation and largely comprises the protective sheaths surrounding the brain. It is composed mostly of B vitamins, phosphoric acid, choline, linoleic acid and inositol.