La Tourangelle Walnut Oil - Walnut oil is one of richest sources of polyunsaturated fat in nature (72% by content, representing 60% linolenic acid and 12% alpha-linolenic acid). Since the oil is not refined, it has a very high level of natural anti-oxidant and essential fatty acids. With 12% of alpha-linolenic acid, Walnut oil is also a great source of omega 3: one tablespoon brings 1.4g of Omega 3.