All Natural Oyster Flavored Sauce All Natural. Gluten Free. An 'All Natural' Oyster Sauce? You bet! No junk, just 100% natural ingredients. No MSG, no sodium benzoate, no gluten, no modified corn starch. We even use evaporated cane juice rather than sugar. What Wok Mei Oyster Sauce does have, however, is a rich, authentic Chinese Oyster Sauce flavor! Use it for all your Chinese cooking. We use it as a base for all our stir-frying. It makes a great, rich and dark sauce in our wok. Use it as a start to discovering the wonderful, rich flavors of the orient.