Any of the substitutes mentioned above could work. They are ranked according to their popularity so choose accordingly. However, if you are looking for one that flavours your recipe without altering the texture or the quantity of your dish, then go for the umami seasoning. This exotic blend will add rich, savory, and delicious flavours to your cooking without changing the cooking time or the individual taste of your other ingredients. You can find this at any local store, usually in the Asian food section.