There are instances the place both vegetarian and non-vegetarian sources can be found for a given ingredient, but some manufacturers told us that they use vegetarian sources only. Since we cannot generalize this to all suppliers, now we have categorized these ingredients as usually vegetarian, sometimes vegan, usually non-vegetarian, or could also be non-vegetarian, relying on the data received from manufacturers. On this Guide, commercial sources might be listed within the order of the most commonly used to the least commonly used, amino acids manufacturer near me based on the data acquired from manufacturers.