I bought mine elsewhere, but the expiration date is far away so it is not old or stale. In the past I've used nutritional yeast, including Frontier brand, and liked it. However, my latest bag of it was terrible. It has a nearly gagging effect when tasted - strong and foul. Adding seasoning, etc. did not help. Last night I started a batch of kale crackers with the nutritional yeast in the food dehydrator, and my home has been reeking of the yeast, despite the lemon juice, garlic, and chia seeds that were added to the cracker batter. It's just disgusting, so this morning I threw out the remainder of the yeast.