Don't be fooled by other brands claiming to offer the best formulation. In most cases, they are using a cheap synthetic form of elderberry which offers very little to no nutritional value to your body. Purity Labs only uses Pure Organic Elderberry. It is tested multiple times to make sure it has the consistency and quality your body needs. We only get our ingredients from the best sources possible and even though it cost us more, we know we are providing the best for our customers.