Wish I could be of more help giving specific advice to readers of this here article as to what makes a good blend and what constitutes a poorly made blend, but the above advice is the best I can do under the circumstances. Although a "proprietary blend" is not by default a negative to the consumer, it is by all means the poster child for the well-known Latin term Caveat emptor which translates into English as "let the buyer beware".

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