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This is exactly why transparency in skincare marketing matters. To the average consumer, when a product says “10% azelaic acid”, of course you would assume you’re getting something comparable to a true 10% azelaic acid treatment. But chemistry is not always that simple. If the pH is pushed too high, or if the formula is relying on azelaic acid salts or derivatives, the amount of free azelaic acid available to the skin can be dramatically different from what the front of the bottle suggests. And
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