Why haven't I learned yet?! No matter what the product is, ALWAYS read the label! I picked up some throat drop a while back. I didn't even think to read the label. Ricola lemon drops, sugar free. The "sugar free" should have been a flashing red light. If something is sugar free, the sugar is usually replaced by a chemical sweetener. In this case, aspartame. When aspartame is ingested, it breaks down into numerous things, one of which is formaldehyde. I don't know about you, but I would prefer NOT to ingest formaldehyde!