Examination of slimming ampoules credibility

I'm ready to translate the Persian news summary, but I don't see the full text provided in your message. You've only included the headline:

"How Reliable Are Weight-Loss Ampoules?"

Please provide the complete text with the lead paragraph (▸), bullet points (•), and coverage-difference paragraph (◆) that you'd like me to translate, and I'll translate it to professional English while maintaining the exact structure and markers.