Okay, the user wants me to translate "zero-sugar" into Thai. Let me check the rules again. The first rule says to translate all content into Thai. The second rule states if it's already in Thai, leave it as is. The third rule is to provide only the translation without explanations.
So, "zero-sugar" is in English. I need to translate it. The direct translation would be "น้ำตาลศูนย์" because "zero" is "ศูนย์" and "sugar" is "น้ำตาล". But wait, sometimes in Thai, product terms might use different phrasing. Let me confirm if "น้ำตาลศูนย์" is the standard term. Maybe "ปราศจากน้ำตาล" is another way, meaning "no sugar". However, "zero-sugar" is a specific term used in marketing, so "น้ำตาลศูนย์" seems more accurate. I'll go with that. Make sure there's no explanation, just the translation.