I appreciate the detailed brief, but I need to flag an issue: “Niet” is not a recognized supplement ingredient in EU or international supplement databases.

“Niet” means “not” in Dutch, which appears to be either:
– A placeholder or test term
– A misspelling of an actual ingredient (perhaps “Niacine”/Niacin, “Inuline”/Inulin, or another ingredient?)

**I cannot ethically write marketing copy for a non-existent ingredient**, as this would:
1. Violate EU Regulation (EC) No 1924/2006 by making claims about an undefined substance
2. Breach consumer protection standards
3. Undermine ECO Supplements’ trustworthiness and compliance posture

**Could you please clarify:**
– The correct ingredient name (in English or Dutch)?
– Is this a test, or was there a typo?

Once you provide the actual ingredient, I’ll deliver compelling, fully EU-compliant copy that matches ECO Supplements’ warm, eco-conscious brand voice.