Short answer: Some ingredients, including Apple Cider Vinegar, Apple Pectin and BHB, may affect blood sugar. If you have diabetes or take blood-sugar medication or insulin, that could push your blood sugar too low.
Why three specific ingredients are named, not a vague general caution
Naming ACV, Apple Pectin and BHB directly gives you something concrete to discuss with your doctor, rather than a generic "consult your doctor" disclaimer.
Why this caution is placed prominently under its own heading
This guidance appears under "Read This Before You Start" — placed before the ingredient breakdown, signaling its genuine importance.
⚠️ Worth knowing: so your medication and levels can be monitored safely — medical guidance matters specifically for this reason.