Natural supplements (Hoodia, chromium, chitosan, kelp, green tea) can modestly affect appetite or fat absorption, but evidence is limited. Sustainable weight control depends on creating a calorie deficit with selective eating, portion control, and regular activity. Consult a clinician before using supplements.
Losing 20 pounds is achievable with steady, sustainable changes: a moderate calorie deficit, strength training to preserve muscle, sleep and stress management, and ongoing habits to prevent regain. Medical therapies can help but should be used with clinical guidance.
Ab equipment can strengthen the core and improve posture, but visible belly change requires overall fat loss and consistent training. Choose tools that fit your routine and progress sensibly.