The viral concept seems simple and effective. Here’s what experts really think about it.

Spend five minutes on FitTok (the fitness side of TikTok), and you’ll see dozens of different diets, workouts and supplements claiming to help you get fit and be healthier. Millions of accounts credit programs like 75 Hard or intermittent fasting for transforming their health, but these can be unsustainable and taxing on your body and brain.

Enter the “30-30-30 rule,” one of the internet’s latest obsessions. This now-viral wellness plan is brilliant in both its simplicity and its adaptability, but will it actually make you healthier? We spoke with experts to find out.