Losing weight fast? Here’s how to tell if it’s muscle.

A free 3-page checklist — plus the 5-minute grip-strength test researchers use to catch it early, before the scale does.

• ✓ The 5-minute test that shows if you're losing strength, not just weight
• ✓ Why "successful" weight loss can quietly cost you muscle
• ✓ The 3 changes that protect the most muscle, starting with your next meal