Why experts say weight loss without guidance can cost you muscle

Losing weight without proper guidance can do more than shrink the scale — it can quietly erode muscle mass, leaving a person weaker over time. That's the message from Dr. John Paul Pareja, who argues that the real goal of any weight-loss effort should be reducing body fat while holding onto lean tissue.

The hidden cost of unsupervised dieting

Dr. Pareja points out that when people slash calories or follow trendy plans without professional input, they often lose a mix of fat and muscle. Because muscle drives strength, balance, and metabolic rate, losing it can leave dieters feeling fatigued, looking "softer," and even regaining weight once normal eating resumes.

Why preserving muscle matters

Keeping muscle is not just about appearance. It plays a central role in mobility, blood-sugar control, and injury prevention as people age. For readers looking to avoid the summer slump, simple strategies to help prevent summer belly fat gain can support fat loss without sacrificing strength.

• Aim for steady, moderate calorie deficits rather than extreme restriction.
• Include resistance training two to three times a week to signal the body to hold onto muscle.
• Eat enough protein at each meal to support tissue repair and satiety.
• Seek professional advice before starting any new diet or exercise plan.

A broader caution on quick fixes

Dr. Pareja's warning echoes growing concern about rapid weight-loss methods, including the rising use of injectable medications. Researchers have noted that weight-loss injections may trigger a new cycle of yo-yo dieting, and nutrition and lifestyle strategies for people using GLP-1 medications are increasingly recommended to protect lean mass during treatment.

Ultimately, the physician frames sustainable fat loss as a long-term investment in longevity — one where protecting muscle is just as important as shedding excess weight.