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Published on: 12/29/2025
Struggling to gain weight? Start by ruling out underlying medical causes with your clinician. Then, build a modest daily calorie surplus focused on protein (1.0–1.2 g/kg/day), healthy fats, small frequent meals, and resistance training to ensure added weight is mostly muscle rather than fat.
Evidence-based strategies include leucine-enriched whey protein with vitamin D, calorie-dense snacks and drinks, and weekly weight monitoring to target a healthy gain of 0.5–1 lb per week while supporting bone density and immunity. Red flag symptoms and personalized calorie needs should also be considered.
Because unintentional difficulty gaining weight can signal thyroid issues, malabsorption, diabetes, or other treatable conditions, it's worth understanding what's driving it before making major dietary changes. Take a free, instant, online symptom check to clarify possible causes and confidently plan your next steps.
Reviewed for medical accuracy: 07/09/2026
Life after 60: How can I gain weight quickly and safely?
As we age, many people over 60 struggle with unintentional weight loss. Maintaining a healthy weight helps preserve muscle mass, supports immune function and reduces risks of frailty, falls and fractures. If you're asking "how to gain weight" in a safe, effective way, here's a practical guide based on the latest clinical evidence and expert recommendations.
Key takeaways:
If you're ever unsure about changes in your weight or appetite, or if you experience alarming symptoms like severe fatigue, shortness of breath, chest pain or unexplained pain, please speak to a doctor immediately. A healthcare professional can help you develop a safe, effective plan tailored to your needs.
References
(References)
Bauer JM, Verlaan S, Bautmans I, Brandt K, Donini LM, Maggio M, McMurdo M, Mets T, Seal C, Sieber CC, Visvanathan R & Cederholm T. (2015). Effects of a vitamin D and leucine‐enriched whey protein nutr… Clinical Nutrition, 25444537.
D'Amico G, Garcia-Tsao G & Pagliaro L. (2006). Natural history and prognostic indicators of survival in cirrhosis… Journal of Hepatology, 17158053.
Volkert D, Beck AM, Cederholm T, Cruz-Jentoft AJ, Goisser S, Hooper L, Kiesswetter E, Maggio M & Sieber CC. (2019). ESPEN guideline on clinical nutrition and hydration in geriatrics. Clinical Nutrition, 31637886.
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