# Medical guidance on weight loss and body composition > Live situation record from CLSTR: https://clstr.news/situations/medical-guidance-on-weight-loss-and-body-composition > Updated: 2026-10-14T03:40:04.000Z. Sources: 11. Developments: 2. Medical professionals have issued guidance regarding the clinical significance and management of weight loss. Initially, experts warned that unintentional weight loss can serve as a major health indicator. Dr. João Marques Santos noted that losing 5% of body weight within six months without dietary or activity changes is clinically relevant, particularly for individuals over 60, where it may signal serious conditions like neoplasia. Subsequent guidance shifted focus toward the quality of weight loss, emphasizing the preservation of muscle mass to maintain metabolic health. Clinical nutritionist Elisa Blázquez and endocrinologist Dr. Pilar García Durruti highlighted the importance of monitoring body composition rather than just scale weight. Recommended strategies to prevent the loss of lean mass include adequate protein intake, strength training, avoiding excessively rapid weight loss, and maintaining professional medical supervision. ## Timeline ### 2026-10-14: Menopause health and weight management trends Health experts highlight the importance of managing menopause symptoms and bone health, while emphasizing muscle preservation during weight loss through protein intake and strength training. 9 sources. https://clstr.news/cluster/health-experts-emphasize-muscle-preservation-during-weight-loss ### 2026-09-19: Medical experts warn of risks regarding unintentional weight loss Medical experts advise that losing 5% of body weight within six months without dieting or exercise warrants immediate medical investigation, especially in individuals over 60. 2 sources. https://clstr.news/cluster/medical-experts-warn-of-risks-regarding-unintentional-weight-loss --- Cite as: Medical guidance on weight loss and body composition. CLSTR, https://clstr.news/situations/medical-guidance-on-weight-loss-and-body-composition