Expert Q&A

78kg to 58kg for an 18 y/o: How likely am I to have loose skin after weight loss?

Your Age Is a Major Advantage

At 18 years old, your skin elasticity is near its peak. Collagen production remains high until the mid-20s, which significantly lowers your chances of noticeable loose skin after dropping from 78kg to 58kg. Most 18-year-olds who lose 20kg gradually see their skin retract well within 12-18 months. However, rapid loss, previous yo-yo dieting, and carrying extra weight around the midsection can still create mild sagging on the abdomen, arms, or inner thighs.

Factors That Determine Loose Skin Risk for You

The amount of weight lost matters less than the speed and your starting body composition. Losing 1kg per week or slower gives skin time to adapt. Your history of failed diets suggests possible insulin resistance and hormonal fluctuations that make fat loss trickier, especially around the belly. Joint pain and diabetes management add complexity—quick fixes often worsen outcomes. In my book The CFP Method, I emphasize tracking waist measurements alongside scale weight to ensure you're losing fat, not just water or muscle.

Genetics play a role, but at your age the bigger risks are dehydration, inadequate protein (aim for 1.6-2.0g per kg of goal weight, so roughly 95-115g daily), and zero strength training. Insurance rarely covers support programs, so focus on sustainable habits you can maintain without fancy gyms.

Practical Steps to Minimize Loose Skin

Build muscle while losing fat. Perform full-body resistance workouts 3 times weekly using bodyweight or resistance bands—squats, push-ups against a wall, and planks protect joints while stimulating collagen. Stay hydrated with 3-4 liters of water daily and include collagen-rich foods like bone broth or a 10g daily supplement.

Eat 500 calories below maintenance with high-protein meals that fit your schedule: eggs and oats for breakfast, turkey wraps for lunch, salmon and vegetables for dinner. Avoid extreme deficits that trigger metabolic slowdown common after repeated dieting. Walk 8,000 steps daily to aid circulation without aggravating joint pain.

Moisturize twice daily and consider dry brushing to support skin health. If mild looseness appears after reaching 58kg, continue building muscle for another 6 months—most young adults see 70-80% improvement naturally.

When to Seek Professional Help

If after 18 months you still have significant excess skin affecting confidence or mobility, consult a dermatologist. Non-surgical options like radiofrequency treatments can help. Remember, reaching 58kg will dramatically improve your blood pressure, diabetes markers, and energy levels. Focus on the process outlined in The CFP Method rather than perfection. Your youth gives you an excellent outlook for tight, toned results with smart habits.

💬 What the Community Says

Young adults aged 18-25 discussing 15-25kg weight loss journeys report loose skin is less common than feared when loss stays under 1kg weekly. Many in similar situations (joint pain, insulin resistance, past diet failures) share success stories from consistent strength training and high protein intake, noting arms and stomach improve most over 12 months. A vocal minority who lost faster than 1.5kg per week describe mild abdominal looseness that improved with muscle gain but not fully. Beginners often worry about embarrassment asking for help, but forum threads highlight relief once seeing gradual changes without expensive interventions. Hormonal factors and time constraints frequently come up, with most agreeing sustainable meal plans beat complex protocols. Overall sentiment leans optimistic for teens and early 20s, tempered by calls for patience over quick fixes.
Cite this answer
Clark, R. (2026). 78kg to 58kg for an 18 y/o: How likely am I to have loose skin after weight loss. *CFP Weight Loss*. https://ask.cfpweightloss.com/ask/78kg-to-58kg-for-an-18-y-o-how-likely-am-i-to-have-loose-skin-after-weight-loss
Russell Clark, FNP-C, APRN, FNP-C, APRN
About the Author

Russell Clark, FNP-C, APRN, is the founder of CFP Weight Loss in Nashville and CFP Fit Now telehealth. Over 35 years in healthcare — Army Nurse Reserves, Level 1 trauma ER, hospitalist — he developed a 30-week protocol integrating real foods, detox, and low-dose tirzepatide cycling that has helped hundreds of patients lose 30–90 pounds. He and his wife Anne-Marie lost a combined 275 pounds using the same protocol.

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