When the pounds come off quickly—due to a GLP-1 medication or otherwise—your skin may lag behind. “For patients who are on GLP-1s, one of the primary concerns is increased laxity in the skin, or a loss of firmness and elasticity,” says Michelle Henry, M.D., a board-certified dermatologist in New York City. This can present as sagging skin around the jawline or neck, deeper lines and wrinkles, and hollowness in the cheeks and under-eye area.
These facial changes aren’t specific to GLP-1 medications. Rather, they’re a side effect of the weight loss itself—and the skin’s ability to adapt. Ahead, Dr. Henry answers why this happens, what you can realistically prevent, and how to care for your skin along the way.
Can Rapid Weight Loss Cause Loose or Sagging Skin?
“Skin laxity happens not only with age, but also with dramatic changes to the structure and foundation of our skin,” Dr. Henry says. That’s why it’s especially common with the use of GLP-1 medications, where significant weight loss often occurs over a short period of time.
As fat volume decreases, your once-firm skin may begin to look slack or deflated. These changes can happen anywhere on the body, but they’re often most noticeable in the face—particularly around the cheeks, jawline, and neck.
Timing varies, however it can happen sooner than many expect. “It depends on the patient—the older you are, the less resilient your skin is,” she says. “You usually start to see effects in three to six months.”
Why Does Skin Lose Elasticity During Weight Loss?
Skin tends to lose elasticity during weight loss because the structures that naturally keep it firm—collagen, elastin, and underlying fat—are already declining with age and can’t recover as quickly.
Starting in your late 20s and early 30s, collagen (a protein that gives skin strength and support) decreases by about 1% each year, and accelerates post-menopause. At the same time, elastin, a protein that allows skin to stretch and snap back, also diminishes.
As the weight comes off, the supportive fat layer directly beneath the skin compresses, but the skin itself doesn’t necessarily contract to match. “It’s like the table is shrinking, but the tablecloths stay the same size,” Dr. Henry says. “Not only are we losing structure under the skin, but the skin itself is getting weaker and thinner.”
It’s important to distinguish laxity from the wrinkles formed from repetitive facial movements over a lifetime. “Wrinkles are etched-in lines,” she explains, while laxity reflects “the downward shift, or the sagging of that tissue,” which is a deeper, structural change.
Can I Prevent Loose Skin During Weight Loss?
Loose skin isn’t completely avoidable, but you can decrease its likelihood and severity by slowing the rate of weight loss and taking a proactive approach to skin health.
Shedding weight gradually—about one to two pounds per week—may help to minimize the visible changes in skin firmness. “When patients come into the office, I usually encourage them to go on a program where they’re losing weight slowly,” Dr. Henry says. “We want them to lose that weight, but not in such a way that their skin can’t rebound.”
Remember that age plays a role as well. If skin is stretched far enough for long enough, it’s less likely to snap back to its original shape, which can make laxity more noticeable.
To prevent or lessen these effects, early intervention matters. Build a skincare routine with ingredients like retinol, hyaluronic acid, vitamin C, and SPF that help maintain collagen levels and overall skin integrity before and during your weight loss journey.
How Can I Support Skin Elasticity While Losing Weight?
Maintaining your skin’s resilience involves a whole-body approach that includes everything from proper nutrition to targeted products and treatments.
Protein
Prioritizing protein in your diet helps preserve muscle mass as you lose fat and shore up the body’s building blocks—amino acids—to synthesize new collagen. Foods rich in vitamin C and omega-3 fatty acids can also help bolster the skin’s structure and strengthen its moisture barrier.
Topical Skincare
Using products with ingredients that stimulate collagen and elastin like retinol, antioxidants, and peptides can help keep skin looking firm. Daily sunscreen (a broad-spectrum SPF 30 or higher) is non-negotiable, as UV exposure is one of the biggest drivers of collagen breakdown.
In-Office Treatments
If you’re looking for additional support, there are several in-office treatments designed to help lift and tighten skin after weight loss. “I like radiofrequency (RF) microneedling treatments and dermal fillers that stimulate collagen production,” Dr. Henry says.
Can Topical Skincare Help With Sagging Skin?
Yes, topical skincare can improve the appearance of sagging skin, especially when it’s used consistently and paired with healthy, gradual weight loss.
“If you’re going on a GLP-1, it’s a great time to build up your collagen in reserve and get your skin in its best functional state,” Dr. Henry says. She recommends products formulated to stimulate collagen and elastin production, “to give skin that snap-back so it’s more resilient and less likely to sag.”
Key ingredients to look for include retinol to improve firmness, peptides to boost collagen production, hyaluronic acid to hydrate and plump, antioxidants like vitamin C to help curb collagen breakdown, and ceramides to strengthen the skin barrier.
Products that combine several of these active ingredients can be especially helpful. For example, Dr. Henry notes that L’Oréal Paris RevitaLift Triple Power Anti-Aging Moisturizer includes pro-retinol, hyaluronic acid, and vitamin C to target firmness, hydration, and brightness in one step. In a consumer test of 100 GLP-1 users, three-fourths agreed their skin looked firmer after four weeks of use. A formula like this can visibly improve texture and resilience—making it a smart addition to your routine if you’re navigating weight loss and skin health.
