People in the middle of significant weight loss are one of the most heavily marketed-to groups in the health industry, and the promise is almost always the same: tighten the skin without surgery.
This topic is also in our free guide, Losing Weight Well. Get it emailed to you
This page sets out what each category can and cannot do, without naming products.
Topical creams and lotions
What they can do: improve skin hydration, texture and appearance. Skin that is well moisturised looks better than skin that is not.
What they cannot do: reduce surface area. No topical preparation penetrates to the level where collagen and elastin architecture would need to change, and skin excess is a structural problem, not a surface one.
Worth using for skin health. Not worth buying as a solution to loose skin.
Body wraps
What they do: compress tissue and remove fluid temporarily. Measurements taken immediately afterwards are smaller, which is the basis of most before-and-after demonstrations.
The effect resolves within hours as fluid returns. There is no mechanism by which a wrap changes skin structure.
Collagen and skin supplements
Ingested collagen is digested into amino acids like any other protein, and the body distributes them according to its own priorities. There is some evidence for modest effects on skin hydration and elasticity in ageing skin. There is no good evidence that supplementation reduces established skin excess after major weight loss.
If you take them and like the effect on skin quality, there is no harm in it. Adequate total protein matters considerably more.
Non-surgical tightening devices
Radiofrequency, ultrasound and similar technologies have a genuine mechanism — controlled heating of the dermis to stimulate collagen — and a genuine but limited effect on mild skin laxity.
The limit is the important part. These technologies are studied and marketed for mild laxity. Skin excess after major weight loss is a different order of problem, and a technology that produces a modest tightening effect on mildly lax skin will not resolve a fold.
If a practitioner tells you a device will address significant skin excess after major weight loss, ask what result is realistic in your specific case, ask how many sessions and at what total cost, and ask what happens if it does not work.
How to assess any claim
- Who took the photograph, and are they selling the product
- Is the before-and-after the same person, same position, same lighting, same time of day
- How long after the treatment was the after image taken
- What does it cost in total, not per session
- What is the stated result if it does not work
What does have evidence
Resistance training and adequate protein during the losing phase, sun protection, not smoking, and time. Those are covered on keeping muscle and on loose skin after weight loss.
And where skin excess is established, surgical removal is the only intervention that removes it. That is a statement of mechanism rather than a recommendation — whether it is worth it is an individual decision.