I have NO idea if this works, but I can recall looking this up when people were talking about loose skin on another thread, and just filing it away.
It may just be advertising, for all I know:
"This is our general advice on tightening skin.
Look at
www.skinbiology.com/skintightening.html and
www.skinbio.com/beforeafterpicts.html
1. Many women and men have had good results in reducing loose skin or excess skin after weight loss. It is slow but usually works and several people have avoided recommended surgery to remove skin.
Some women said they got a mini-breast lift and decided not to have a surgical lift.
2. Start with Trireduction Cream in the morning and or LacSal Cream at night. (You can use either cream in the morning or evening, but this is the order most people use.) Let your skin adjust to this. Just rub the cream on the skin. If there is initial stinging, it will diminish with time but use less if it is a problem.
3. Later, get a stronger hydroxy acid like a 15% to 30% lactic acid or glycolic acid and use this in the evening.
4. After a time, some people use a hydroxy acid in the morning, a SRCP at noon, the hydroxy again about 6 pm, and an SRCP at night. Your skin may be on the edge of irritation so back off if irritation becomes too much.
5. You can later switch to stronger products such a 30% lactic acid or glycolic acid and Super Cop cream but be careful of irritation. For stronger hydroxy acids, see
www.skinbiology.com/resellers.html.
The process will take six months to a year but you should start seeing an improvement in about 2 months.
6. The same procedure will reduce scars.
7. You can use the products all over your body.
8. If your skin is dry, use either Emu Oil for Skin or Retinol in Squalane as a moisturizer.
9. Daily supplements of 1 gram of MSM, 1 gram borage oil, and 1 gram vitamin C also help.
10. Combining the above with exercise gives even better results."