Sep 3, 2013 7:40am
Stretch marks are a skin condition, essentially scars. Dieting and exercise will have zero impact.
For white (old) stretch marks, nothing can be done. They will fade closer to your natural skin colour over time, but that's it.
You can help the reddish or pinkish (fresh) stretch marks, but results vary for each individual. Keep your skin supple. This means drinking sufficient water and helping to keep that water from evaporating by hydrating your skin topically. Not just the stretch marks, all of your skin. You can locally massage the affected areas with almond oil/butter. You can add some vitamin E to that (Jamieson has a concentrated liquid version that is easy to mix into creams and lotions; most drug stores would have it). Recently, some folks here were discussing coconut oil, and although I have no idea whether it works, it does have about the right properties, so it theoretically is a candidate. You have nothing to lose trying it, lots of people have been using it for skin conditions for some time.
Most importantly, prevent further stretch marks by keeping weight variations to a minimum. This also means don't try to lose forty pounds by Christmas. You might rebound and your skin will not like it. Skin is elastic, but it isn't rubber. It can only stretch so far.