Tighten the skin during weight loss

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Hi Everybody,

I just started the 30 day shred, and i'm concerned about having a bunch of loose skin as i lose weight. I have 3 months until my 30th birthday and also a vegas trip with the guys. i don't want to be at the pool looking like a half full pillow case. any tips or suggestions? currently 269lbs and looking to be at 240 by my bday.