Ashton Kutcher has lost over 10 pounds since he started training for the TCS Marathon.

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Kutcher opened up about his body transformation weeks after he battled a rare autoimmune disorder.

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The biggest change physically has been the transfer of muscle mass.

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He says, I've lost about 12 pounds and my wife has been super supportive.

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His wife is running in the November marathon to raise money and awareness for Thorn.

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Thorn is an organization that aims to end child sexual exploitation.

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"My daily motivator is my kids and family", Kutcher shared.

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