Question on Peanuts

Hi All,

In most of the recipes that I see online, they ask to remove the skin of peanuts before use. In my home, my mom also removes the skin of the roasted peanuts.

But, after I started cooking, I heard from some one that it is the skin that carries all the nutrients of the peanuts and hence should be used as is with the skin and I started to use the peanuts with the skin. Is this really true?

Also, apart from weight gain, are there are any other issues of eating peanuts?