This little bit of info came from a Q&A session via the official Tomb Raider twitter. Lara will have regenerative health on her island adventure, and while she can swim she won't be in this title.
Stewart also promises us "plenty of twists" in the story for poor shipwrecked Lara. Crystal will also be talking about "tons" of side stories and tasks this December.
Love it or hate it but health is going to regenerate, tweeted Stewart, so there's "no need for items." Tomb Raider is not due until spring next year but already the pre-order incentives and special editions are being rolled out. There's a Survivor and Collector's Edition offering various physical bribes.
Tomb Raider releases on Xbox 360, PS3 and PC March 5th, 2013.