EXHIBIT 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in this Registration Statement on Form S-3 of our report dated October 27, 2005 relating to the financial statements and financial statement schedule of Lipid Sciences, Inc., appearing in the Current Report on Form 8-K dated October 27, 2005 and to the reference to us under the heading “Experts” in the Prospectus, which is part of this Registration Statement.

/s/ DELOITTE & TOUCHE LLP

San Francisco, California

October 27, 2005