How does our blood absorb light?

Backed by Dan Oren, MD, Connecticut, Barry Hill, Steve Hayes, Drew Nuland, Jack Belkin, Ed Farber & Pam Nadell, Lisa Schreier, Howard I. Gralla, Sarah Nuland, and 40 other backersJudy Cooper, Guy Blackwell, David Franklin, Holly Giesen, Denny Luan, Arie Lavy, And1, Lena Fried, Michael Nevins, Carol Rickard, Jeff Humphrey, Deborah Fried, Sandra Gee, Robert Ruxin, Jessica Daniels, Carla Hellekson, Sandra L. Jones, Rob Comerford, Sarah, James Fadden, Adam Strohl, Donna Lomp, Katherine Sharkey, Stephanie Piecewicz, Mat M, John Gottlieb, Nick Pascarella, Neal Owens, Mark A. Searles, Dorothy -, Dustin Chang, Timothy D Bechtel And Nico Goldscheider, Harwell F Smith,PhD, Heidi Moretti, MS, RD, K. S., Amalyah Oren, Wooj Park, Ryan Lower, Karen, and 11