What component of the blood carries nutrients?

[wasteofo2]

Does a specific part of your blood carry nutrients to your body (like red blood cells carry o2), or are they just floating around free in the plasma?

[iansmith]

For iron, transferrin is reponsible for transport. http://sickle.bwh.harvard.edu/iron_transport.html

Here a short list for protein transporter
http://www.4adi.com/flr/svctflr.html