After removing red blood cells and clotting factors, they analyzed the remaining serum to assess each patient's metabolome — the body's unique chemistry, which results from everyday cellular processes and is made up of hormones and by - products of chemical reactions. (scientificamerican.com)
Meanwhile, as water freezes out of the mix, the remaining serum becomes a more concentrated solution of sugar and protein, with globules of fat — so its freezing point keeps dropping. (discovermagazine.com)
I left it on for the recommended time of 15 minutes and removed it, then massaged in the remaining serum on my face. (garnierusa.com)