diff --git a/education/nutrition/Digestive System.md b/education/nutrition/Digestive System.md
index 64348c6..ef60b32 100644
--- a/education/nutrition/Digestive System.md	
+++ b/education/nutrition/Digestive System.md	
@@ -58,7 +58,10 @@ Chemical digestion refers to the breakdown of large molecules in food into small
 - Enzymes usually end in -ase and begin with the name of whatever they are working to digest:
 	- Amylase digests amylose
 	- Maltase digests maltose
-
+# Nutrient Absorption
+- **Simple Diffusion**: Occurs when the concentration of a particular nutrient is higher in one area than an other. This form of transport does not require energy input. Many water-soluble vitamins, lipids, and some minerals are absorbed in the digestive tract by simple diffusion.
+- **Facilitated Diffusion**: Enterocytes absorb some nutrients by facilitated diffusion, another process that does not require energy. Although the nutrient moves down its concentration gradient, it still needs to be carried by a special transport protein within the membrane of the enterocyte. Absorption of simple sugar fructose occurs by facilitated diffusion
+- **Active Transport**: Some nutrients move from the lumen of the intestine and into an enterocyte against the concentration gradient; that is, from low to high concentration. Absorption of these nutrients requires both a unique transport protein and energy. Enterocytes rely on active transport to absorb glucose and amino acids.
 
 # Definitions
 | Phrase                  | Definition                                                                                                                                                                                                                                                                                                                                       |