Hepatic portal circulation.
I would expect to find both amino acids and glucose in hepatic portal circulation. This is because both of these nutrients would not yet have been absorbed by the small intestine and they are vital for body function. I would not expect to find many lipids in hepatic portal circulation because they would have already been absorbed into lacteals. After nutrients have been absorbed into the hepatic portal, they enter the liver, where some glucose is stored as glycogen, before the nutrient rich blood is sent to the heart to be circulated around the body. This allows for cells to receive nutrients through the bloodstream.