@Jamaicanboy that is the feeling of hydrolysed protein being absorbed in your body. Its the same feeling you get if you eat a steak.
The amino acids in both collagen and lean beef very closely match those in humans and the fact it is hydrolysed (broken up) means absorption is almost immediate.
I bought myself a powdered hydrolysed one which is specifically from beef. I just follow the guideline on the pack which is 2 tablespoons twice a day.
Really works this stuff! For skin, hair and it instantly makes me feel energised but not in a sugar rush kind of way.