The collagen used in commercial products is not human collagen, it is usually cow or pig collagen, it is similar enough to have the same effect as human collagen but different enough that the body recognizes it as foreign. Anything the body recognizes as foreign has the potential to cause allergies.
There are 470 calories in a 1 biscuit serving of Hardee's Sausage & Egg Biscuit. Calorie breakdown: 57% fat, 30% carbs, 13% protein. Related Biscuits from Hardee's:
A sausage, egg and cheese biscuit contains about 575 calories. The bulk of those calories come from the biscuit, which is a high-fat bread. One 125-gram turkey and pork sausage patty, after it is fully cooked, contains 77 calories. One large egg has 72 calories. For an egg fried in butter, 1/2 tbsp. of butter contains 51 calories.