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 typical sausage and cheese breakfast biscuit is about 6 oz of food, according to nutrition statistics released by McDonald's. Standard ingredients include a biscuit, cheese, sausage patty and scrambled egg. One sausage and cheese breakfast biscuit contains 510 calories, over one-quarter of the USDA daily allowance. Of those calories, 330 come from fat.