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:
There are 530 calories in 1 sandwich of McDonald's Sausage Biscuit with Egg, Classic Regular. You'd need to walk 139 minutes to burn 530 calories. Visit CalorieKing to see calorie count and nutrient data for all portion sizes.