While Mark was in the kitchen, he grabbed another vial from the box. He saw that, according to the key in the box, this was an age potion, designed to make the drinker grow older.
Mark decided to slip some into Andrew's food. But how much? He didn't know the dosage amounts, he might accidentally make Andrew older than himself!
He decided to try a small amount and mixed it in well with the food so Andrew wouldn't realize it was there.
Mark brought out the food. "Here you go, Andrew. Eat up," he said.
Andrew greedily dug in. As he sat back after devouring his food, the usual muscle growth set in, making him absolutely massive. But something else began to change.
Andrew grew almost a foot taller, and his face began to mature. His Adam's apple grew and stubble appeared on his face and chest. When all was said and done, he appeared to be about 17 years old, a more appropriate age to match his muscles.