"Yes, dad. As long as you take the Elixir of Life at regular intervals, you won't die." Hermione looked at her parents' stunned faces and felt it was completely understandable. Even You-Know-Who had pursued immortality, let alone her parents, who lived in the Muggle world and regarded eternal life as something out of myth. In fact, Hermione felt they were already showing the rationality and restraint dentists ought to have.
"Mr. Granger, actually, rather than calling it the Elixir of Life, it would be more accurate to call it the Elixir of Immortality. It has its own flaws. It only keeps the drinker from having to worry about dying of old age. Aging itself will be slowed, but it will still continue..." Allen said frankly, then immediately added, "But don't worry. We've already found a direction for solving that problem."
"Allen... even if we're only ordi... ordinary people, Muggles, as you call us, and we don't understand your wizarding world, we still know how precious a potion like this must be. Otherwise, there surely wouldn't be so few of you wizards..." Thinking of some of the things his daughter had once mentioned about the magical world, and then of those legends of immortality in myths, Mr. Granger instinctively wanted to refuse a gift so precious it was far beyond his ability to return. Would accepting it have some bad effect on his daughter, who now seemed destined to live in the magical world? But as he spoke, he suddenly realized that what he was refusing at this moment was the chance at eternal life, and his tone weakened. "We can't... can't..."
Before he could fully say the words of refusal, Allen interrupted him with sincere persuasion. "Mr. Granger, Mrs. Granger, you can accept this gift with peace of mind. Hermione