This guy, 41 years old, grew  9cm in 3 weeks.

https://news.sky.com/story/japanese-astronaut-worried-after-growing-9cm-in-space-11201292

There you go peeps, your dream journey, not only you get to visit outer space, you also get to grow a few inches with no pain in a short period of time. And it's only "a bit" more expensive than LL!