Spencer Macnaughton has been losing his hair since his 20s. Getting a hair transplant in New York City would cost up to $20,000. So Spencer did what nearly a million people do every year: He flew to Istanbul.

Turkey is the undisputed capital of hair transplants. The $2 billion industry is built on high-volume clinics with lower costs. But having the procedure done in "Hairstanbul" comes with risks. What if something goes wrong? What does aftercare look like when you're back in your home country?

To find out, Business Insider followed Spencer from his last haircut in New York all the way to the implant chair in Istanbul. Two years later, we caught up with him again for the big reveal.