When student and YouTuber Jamie Raines started taking testosterone for his transition to male at age 18, he decided to document the process in a series of photographs.

Now 21, Raines' three-year project is prominently featured in a documentary on England's Channel 4 called "Girls to Men" about 3 British mens' experiences in transitioning.

"I didn’t really see myself," Raines told BuzzFeed News. "I got my hair cut really short and that made things a bit better but it was a very awkward time. I didn’t like looking in the mirror, but then as soon as I started testosterone it was about looking for those changes and then every time you noticed something it was exciting. And it’s the complete opposite now, I’m very happy with what I see in the mirror and very grateful for how I look now."

Among the things Raines noticed during his transition were an an elongation of his face, a deepening of his voice and new facial hair, which is representative of testosterone therapy. Raines has been enjoying documenting himself so much that he plans on continuing the project, telling BuzzFeed, "Now I feel like I’ve been doing it for so long I just want to keep going, for maybe five years. I’m really happy I’ve done it."

Watch the video below.