"I tried GUI's collagen because I just couldn't take the pain on my joints anymore. Soon, I noticed that I didn't have the creaky joints I would get after sitting for a period of time. The days I was grabbing pain reliever are finally gone. I'm truly grateful for this as I couldn't help but cry some nights due to the pain."

"This supplement is honestly a blessing in disguise. I have always had problems with my hair breaking off easily and other supplements I've taken do not work at all. Since I started taking GUI around a month ago, my hair isn't breaking off as easily as it was before. Not to also mention that it has tightened up my skin as well. So glad I found this and gave it a shot!"

"I've been taking GUI's 5-in-1 NAD+ for about two months now. Since I've started I have felt amazing... been extremely sleep-improved, energized, happier and can visibly see a change in my my overall mood and sleep quality has improved so much for the better.

"I have definitely noticed my gut feel more super empty than ever. The 1-Week Cleanse has literally flushed all of the waste out of me so fast and easy and effective I honestly couldn't believe it. I have honestly been very surprised and impressed, especially since I'm pretty skeptical of health supplements. I will be continuing to take this cleanse for my gut health daily now."