C3G side effects
Across 65 first-hand reports, people mentioned a side effect 6 times (about 9 per 100 reports). The most common: dark stool, dark stools, increased appetite. User reports show what people notice — they can't tell you whether C3G is safe for you.
Reported side effects
dark stool1
dark stools1
increased appetite1
anxiety1
poor sleep1
potentiates stimulation1
In their own words
“I've noticed dropping c3g has helped basically rid the feeling of not having a restful sleep.”
“I haven't noticed any workout/muscle benefits from any supplement. ... Stuff I've tried: - Creatine (total non-responder) - C3G”
“I'd wager the C3G, especially since you're on an SSRI.”
“I’ve tried C3G and it didn’t do anything”
Is C3G safe? What the research covers
BResearch: Moderate6 meta-analyses · 5 randomized trials on PubMed
None of the top reviews we found focus on safety. All research on C3G.