ALCAR side effects
Across 1,190 first-hand reports, people mentioned a side effect 68 times (about 6 per 100 reports). The most common: anxiety, insomnia, irritability. User reports show what people notice — they can't tell you whether ALCAR is safe for you.
Reported side effects
anxiety25
insomnia16
irritability12
stomach issues6
jitteriness4
anger2
drowsiness2
tingling1
What got worse for some people
In their own words
“I took Acetyl L-Carnatine twice a day for a couple of weeks. It made me fell depressed and sad. First day I stopped the L-Canatine the blues evaporated.”
“I took it for a week and felt nothing but that was after I started NALT.”
“I can easily sit for 12+ straight and focus. I thought Pterostilbene was insane but this is another beast completely.”
“I've personally experienced heightened anxiety as well as insomnia (though the insomnia is fairly easily remedied by making sure you take the pill in the morning).”
“I eventually increased the Noopept NALT ALCAR dose to 2 capsules 3x daily for a week before running out and nothing.”
“ALCAR has always worked wonders for me but I also have to cycle that on occasions where things get stressful, and it becomes a tad anxiogenic.”
Is ALCAR safe? What the research covers
AResearch: Strong46 meta-analyses · 86 randomized trials on PubMed
None of the top reviews we found focus on safety. All research on ALCAR.