Extended Release Caffeine
People mainly take Extended Release Caffeine for energy, focus, sleep. Based on 4 first-hand reports and 0 meta-analyses & systematic reviews in the medical literature. Ranked #414 of 3,539 overall.
Of reports that state an outcome, 100% are positive.
What Extended Release Caffeine does, according to users
Of the people who reported each effect, the share who said it got better.
What the research says
Systematic reviews and meta-analyses from PubMed, with their published conclusions.
No randomized controlled trials in humans found on PubMed. The grade measures how much human research exists — read the conclusions below for what it found.
Dosage people report
As stated by users — not a recommendation. Follow the label or your doctor.
Reported side effects
How often each side effect came up across all reports.
What users say
First-hand experiences, quoted verbatim. We show one positive and one negative where both exist.
“Over the past month I've been taking 100 mg of extended-release caffeine 2-3x per day, and it has been a completely different experience. There is no crash at all”
“I pair 100mg extended release caffiene with 200mg l- theanine and it keeps me razor sharp and energized for 8+ hours with no crash”
“I've settled on just taking 1 or 2 of the extended release caffeine a day.”
Other options for energy
User data from public discussions; research from PubMed. Information only, not medical advice — talk to a doctor before starting, stopping or combining anything. Data updated October 3, 2026. How we rate