Fasting
People mainly take Fasting for focus, energy, hormones. Based on 98 first-hand reports. Ranked #230 of 1,974 overall.
40
User score
Mostly positive35% positive8% mixed2% negative55% unclear
Of reports that state an outcome, 78% are positive.
Clinical research
Research pending
What Fasting does, according to users
Of the people who reported each effect, the share who said it got better.
Focus100% of 13Energy100% of 12Hormones100% of 5Immunity100% of 4Digestion100% of 4Sleep75% of 4Recovery100% of 3Mood100% of 3
8 more with fewer than 3 reports
betterno changeworse
What the research says
Systematic reviews and meta-analyses from PubMed, with their published conclusions.
Research data for Fasting is being compiled.
Dosage people report
As stated by users — not a recommendation. Follow the label or your doctor.
24 hoursquarterly
3-5 days, 4x per yearas reported
72 hoursas reported
weekly 24h; 48-72h 4x/yearas reported
>3 days, monthlyas reported
most of the dayas reported
Reported side effects
How often each side effect came up across all reports.
anxiety ×1stomach issues ×1thyroid issues ×1teeth grinding ×1irritability ×1headache ×1sleepiness ×1
What users say
Verbatim quotes, shortened only — each links to the original discussion.
“Do quarterly fasting for 24 hours to help remove any cells that might be damaged”
“The biggest factor I have found is fasting”
“Fasting is amazing for recovery.”
“Fasting is ironically great for building mass... A >3 day fast will boost your natural HGH”
“eating better and fasting most of the day also quitting drinking helped a ton”
Other options for focus
Retatrutide
Peptide · 298 reports
100% report better focus
Mostly positiveBResearch: Moderate
Caffeine + L-Theanine
Supplement · 46 reports
91% report better focus
Mostly positive
Creatine Monohydrate
Supplement · 139 reports
94% report better focus
Mostly positiveAResearch: Strong
Semaglutide
Medication · 137 reports
67% report better focus
Mostly positiveAResearch: Strong
Intermittent Fasting
Lifestyle · 171 reports
94% report better focus
Mostly positive
Magnesium Glycinate
Supplement · 910 reports
70% report better focus
Mostly positiveCResearch: Limited
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 2, 2026. How we rate