The short answer. There isn't much data on Ultra Omega 3 yet — 7 mentions, 3 with a clear outcome — so treat these numbers as anecdotal. There is a moderate body of research — 11 meta-analyses and 0 trials.
From 7 mentions in total — the rest didn't say how it went and aren't counted.
Of the people who reported each effect, the share who said it got better.
Systematic reviews and meta-analyses from PubMed, with their published conclusions.
At least one meta-analysis, or 5+ randomized controlled trials. The grade measures how much human research exists — read the conclusions below for what it found.
Conclusion: Taken together, one promising aspect of omega-3 PUFAs is that there seem to be no reports of relevant deleterious side effects in humans, even at high doses. The differential effects on lipid parameters and bleeding time are noteworthy and need further clarification.
PubMed 24861004 ↗Conclusion: 6 months or less), it may achieve only a delay in psychosis onset. Due to the heterogeneity in the interventions considered, the current results do not allow recommendation for any specific treatment.
PubMed 20727717 ↗Conclusion: The effectiveness of omega-3 PUFA dietary supplementation is modulated by age, duration of untreated psychosis and illness, baseline levels of omega-3 fatty acids, and status of antioxidant capacity of patients. The important implications for psychiatric research and clinical practice developments as well as nursing care are presented and discussed.
PubMed 34281415 ↗Conclusion: Omega-3 fatty acid supplementation generally has no significant benefits for treating schizophrenia and ultra-high risk group. However, subgroup findings highlight the need for future trials focusing on early-stage patients, longer supplementation, and exploring synergistic effects with adjunctive antioxidant interventions. Clinical application should remain cautious until further confirmatory evidence emerges.
PubMed 41219779 ↗As stated by users — not a recommendation. Follow the label or your doctor.
How often each side effect came up across all reports.
First-hand experiences, quoted verbatim. We show one positive and one negative where both exist.
“I think the Ultra Omega 3 (if thats what you're referring to) is more cost-beneficial.”
“I've been using their NOW Ultra Omega 3's for approximately 4-5 years and never had a problem with any bottle”
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