Also: fish oil. Periodically you want to bite down on a fish oil pill and see if it tastes normal or rancid. Rancid fish oil does basically the exact opposite of what you're taking fish oil to do. pubmed.ncbi.nlm.nih.gov/37712532/ Fun fact: most fish oil is rancid
A Multi-Year Rancidity Analysis of 72 Marine and Microalgal Oil Omega-3 Supplements.
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Sep 2023 – Sep 2025Where it's discussed
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X / Twitter38 posts
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News30 articles
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Reddit3 posts
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YouTube2 videos
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Bluesky1 posts
AI synopsis
What people are saying
The social discussions revolve around the alarming results of the multi-year analysis showing nearly half of omega-3 supplements are rancid, with posts emphasizing that
Most discussions acknowledge the findings of the study, with users emphasizing the prevalence of rancid omega-3 supplements and supporting the importance of monitoring supplement quality.
The posts show high interest, as many users highlight concerns about supplement safety and cite detailed data from the study, indicating active engagement with the topic.
Several discussions reference research methodology, specific statistics (like nearly 45% of supplements being rancid), and include references to scientific publications, demonstrating deep engagement.
The conversations suggest moderate impact, with some posts advocating for consumer awareness and industry scrutiny, though widespread behavior change is implied but not explicitly shown.
Abstract in brief
- There is a significant variation in the freshness of consumer marine- and plant-derived omega-3 supplements, with concerns about rancidity and oxidation frequently debated in existing literature.
- A study assessed 72 omega-3 supplements sold in the U.S. from 2014 to 2020, measuring key indicators of freshness, and found that a large percentage of flavored and unflavored products exceeded established oxidation limits.
- The research also emphasizes the impact of flavoring on the oxidative status of these supplements, highlighting potential health implications for consumers.
Top posts
Most liked on X and BlueskyA Multi-Year #Rancidity Analysis of 72 Marine & Microalgal Oil Omega-3 #Supplements @_atanas_ @_INPST @ScienceCommuni2 @DHPSP @BowTiedVitamins @ChrisMasterjohn @HeidiHmoretti @hormonedietdoc https://t.co/1pShCZmPO6
A new study conducted over six years on 72 of the most popular brands of #omega3 #supplements found almost #HALF (45%) of flavored and unflavored supplements were #rancid. https://t.co/R2Wo98GaEt
Thank you to @JDietSupplement for publishing our nearly 10 year study on rancidity and #omega3 supplements (US) with added flavoring. Special thank you to co-authors @PhD_Leigh, Tod Cooperman, MD and Mark Anderson, PhD (@ConsumerLab) — summary below https://t.co/86aGFympD2
@DragonBowtied Excellent nuance (per usual). Thinking on this exactly your final point: longevity guru is pitching a fish oil supplement. At times, ANY supplement. When in reality the market is full of highly oxidized, rancid trash. More trash than pure unfortunately. https://t.co/AdGxQbOiYy
Worried about omega-3 supplementation? Listen to this #podcast and read our review on the science behind omega-3 supplements & why studies are conflicting or null: https://t.co/Ci0acDC42d Also, our study on rancidity in omega-3 supplements: https://t.co/2hxDWuxbp5 @jacobmhands https://t.co/Y7d3qtNZFG
All mentions
Assessing the Risks and Benefits of Omega-3 Fatty Acids for Heart Health
Dr Gillett and Nurse Practitioner James OHara discuss potential risks associated with omega-3s, including findings from recent studies on their impact on atrial fibrillation and blood viscosity, providing a…
Evaluating Fish Oil: Oxidation, Contamination, and Health Benefits
What about fish oil? Is it a problem due to oxidation and contamination? Jacob Hands and his team at Consumer Labs examine the health claims surrounding fish oils, alongside discussing their oxidative toxicity and…
RT @jacobmhands: @paulsaladinomd Hey @paulsaladinomd we publish on this subject routinely with our lab @PhD_Leigh you should check out any…
@paulsaladinomd Hey @paulsaladinomd we publish on this subject routinely with our lab @PhD_Leigh you should check out any of our papers published in partnership with https://t.co/StLy7HmpNT you’re wrong @Madam_Mito https://t.co/J6pdzwQ7hl
@incelantithesis @TakeThiamine If you didn't use chatGPT for your response and did your own research then you'd have stumbled across this study https://t.co/p8UgN04vLH
5%、不整脈の一種である心房細動のリスクを13%高めることと関連すると報告した論文もある。上記↑ 3. 酸化・品質の問題 魚油は非常に酸化しやすい脂肪酸であり、市販サプリの多くが 製造段階や流通中に劣化している。 https://t.co/ya6b9uktFP
@DragonBowtied Excellent nuance (per usual). Thinking on this exactly your final point: longevity guru is pitching a fish oil supplement. At times, ANY supplement. When in reality the market is full of highly oxidized, rancid trash. More trash than pure unfortunately. https://t.co/AdGxQbOiYy
@Khatayi17 The likelihood of you getting a rancid one in the market is much greater than a pure one. https://t.co/AdGxQbOiYy
@SamaHoole https://t.co/l6IOffdwSJ
Also: fish oil. Periodically you want to bite down on a fish oil pill and see if it tastes normal or rancid. Rancid fish oil does basically the exact opposite of what you're taking fish oil to do. pubmed.ncbi.nlm.nih.gov/37712532/ Fun fact: most fish oil is rancid
RT @PhD_Leigh: Worried about omega-3 supplementation? Listen to this #podcast and read our review on the science behind omega-3 supplements…
RT @PhD_Leigh: Worried about omega-3 supplementation? Listen to this #podcast and read our review on the science behind omega-3 supplements…
RT @PhD_Leigh: Worried about omega-3 supplementation? Listen to this #podcast and read our review on the science behind omega-3 supplements…
RT @PhD_Leigh: Worried about omega-3 supplementation? Listen to this #podcast and read our review on the science behind omega-3 supplements…
Worried about omega-3 supplementation? Listen to this #podcast and read our review on the science behind omega-3 supplements & why studies are conflicting or null: https://t.co/Ci0acDC42d Also, our study on rancidity in omega-3 supplements: https://t.co/2hxDWuxbp5 @jacobmhands https://t.co/Y7d3qtNZFG
Couple other things, as our lab @PhD_Leigh, have explored many times, fish oil is not created equal and therefore the effect of consumption is going to be inconsistent and marred by low quality supplements https://t.co/J6pdzwQF6T
@aahonarmand البته فراموش نشه تقریبا اغلب (نزدیک 50%) مکمل های روغن ماهی در بازار فاسد شده اند. https://t.co/l2ZYx6bVjb
@lynlynyl @celestialbe1ng @AnooshVafaei wow two seconds of googling is really hard https://t.co/iBT0LOHPvU https://t.co/C3Bv4Y0AWw https://t.co/o4C9IQmJTs basically it’s a coin flip at best that you don’t get a rancid supply and negative on that coin flip is way worse than the theorised positives on it
@MindfulKingdom https://t.co/2aT6XZaWov
@soonergise @TuckerGoodrich Been researching oxidation and omega3 for many years brother! Check out @ConsumerLab @foundmyfitness or better yet read our paper if you’d like to read my work here https://t.co/J6pdzwQF6T how’s your pubmed?
@nicknorwitz @exfatloss @foundmyfitness @realDaveFeldman I'm going to be interviewing @jacobmhands, the first author of this paper soon: "Overall, the oxidative state of the consumer Ω3 products tested is not, at this time, a demonstrated hazard."* "A Multi-Year Rancidity Analysis of 72 Marine and Microalgal Oil Omega-3 Supplements"
RT @lchfRD: A new study conducted over six years on 72 of the most popular brands of #omega3 #supplements found almost #HALF (45%) of flavo…
米国ジョージ・ワシントン大学の研究者らは、2014-2020年に米国で販売される魚介類及び藻類由来オメガ3脂肪酸含有サプリメント製品72点の分析を行い、多くの製品において油脂の酸化(過酸化物価、アニシジン価、TOTOX)が見られることを報告しています。#オメガ3脂肪酸 #酸化 https://t.co/5vTCtJuUib
RT @lchfRD: A new study conducted over six years on 72 of the most popular brands of #omega3 #supplements found almost #HALF (45%) of flavo…
https://t.co/1baEDIfoJr’s research findings regarding the freshness of oil in omega-3 supplements are the basis for an analysis published in the Journal of Dietary Supplements in September 2023. Read now: https://t.co/LqDpZv6fO5
RT @lchfRD: A new study conducted over six years on 72 of the most popular brands of #omega3 #supplements found almost #HALF (45%) of flavo…
RT @keisuke4713: 72種類の海洋・微細藻類油ω3サプリ 複数年の腐敗度分析https://t.co/t20ekulHdA 消費者向けフレーバー付きΩ3サプリ68%23/34と無フレーバー13%5/38がEPA・DHA世界機構基準上限値超え フレーバーサプリ65%…
RT @keisuke4713: 72種類の海洋・微細藻類油ω3サプリ 複数年の腐敗度分析https://t.co/t20ekulHdA 消費者向けフレーバー付きΩ3サプリ68%23/34と無フレーバー13%5/38がEPA・DHA世界機構基準上限値超え フレーバーサプリ65%…
Um novo estudo realizado ao longo de 6 anos em 72 das marcas mais populares de suplementos de #omega3 mostrou quase metade (45 %) dos suplementos com e sem sabor estavam rançosos. https://t.co/MxUXL3tgMf
RT @keisuke4713: 72種類の海洋・微細藻類油ω3サプリ 複数年の腐敗度分析https://t.co/t20ekulHdA 消費者向けフレーバー付きΩ3サプリ68%23/34と無フレーバー13%5/38がEPA・DHA世界機構基準上限値超え フレーバーサプリ65%…
72種類の海洋・微細藻類油ω3サプリ 複数年の腐敗度分析https://t.co/t20ekulHdA 消費者向けフレーバー付きΩ3サプリ68%23/34と無フレーバー13%5/38がEPA・DHA世界機構基準上限値超え フレーバーサプリ65%22/34と無フレーバーサプリ32%12/38が上限満たさず、フレーバーサプリ62%21/34が上限値越え https://t.co/sxi1q52TUW
A new study conducted over six years on 72 of the most popular brands of #omega3 #supplements found almost #HALF (45%) of flavored and unflavored supplements were #rancid. https://t.co/R2Wo98GaEt
RT @GWIntegrative: What we're reading from @PhD_Leigh Frame, who co-authored the article published in @JDietSupplement: "A Multi-Year Ranci…
What we're reading from @PhD_Leigh Frame, who co-authored the article published in @JDietSupplement: "A Multi-Year Rancidity Analysis of 72 Marine and Microalgal Oil Omega-3 Supplements." https://t.co/EOQMIqnAri #nutrition #supplements #MedEd https://t.co/JjFBAqVBXr
RT @HealthyFellow: A Multi-Year #Rancidity Analysis of 72 Marine & Microalgal Oil Omega-3 #Supplements @_atanas_ @_INPST @ScienceCommu…
RT @HealthyFellow: A Multi-Year #Rancidity Analysis of 72 Marine & Microalgal Oil Omega-3 #Supplements @_atanas_ @_INPST @ScienceCommu…
RT @HealthyFellow: A Multi-Year #Rancidity Analysis of 72 Marine & Microalgal Oil Omega-3 #Supplements @_atanas_ @_INPST @ScienceCommu…
A Multi-Year #Rancidity Analysis of 72 Marine & Microalgal Oil Omega-3 #Supplements @_atanas_ @_INPST @ScienceCommuni2 @DHPSP @BowTiedVitamins @ChrisMasterjohn @HeidiHmoretti @hormonedietdoc https://t.co/1pShCZmPO6
New study: A Multi-Year Rancidity Analysis of 72 Marine and Microalgal Oil Omega-3 Supplements. J Diet Suppl. 2023 Sep 15;1-12. https://t.co/esifgwZi7b
RT @jacobmhands: Thank you to @JDietSupplement for publishing our nearly 10 year study on rancidity and #omega3 supplements (US) with added…
Thank you to @JDietSupplement for publishing our nearly 10 year study on rancidity and #omega3 supplements (US) with added flavoring. Special thank you to co-authors @PhD_Leigh, Tod Cooperman, MD and Mark Anderson, PhD (@ConsumerLab) — summary below https://t.co/86aGFympD2