Which Omega-3s & DHA supplements contain the lowest levels of potentially harmful contaminants, including pesticides, heavy metals, PFAS “forever chemicals,” and phthalates? We asked our audience which Omega-3s & DHA supplements they were using, and then sent the top 6 products to different EPA-certified laboratories for contaminant testing. The results provide consumers with data-driven information to help evaluate and compare Omega-3s & DHA supplement brands based on contaminant levels. You’ve trusted Mamavation to bring you consumer studies like (1) safest cooking oils tested for phthalates, (2) safest water filters to filter PFAS, (3) safest Vitamin D supplements, and (4) safest women’s multivitamins; now join us for a consumer study testing Omega-3s & DHA for pesticides, PFAS “forever chemicals,” phthalates, & heavy metals.
Disclosure: This consumer study is released in partnership with Environmental Health News. Note that Mamavation has only “spot-checked” the industry and thus we cannot make predictions about brands and products that we have not tested. Products and manufacturing aides can change without notice so buyer beware. This post contains affiliate links, with most to Amazon, which means Mamavation will receive a portion of those sales and we will use that to pay ourselves back for the testing. You can also give a tax-deductible donation to our consumer studies here through Environmental Health Sciences. Thank you! Copyright © 2026 Mamavation — All Rights Reserved
Mamavation’s EPA-Certified Laboratory Finds Heavy Metals, PFAS, Pesticides, & Phthalates in Popular Omega-3s & DHA Supplements
Mamavation sent six popular omega-3s and DHA supplements to two EPA-certified laboratories testing for PFAS analytes, including PFOA/PFOS, phthalates, heavy metals, glyphosate, and 500+ additional pesticides. The contamination results were surprising considering how expensive most of these products were in terms of phthalate contamination. Here’s the outcome of contaminants that were found according to our labs:
100% of Omega-3s & DHA supplements contained ortho-phthalates. That’s 6 out of 6 products.
Total phthalate levels ranged from 117 ppb to 6,193 ppb.
No Omega-3s or DHA supplements had levels of heavy metals (lead, arsenic, cadmium & mercury) that would require a Prop. 65 warning in California. 6 products had lower levels of heavy metals. However, 1 product had zero detectable heavy metals.
None of the Omega-3s & DHA supplements we tested had detectable levels of glyphosate at the lowest standardized level.
None of the Omega-3s & DHA supplements we tested had detectable levels of 500+ other pesticides.
None of the Omega-3 and DHA supplements we tested contained any PFAS chemicals.
Contaminants Included in Mamavation’s EPA Certified Laboratory Testing
Mamavation sent six Omega-3 & DHA supplements to two different EPA-certified laboratories to test for specific problematic contaminants that would not be listed on an ingredient panel. These ingredients are never found on an ingredient label because they are not considered “intentionally added” and would instead be considered more of a contaminant from manufacturing, transportation, storage, and/or agricultural practices. However, just because these contaminants are not “intentionally added” doesn’t mean they won’t affect your health over time and with repeated use. With regular, long-term use, even low-level contaminants can matter for health. That’s why independent testing and transparent sourcing practices are important for both consumers and the companies they trust.
Our labs tested for the following contaminants and found some of them present in the Omega-3s & DHA we tested to varying degrees:
40 specific PFAS “forever” chemicals
Glyphosate
500+ additional Pesticides
Phthalates
Lead — heavy metal
Arsenic — metaloid
Cadmium — heavy metal
Mercury — heavy metal
PFAS “Forever Chemical” Analytes Tested, Including PFOA & PFOS
PFAS “forever chemicals” are per- and polyfluoroalkyl substances used as stain-resistant, water-resistant, & oil-resistant chemicals in commerce. They have been used for decades in consumer products, manufacturing, and building materials. Here are some of the health effects associated with different PFAS “forever chemicals:”
It’s also very clear based on biomonitoring evidence from the Center for Disease Control (CDC) that PFAS are in virtually all Americans. Therefore, these exposures can harm most Americans.
For this investigation, we elected to test for forty specific PFAS analytes listed below using EPA method 1633:
Perfluorobutanoic acid (PFBA)
Perfluoropentanoic acid (PFPeA)
Perfluorohexanoic acid (PFHxA)
Perfluoroheptanoic acid (PFHpA)
Perfluorooctanoic acid (PFOA)
Perfluorononanoic acid (PFNA)
Perfluorodecanoic acid (PFDA)
Perfluoroundecanoic acid (PFUnA)
Perfluorododecanoic acid (PFDoA)
Perfluorotridecanoic acid (PFTriA)
Perfluorotetradecanoic acid (PFTeA)
Perfluorobutanesulfonic acid (PFBS)
Perfluoropentanesulfonic acid (PFPeS)
Perfluorohexanesulfonic acid (PFHxS)
Perfluoroheptanesulfonic Acid (PFHpS)
Perfluorooctanesulfonic acid (PFOS)
Perfluorononanesulfonic acid (PFNS)
Perfluorodecanesulfonic acid (PFDS)
Perfluorododecanesulfonic acid (PFDoS)
Perfluorooctanesulfonamide (FOSA)
NMeFOSAA
NEtFOSAA
4:2 FTS
6:2 FTS
8:2 FTS
NEtFOSA
NMeFOSA
NMeFOSE
NEtFOSE
9Cl-PF3ONS
HFPO-DA (GenX)
11Cl-PF3OUdS
ADONA
3:3 FTCA
5:3 FTCA
7:3 FTCA
NFDHA
PFMBA
PFMPA
PFEESA
Glyphosate — Testing Details
Glyphosate [N-(phosphonomethyl) glycine] is the active ingredient in glyphosate-based herbicides (GBH) and is the most popular herbicide in the world. Its environmental presence increased sharply after the introduction of “Roundup Ready” crops in 1996, which allowed glyphosate to be sprayed onto crops such as soy, corn, and cotton without killing them. Beyond agriculture, glyphosate is extensively used in landscaping, roadside maintenance, golf courses, and vegetation control in fire-prone areas.
Glyphosate was originally patented as a chelator and an antibiotic, which means it binds minerals and interferes with microbial systems. These properties have fueled concern that long-term exposure may disrupt nutrient absorption, alter the gut microbiota, and increase antibiotic resistance.
The World Health Organization (WHO) has classified glyphosate as a probable carcinogen, and California lists it under Proposition 65 for cancer and reproductive harm.
Because glyphosate is not an intentionally added ingredient, it does not appear on supplement labels. However, its absence from ingredient panels does not guarantee absence from the product itself. Contamination can occur through agricultural practices, raw material sourcing, manufacturing, transportation, or storage—making independent testing a critical safeguard.
To evaluate potential exposure, Mamavation sent six Omega-3s & DHA supplements to an EPA-certified laboratory for testing. Samples were analyzed for glyphosate and AMPA using liquid chromatography–mass spectrometry (LC-MS/MS) with a detection limit of 10 parts per billion (ppb), which is the lowest level routinely achievable through standardized commercial testing. While some academic laboratories may reach lower limits, those methods are not widely available or standardized for consumer product screening.
500+ Additional Pesticide Laboratory Tests for Vitamin D Supplements — Testing Details
Six Omega-3 & DHA supplements were sent to our EPA-certified lab and analyzed using two different methods, totaling testing for 587 pesticides down to the lowest standardized level, mostly 10 ppb. However, there are a few chemicals for which the detection limit ranged from 18 to 25 ppb. The first method looked at the following pesticides:
2,4,6-Trichloroanisole
2,4,6-Trichlorophenol
2-phenylphenol (SP)
8-hydroxyquinoline (SP)
Acetochlor
Acrinathrin
Alachlor
Aldrin
Alpha Endosulfan
Alpha-HCH
Ametryn
Anthraquinone
Atrazine
Beflubutamid
Benalaxyl
Benfluralin
Beta Endosulfan
Beta-HCH
Bifenazate-Bifenazate Diazene
Bifenox
Bifenthrin
Biphenyl
Bitertanol
Bromophos-ethyl
Bromophos-methyl
Bromopropylate
Bupirimate
Captan
Captan (Sum)
Carbophenothion
Chinomethionat
Chlordane (Sum)
Chlorfenapyr
Chlorfenson
Chlorfenvinphos
Chlormephos
Chlorobenzilate+Chloro propylate
Chlorothalonil
Chlorotoluron
Chlorpropham
Chlorpyrifos
Chlorpyrifos-methyl
Chlorthal-dimethyl
Chlorthion
Cinidon-ethyl
Cis-Chlordane
Cyfluthrin
Cyproconazole
Cyprodinil
DDD-pp+DDT-0p
DDT (Sum)
DEET
delta-HCH
Deltamethrin
Desethyl atrazine
Diafenthiuron
Diazinon
Dichlobenil
Dichlofenthion
Diclobutrazol
Dicloran
Dicofol (Sum)
Dicofol 0,p
Dicofol p,p
Dicrotophos
Dieldrin
Dieldrin (Sum)
Dicofol o,p
Dicofol p,p
Dicrotophos
Dieldrin
Dieldrin (Sum)
Difenoconazole
Diflufenican
Dimefox
Dimoxystrobin
Diniconazole
Dinobuton
Diphenylamine
Disulfoton (SP)
Disulfoton (Sum)
Disulfoton Sulfone
Disulfoton Sulfoxide
Ditalimfos
Endosulfan (Sum)
Endosulfan-Sulphate
Endrin
EPN
Epsilon-HCH
EPTC
Ethalfuralin
Ethion
Ethofumesate (SP)
Ethoprophos
Etridiazole
Etrimfos
Fenarimol
Fenazaquin
Fenchlorphos (SP)
Fenchlorphos (Sum)
Fenchlorphos Oxon
Fenitrothion
Fenpropathrin
Fenson
Fenthion (SP)
Fenthion Oxon
Fenvalerate
Flucythrinate
Flumetralin
Fluopicolide
Fluopyram
Fluotrimazole
Flutamone
Fluvalinate
Folpet
Folpet (Sum)
Fonofos
Furalaxyl
Heptachlor (SP)
Heptachlor (Sum)
Heptachlor Epoxide A
Heptachlor Epoxide B
Heptenophos
Hexachlorobenzene
Hexaclorobutadiene
Hexacanazole
Iodofenphos
Iprobenfos
Iprodione
Iprovalicarb
Isazofos
Isofenphos
Isophenfos-methyl
Kresoxim-methyl
Lambda-Cyhalothrin
Lindane
Malaoxon
Malathion (SP)
Mefenpyr Diethyl
Mepronil
Metalaxyl-M (Mefenoxam)
Methacrifos
Methidathion
Methacrifos
Methidathion
Methoxychlor
Metribuzin
Mevinphos
Mirex
Molinate
Myclobutanil
Naled
Naled (Sum)
Napropamide
Nitrofen
Nitrothal Isopropyl
Nuarimol
o,p-DDD
o,p-DDE
Ofurace
Oxadixyl
Oxychlordan
Oxyfluorfen
p,p-DDT
p,p-DDE
Paraoxon Methyl
Paraoxon-ethyl
Parathion Methyl (SP)
Parathion Methyl (Sum)
Parathion-ethyl
Parathion-ethyl (Sum)
Penconazole
Pendimethalin
Pentachloroaniline
Pentachloroanisole
Pentachlorobenzene
Pentachlorobenzonitrile
Pentachlorophenol
Permethrin
Phenthoate
Phorate
Phosalone
Phthalimide
Piperonyl butoxide
Pirimiphos-ethyl
Pirimiphos-methyl
Procymidone
Profenofos
Profluralin
Prometryn
Propazine
Propetamphos
Propyzamide
Prothiofos
Pyrazophos
Pyridaben
Pyridaphenthion
Pyrifenox
Pyrimethanil
Pyriproxyfen
Quinalphos
Quintozene
Quintozene (Sum)
Silthiofam
Simazine
Tebuconazole
Tebufenpyrad
Tecnazene
Tefluthrin
Terbacil
Terbumeton
Terbuthylazine
Terbuthylazine Desethyl
Terbutryn
Tetrachlorvinphos
Tetracanazole
Tetradifon
Tetrahydrophthalimide (THPI)
Tetramethrin
Tetrasul
Thiometon
Tolclofos-methyl
Trans-Chlordane
Transfluthrin
Triadimefon
Triadimenol
Tri-allate
Triamiphos
Trifluralin
Uniconazole
Vinclozolin
Zeta-cypermethrin
The second group was analyzed using the LC-MS/MS technique for 360 pesticides and included the following:
3-OH carbofuran (SQ)
Abamectin
Acephate
Acequinocyl
Acetamiprid
Acibenzolar-S-methyl (SP)
Alcarb (SP)
Aldicarb (Sum)
Aldicarb Sulfone
Aldicarb Sulfoxide
Ametroctradin
Aminocarb
Amitraz (SP)
Atrizine Desisopropyl
Azaconazole
Azadirachtin
Azamethiphos
Azimsulfuron
Azinphos-ethyl
Azinphos-methyl
Azocyclotin and Cyhexatin (SQ)
Azoxystrobin
Ben-Carb-TPN (Sum)
Bendiocarb
Bentazone (SP)
Bentazones-methyl
Benthiavalicarb
Bioallethrin
Bixafen
Boscalid
Bromacil
Bromoxynil (SP)
Bromuconazole
BTS 44595
BTS 44596
Buprofezin
Butachlor
Butocarboxim
Butoxicarboxim Sulfoxide
Butralin
Buturon
Cadusafos
Carbaryl
Carbendazim and Benomyl
Carbetamide
Carboxin (SP)
Carfentazone-ethyl (SP)
Chloratraniliprole
chlorbromuron
Chlorfluazuron
Chloridazon
Chloroxuron
Chlorsulfuron
Chlorthiophos
Clethodim (SP)
Clethodim Sulfoxide
Clofentezine
Clomazone
Clopyralid
Clothianidine
Coumaphos
Crimidine
Cyanazine
Cyantraniliprole
Cyazofamid
Cyclanilide
Cycloate
Cycloxydim (SP)
Cyenopyrafen
Cyflufenamid
Cyflumetofen
Cyhalofop-butyl
Cymoxanil
Cyromazine
Demeton S
Demeton-S-methyl
Demeton-S-Methylsulfone
Demeton-S-sulfoxide
Desmedipham
Desmetryn
Dialifos
Dichiofluanid
Dichlormid
Dichloroprop
Dichlorvos
Diclofop (SP/SQ)
Diclofop (Sum)
Diclofo-methyl (SP/SQ)
Diethofencarb
Diflubenzuron
Dimefuron
Dimethachlor
Dimethenamid-P
Dimethoate
Dimethoate (Sum)
Dimethomorph
Dimethylaminosulfotoluidide (DMST)
Dinotefuran
Diuron
DNOC
Dodemorph
Dodine
Edifenphos
Emamectin B1a
Epoxiconazole
Ethaboxam
Ethiofencarb
Ethiofencarb sulfone
Ethiofencarb sulfoxide
Ethiprole
Ethirimol
Ethoxyquin (SQ)
Etofenprox
Etoxazole
Famoxadone
Fenamidone
Fenamiphos (SP)
Fenamiphos (Sum)
Fenamiphos Sulphone
Fenamiphos Sulphoxide
Febnuconazole
Fenbutatin oxide
Fenhexamid
Fenobucarb
Fenoxycarb
Fenpiclonil
Fenpropidin (SP)
Fenpropimorph
Fenpyrazamine
Fenpyroximate
Fensulfothion
Fensulfothion Oxon
Fensulfothion Oxon Sulfone
Fensulfothion Sulfone
Fenthion (Sum)
Fenthion Oxon Sulfone
Fenthion Oxon Sulfoxide
Fentin (SP/SQ)
Fenuron
Fipronil (SP)
Fipronil (Sum)
Fipronil Sulfide
Fipronil Sulfone
Flamprop
Flazasulfuron
Flonicamid (SP)
Flonicamid (Sum)
Florasulam
Fluazifop-methyl (SP)
Fluazifop-P (SP)
Fluazifop-P-butyl (SP)
Fluazinam
Flubendiamide
Fludioxonil
Flufenacet
Flufenacet (Sum)
Flufenacet ESA
Flufenacet OA
Flufenoxuron
Flumioxazin
Fluometuron
Fluoxastrobin
Flupyradifurone
Fluquinconazole
Fluoxypyr (SP)
Fluroxypyr-meptyl
Fluroxypyr-meptyl
Flusilazole
Flutolanil
Flutriafol
Fluxapyroxad
Foramsulfuron
Forchlorfenuron
Formetanate (SP)
Formothion
Fosthiazate
Fuberidazole
Halosulfuron methyl
Haloxyfop (Sum)
Haloxyfop-2-ethoxyethyl
Haloxyfop-methyl (SP)
Haloxyfop-R (SP)
Hexaflumuron
Hexazinone
Hexythiazox
Imazalil
Imazapic
Imazappic
Imazapyr
Imidacloprid
Indaziflam
Indoxacarb
Iodosulfuron-methyl (SP)
Ioxynil (SP)
Isocarbophos
Isoprocarb
Isoprothiolane
Isoproturon
Isopyrazam
Isoxaben
Isoxathion
Ivermectin
Lenacil
Linuron
Lufenuron
Mandipropamid
Matrine
MCPA (SP)
Mecarbam
Mepanipyrim
Meptyldinocap
Mesosulfuron-methyl
Mesotrione
Metaflumizone
Metamitron
Metazachlor (SP)
Methiocarb (Sum)
Methoprotyne
Methoxyfenozide
Metobromuron
Metolachlor and S-Metolachlor
Metolcarb
Metoxuron
Metrafenone
Metsulfuron-methyl
Milbemectin SQ (Sum)
Milbemycin A3 (SQ)
Milbemycin A4 (SQ)
Monocrotophos
Monolinuron
monuron
Neburon
Nicosulfuron
Nitenpyram
Norflurazon
Novaluron
Omethoate
Oxadiargyl
Oxydiazon
Oxamyl
Oxasulfuron
Oxathiapiprolin
Oxycarboxin
Paclobutrazol
Pencycuron
Penthiopyrad
Phenmedipham
Phorate (Sum)
Phorate Oxon
Phorate Oxon Sulfone
Phorate Oxon Sulfoxide
Phorate Sulfone
Phorate Sulfoxide
Phosmet (SP)
Phosmet (Sum)
Phosmet oxon
Phosphamidon
Phoxim
Picolinafen
Picoxystrobin
Pinoxaden
Pirimicarb
Pirimicarb Desmethyl
Pirimicarb Desmethyl Formamide
Prochloraz (SP)
Prochloraz (Sum)
Promecarb
Propachlor
Propamocarb (SP)
Propanil
Propaquizafob
Propargite
Propham
Propiconazole
Propoxur
Proquinazid
Prosulfocarb
Prosulfuron
Prothiocaonazole
Pydiflumetofen
Pymetrozine
Pyracarbolid
Pyraclostrobin
Pyraflufen
Pydiflumetofen
Pymetrozine
Pyracarbolid
Pyraclostrobin
Pyraflufen
Pyraflufen-ethyl (SP)
Pyraflufen-ethyl (Sum)
Pyridalyl
Pyridate (SP)
Quinclorac
Quinoxyfen
Quizalofop-ethyl (SP)
Rimsulfuron
Rotenone
Saflufenacil (SP)
Sebuthylazine
Sethoxydim
Spinetoram
Spinosad
Spirodiclofen
Spiromesifen
Spirotetramat (SP)
Spirotetramat (Sum)
Spirotetramatenol-glucoside
Spirotetramat-enol
Spirotetramat-ketohydroxy
Spirotetramat-monohydroxy
Spiroxamine
Sulcotrione
Sulfosulfuron
Sulfotep
Sulfoxaflor
Tebufenozide
Teflubenzuron
Tepraloxydim (SP)
Terbufos
Terbufos (Sum)
Terbufos Sulfone
Terbufos Sulfoxide
TFNA
TFNG
Thiabendazole
Thiacloprid
Thiamethoxam
Thiamethoxam (Sum)
Thidiazuron
Thifensulfuron-methyl
Thiobencarb
Thiocyclam
Thiodicarb
Thiofanox
Thiofanox Sulfone
Thiofanox Sulfoxide
Thiophanate-methyl
Tolfenpyrad
Tolylfluanid (SP)
Tolyfluanid (Sum)
Triasulfuron
Triazophos
Triazoxide
Trichlorfon
Tricresyl phosphate
Tricyclazole
Tridemorph
Trifloxystrobin
Triflumizole (SP)
Triflumizole (Sum)
Triflumizole FM-6-1
Triflumuron
Triforine (SQ)
Triticonazole
Vamidothion
Zoxamide
Phthalates — Testing Details
Phthalates are linked to a range of adverse health effects in numerous studies involving both animals and humans. They are especially concerning because phthalates are associated with disruption of the endocrine hormone system. Hormones act at extremely low concentrations and play essential roles in development–determining how cells, tissues, and organs form–as well as in metabolism, reproduction, and immune function; even small disruptions can therefore have outsized biological consequences. Epidemiological studies have shown that phthalate exposure can alter hormone levels in ways that interfere with these critical processes. Several health outcomes associated with phthalate exposure are summarized below.
Mamavation’s EPA-certified lab tested for the following phthalates. This is not a complete list of all the phthalates that are allowed to be present as an indirect food additive according to the FDA, however, this list goes above and beyond what is already restricted by the European Union or the State of California.
Diethyl phthalate (DEP)
Di-n-propyl phthalate (DPP)
Diisobutyl phthalate (DIBP)
Dibutyl phthalate (DBP)
Dihexyl phthalate (DnHP)
Benzyl butyl phthalate (BBP)
Dicyclohexyl phthalate (DCHP)
Diisononyl phthalate (DINP)
Di-n-octyl phthalate (DnOP)
Diisodecyl phthalate (DIDP)
bis(2-Ethylhexyl)phthalate (DEHP)
Dimethyl phthalate (DMP)
Bis(2-propylheptyl) Phthalate (DPHP)
Didecyl phthalate (DDP)
Heavy Metals: Lead, Cadmium, Mercury & Arsenic — Testing Details
Our EPA-certified laboratory tested each Omega-3 and DHA supplement for the following metals:
lead,
arsenic,
cadmium,
mercury
Mamavation then adjusted the lab results to align with California’s Proposition 65 by converting them into micrograms per day (ug/day) based on typical serving sizes. California uses some of the most health-protective exposure limits in the country. Instead of banning products outright, Proposition 65 requires companies to warn consumers when exposure to certain harmful chemicals exceeds established safety thresholds.
Proposition 65 has set “safe harbor” levels for several heavy metals tested in this study, including arsenic, cadmium, lead, and mercury. When exposures go above these levels, companies selling products in California must provide a warning label to inform consumers of potential risks related to cancer, birth defects, or other reproductive harm.
This approach is designed to put information directly in consumers’ hands, enabling informed choices about what they use and encouraging companies to reduce harmful contaminants whenever possible.
Here are the No Significant Risk Levels (NSRL) and the Maximum Allowable Dose Levels (MADL) established by the State of California for the heavy metals we tested:
Arsenic: 0.06 ug/day (inhalation), 10 ug/day (except inhalation)
Cadmium: 0.05 ug/day (inhalation), 4.1 ug/day (oral)
Lead: 0.5 ug/day level for reproductive toxicity, 15 ug/day (oral) for carcinogens
Mercury: no established levels in California, so the Federal maximum contaminant level for mercury would be followed instead.
Mamavation’s Raw Data From Our EPA-Certified Laboratory Ranked
Mamavation sent two sets of six Omega-3s & DHA supplements to different EPA-certified laboratories looking for traces of contaminants:
500+ pesticides (which is more comprehensive than other testing we’ve seen)
Glyphosate
40 PFAS “forever chemical” analytes, such as PFOA & PFOS. (This is different from our other studies, where we measured total organic fluorine.)
Heavy metals (lead, cadmium, mercury, & arsenic)
Phthalates
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Product Brands We Tested
To help our community make safer choices, Mamavation sent multiple popular Omega-3s & DHA supplement brands to EPA-certified laboratories for contaminant testing. We also included several additional products selected by our community to give consumers a broader picture of what families are already purchasing. All products were evaluated for pesticides, PFAS, glyphosate, heavy metals, and phthalates.
Below is the complete list of women’s multivitamin brands included in our investigation.
Omega-3s & DHA Supplements Tested by Mamavation
FullWell Women’s Fish Oil with DHA & EPA
Needed Omega-3 Pro Dietary Supplement
Nordic Naturals Ultimate Omega
Nordic Naturals Prenatal DHA
Ritual Omega-3 DHA+EPA from Microalgae Dietary Supplement
Thorne Prenatal DHA Dietary Supplement
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Not Our Favorite Omega-3s and DHABetter Omega-3s and DHABest Omega-3s and DHA
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