Nordic Naturals Prenatal DHA Unflavored Formula Review
Nordic Naturals Prenatal DHA Unflavored Formula is a fish oil supplement sold as softgels, which the label calls Fish Gels. A serving is 2 Fish Gels, and each container holds 90 servings. Per serving, the Supplement Facts list 10 calories, 1 g of total fat, 400 IU of vitamin D3 and 830 mg of total omega-3 fatty acids. The other ingredients are purified deep sea fish oil, the softgel capsule, D-alpha-tocopherol and vitamin D3. The directions printed on the label read: Suggested Use: Two fish gels daily, with food, or as directed by your health care professional or pharmacist. Buyers most often say the softgels are easy to swallow. Opinions on fishy smell and aftertaste are mixed, with some finding none and others noticing it, especially when they burp.
We don’t sell supplements. We help you make decisions and get the best price.
Lowest prices
We may earn a commission from some store links. How we choose.
Finding the lowest prices at the stores now. This takes a few seconds.
Products with nearly the same formula (Matched on the main ingredients)
Study, Trial or Testing Result Summary
Members OnlyHuman studies
We found no human studies that test this product or its ingredients for immune system support. The store listing names omega-3 fatty acids and vitamin D3, but no studies of either were given for this goal. No ingredient amounts were available from the label, so we cannot say whether any ingredient reaches a studied dose. Buyer feedback is strong overall: about 6554 ratings, with 94 percent positive. None of the 13 written reviews we read mention immune health. Buyers mainly describe it as a fish oil softgel taken during pregnancy, while breastfeeding or while trying to conceive. They praise the easy to swallow softgels and say it is gentle on the stomach. The most common complaints are fishy smell, fishy burps and aftertaste. One buyer warns that the softgels can melt or stick together in heat. Another bought it by mistake, thinking it was a full prenatal multivitamin. It is not a complete prenatal vitamin. For immune support specifically, there is no study evidence here, and buyers did not report on it. Animal and cell studies are never counted.
Review Totals and Summary
Members Only6,554 reviews · 94% positive
Buyers rate it fairly well overall. It carries about 6554 ratings across the stores that sell it, and 62% of the starred reviews below give 4 or 5 stars. Most praise comes from people who find the softgels easy to take, while the main complaints are fishy smell and aftertaste, and one buyer was confused by the label. **What buyers say it did for them:** Several buyers describe it as a DHA supplement they were glad to add during pregnancy or while trying to conceive. One says it "didn't make my stomach hurt." Another calls it "by far the best DHA supplement" they have tried. One buyer who is not pregnant says her hair got softer and her nails are healthy. Another says they "like the way I feel on this brand." **What they complain about:** Fish smell and burping are the most common complaints. One buyer says "if you belch be prepared for a second dose of that smell." Another says the smell "is so bad" that it cost the product a star. One buyer was unhappy that the softgels arrived stuck together. One buyer thought it was a full prenatal multivitamin and bought it by mistake, saying the label is confusing and that they did not know how to return it. **Taste, smell, pill size and form:** Opinions split here. Many call the softgels "easy to swallow" and not bulky. One says they "aren't bulky like some other prenatal pills." Some report no scent or no fishy taste, while others report a light scent or a tiny aftertaste. One buyer says they taste "absolutely horrible." Two buyers warn that softgels can melt or expand in heat or near a window. One buyer praises a strawberry flavor, which differs from the unflavored formula described here. **Value for money:** Buyers say little about price. One says they have not priced it and are unsure of the value. A few mention sealed packaging and ingredient quality, such as "quality of the ingredients seem to be much better." **Who it seems to suit and who it did not:** It seems to suit pregnant or breastfeeding buyers and those trying to conceive who want an easy softgel and can live with some fish smell. It suited people with sensitive stomachs well in one review. It suited people prone to acid reflux less well, since they notice burping and fishy smell. It did not suit the buyer expecting a complete prenatal multivitamin.
Biohacker Summary
Members Only8 of 10 recommend it
Both ingredients in this product are smaller ingredients, and the panel speaks about both of them. Vitamin D drew the most support: most of the panel recommends or uses it, and the reasons given include general health, brain health, longevity, bone health and getting through the fall and winter when there is less sun. One panelist takes 5000 IU of vitamin D3 in the morning, while another prefers to take it with a fat-containing meal for better absorption, and others suggest checking blood levels, with targets ranging from 40 up to 100 nanograms per milliliter. For omega-3 fatty acids, about half the panel recommends them for brain health, inflammation, cell membranes and fertility, with doses of 1 to 3 grams a day and 2 to 4 grams a day of combined EPA and DHA mentioned, and one panelist advises taking them with a fat-containing meal. The one caution came from a panelist who said the research on omega-3s is not strong for preventing serious heart disease, and nobody said they had stopped taking either one.
See all 10 biohackers →Hide the biohackers
Dr. Mark Hyman · Omega-3 Fatty Acids · neutral
- Explains why omega-3s are important for brain, mood, and healthy aging.
- Eats Zetopia's Atlantic salmon for Omega-3s and Vitamin D, especially in winter, noting that one serving provides as much EPA and DHA as two standard fish oil capsules.
- Consumes Zetopia's Atlantic salmon to get Vitamin D, particularly in the winter months, as it is one of the few foods that provides both Omega-3s and Vitamin D.
- Mentions that the body makes vitamin D from sunlight exposure, and a deficiency can hinder calcium absorption, which is crucial for strong bones.
- Recommends Vitamin D for health, stating that amazing things happen when patients' vitamin D statuses reach optimal levels.
- Mentions omega-3 fats as existing biomarkers that play a role in mental health, which Function Health includes in their measurements.
- Mentions vitamin D as an existing biomarker that plays a role in mental health, which Function Health includes in their measurements.
- Notes that vitamin D plays a role in immune function.
- Mentions that omega-3s are anti-inflammatory and helpful.
- Recommends checking vitamin D levels and states that if they had to pick one single intervention for immune health, vitamin D would be it.
- Tries to supplement with omega-3s for psoriasis and considers them the one clearly clinically effective skin nutrient for skin, hair, and nails.
- Dr. Hyman discusses vitamin D in relation to sun exposure patterns.
- States that vitamin D supplementation can help with oxidative stress.
- Mentions vitamin D as a key nutrient for supporting immune function.
Dr. Eric Berg · Vitamin D · neutral
- Lists Vitamin D as an ingredient found in sardines.
- Notes that one can of sardines contains 900 mg of omega-3s (EPA and DHA).
- Recommends Vitamin D3 because it's nearly impossible to get enough from food and most people don't get enough sun, advising to aim for blood levels of at least 50 to 80 ng/mL.
- Dr. Berg states that when nutrients like vitamin D are too low, fatigue and weakness can follow.
- Recommends Omega-3s from fish oil or cod liver oil to improve the omega-6 to omega-3 ratio, which should be around 2:1 or 1:1 but is often 10:1 or 20:1 for most people.
- Recommends focusing on vitamin D3 to support stronger bones if a neck hump is associated with osteoporosis.
- Recommends a minimum of 10,000 IU of vitamin D per day to support natural killer cells.
- Suggests that taking cod liver oil can help with flaky skin around the nose or forehead, which usually means too much omega-6 fat relative to omega-3 fat.
- Suggests that increasing vitamin D3 may help address the underlying problem of bruxism.
- Recommends fatty fish like salmon, sardines, and mackerel, which are high in omega-3 fatty acids (EPA and DHA) that reduce liver inflammation and prevent scarring.
- Dr. Berg warns that the recommended daily intake for vitamin D is based on a massive error and that the actual necessary amount is closer to 8,895 IU, with millions remaining deficient.
- States that magnesium is needed to absorb vitamin D.
- Recommends getting vitamin D levels tested to ensure they are between 50 and 70, as vitamin D is intimately involved in regulating prostate size.
- Recommends wild-caught salmon as a healthy food to eat every day, noting it contains about 2000 mg of omega-3s in just 3 ounces.
Dr. Rhonda Patrick · Vitamin D · neutral
- Notes that vitamin D from sunlight, food, or supplements needs to undergo conversions in the liver and kidneys to become its active hormone form, calcitriol.
- States that Vitamin D supplementation has been associated with a 40% lower dementia risk, and low levels are linked to a 50 to 80% higher risk.
- Notes that Omega-3s (EPA and DHA) are important for neuronal membranes, brain function, and resolving inflammation, and higher levels are associated with lower dementia risk.
- Recommends getting adequate vitamin D, noting that people taking vitamin D supplements have a 40% lower risk of dementia, while those with lower vitamin D have a 50-80% higher risk.
- Highlights omega-3 fatty acids as important for cell membranes, neurons, supporting brain cells, the blood-brain barrier, and regulating inflammation, which can contribute to memory problems.
- Mentions that EPA is an omega-3 examined in mortality analysis and found primarily in seafood.
- Vitamin D supplementation was linked to a 40% lower risk of dementia in an observational study of more than 12,000 older adults.
- Mentions that vitamin D also plays a role in maintaining muscle mass.
- Recommends ensuring adequate vitamin D intake for men's sperm health.
- States that Omega-3 fatty acids are very important for sperm health.
- Vitamin D and strength training alone did not, but adding them strengthened the effect on one clock, with the full combination slowing that measure by ~3.8 months.
- Omega-3s may help slow biological aging, with added benefits when combined with vitamin D and strength training. In a 3-year randomized trial of healthy, mostly active older adults, omega-3 alone slowed several DNA-based aging clocks.
- Recommends regular intake of omega-3 rich seafood and supplementation with omega-3 fatty acids if it's appropriate for one's lifestyle, as they are beneficial for the heart by resolving inflammation and preserving membrane fluidity.
- Notes that a 100 mg per day increase in omega-3 fatty acids was associated with lowering the risk of Alzheimer's disease and cognitive decline by 10%, and that it takes about two grams a day to get to a high omega-3 index if one has a low index.
Thomas DeLauer · Omega-3 Fatty Acids · recommends
- Recommends eating more omega-3s to turn over cell membranes more quickly.
- Recommends taking Vitamin D3 in the morning, between 6:00 and 10:00 a.m., to align with the body's natural metabolic activation phase and sunlight-triggered vitamin D production.
- Recommends fish oil supplements as an omega-3 source for gut health, as they help reduce inflammatory signaling while tissue repairs.
- Recommends high-dose omega-3s, specifically 2 to four grams of combined EPA and DHA daily, to lower hepatic fat output and improve chylomicron clearance, which helps with non-fasting triglycerides.
- Uses vitamin D3 in the fall and winter months when getting less sun, as it's important to supplement it then.
- Recommends taking a massive amount of vitamin D simultaneously with an early morning massive breakfast to help reset circadian rhythms and address hyperphagia.
- Recommends omega-3s, specifically 4 grams a day, to boost the muscle building response by making muscle cell membranes work better for the mTor switch to fire, and specifically mentions Pury for their clean, third-party tested omega-3s.
- Recommends Vitamin D, stating that it has receptors throughout the brain and deficiency can quickly impact brain and mood.
- Takes supplemental vitamin D because he is skin sensitive and from northern latitudes, limiting his UV exposure.
- Recommends taking vitamin D on non-liver days to ensure both nutrients get proper receptor access.
- Recommends consuming more omega-3s to help balance the mitochondrial membrane, as it will absorb more omega-3s instead of omega-6s.
- Recommends consuming more omega-3s to drive down inflammation.
- Takes Purity's liquid vitamin D3 with K2 because she is constantly inside during the day; D3 is for overall wellness and K2 helps the body absorb calcium properly.
- Recommends getting vitamin D, suggesting it can be obtained while walking.
Andrew Huberman · Omega-3 Fatty Acids · recommends
- Mentions that AG1 is giving away a free bottle of omega-3 co-enzyme Q10 with the first subscription to AG1 Pro.
- AG1 is giving away a free bottle of omega-3 coenzyme Q10 with your first subscription.
- Mentions that AG1 is giving away a free bottle of Omega-3 co-enzyme Q10 with the first subscription to AG1 Pro.
- Discusses Omega-3 Fatty Acids and EPA.
- Mentions that AG1 is offering a free bottle of Omega-3 co-enzyme Q10 with a first subscription to AG1 Pro.
- Recommends a free bottle of Omega-3 co-enzyme Q10 with the first AG1 Pro subscription.
- Mentions Omega-3s in the context of the microbiome and processed foods.
- Recommends Omega-3 co-enzyme Q10, which is offered as a free bottle with the first AG1 Pro subscription.
- States that getting 1 to 3 grams of EPA essential fatty acid per day can improve mood and cognitive function, supporting focus and concentration.
- Discusses Omega-3 Fatty Acids.
- Notes that most people are probably deficient in vitamin D and benefit from supplementing, but there's no point in doing it unless you're deficient for most things.
- Takes 5,000 IU of Vitamin D3 in the morning for longevity.
- Takes 5000 IU of Vitamin D3 in the morning for general health.
- States that Vitamin D is one of the critical nutrients with the best evidence for cognitive function and reducing the risk of dementia.
Dave Asprey · Vitamin D · uses
- Takes Vitamin DAKE from Suppgrade Labs.
- Suggests that vitamin D supports brain health, muscle function, and focus.
- Suggests that omega-3s may help slow aging and support cellular repair.
- Host Dave Asprey explains why correcting a vitamin D deficiency still makes sense for male fertility, even though supplementation did not improve overall semen parameters in a randomized trial.
- States that currently, he is only taking vitamin C and vitamin D.
- Recommends vitamin D, noting it's actually a hormone and that most people are deficient, even those who take it, because they don't take enough.
- Recommends omega-3s, noting that 1 gram a day slowed epigenetic aging by up to 4 months in a randomized trial of people over 70.
- States that most people on the spectrum are low in vitamin D and need more of it, mentioning his own product, Vitam DAKNE, which contains real vitamin A.
- Dave Asprey recommends Vitamin D3 with K2, explaining D3 is a hormone made from sunlight and K2 directs calcium into bones, not arteries, highlighting its low cost, widespread deficiency, and the ability to test its effectiveness.
- Dave Asprey recommends Omega-3, citing a randomized trial showing 1g a day slowed epigenetic aging in older adults, but warns that most people underdose due to low EPA and DHA content in standard capsules.
- Recommends Vitamin D as one of the most important supplements for overall health.
- Takes Vitamin DAKE from Suppgrade Labs because D3, A, K2, and E work together.
- A review of 41 human studies testing interventions against newer-generation epigenetic clocks found favorable changes for exercise, caloric restriction, omega-3s, plant-rich diets, multivitamins, a med, pitavastatin, and ketamine.
- Mentions taking vitamin D in the morning, comparing it to the daily dosing of testosterone.
Siim Land · Omega-3 Fatty Acids · recommends
- Recommends taking omega-3s, including EPA and DHA, with a fat-containing meal to increase absorption.
- Advises against taking vitamin D in the morning with other supplements because it is fat soluble and requires dietary fat for better absorption.
- Recommends taking Vitamin D with fat for better absorption.
- States that Vitamin D connects biology to light and that UVB reaching the skin enables its production.
- Increased his omega-3 intake to achieve a higher omega-3 index, which is associated with greater insulin sensitivity and better metabolic health markers.
- Increased his omega-3 index to 9.5% and notes that omega-3s have strong evidence for reducing elevated triglycerides.
- Mentions that EPA and DHA Omega-3s support heart and brain function and can lower triglycerides, with a higher omega-3 index associated with lower heart disease, Alzheimer's and mortality risk.
- Recommends Omega-3s for triglycerides and cardiovascular health, based primarily on human research, especially randomized controlled trials showing measurable benefits.
- Recommends choosing an omega-3 supplement from a brand that uses independent third-party testing and publishes a recent certificate of analysis, verifying EPA and DHA amounts, and testing for heavy metals, contaminants, and oxidation markers.
- Lists Omega-3s as one of 15 supplements backed by human studies.
- Explains that omega-3s can alter mitochondrial membranes and have broader cardiometabolic effects, making mitochondria more responsive to cellular signaling and oxidative stress from exercise, but they don't increase maximal mitochondrial respiration.
- Notes that 75% of people aren't meeting the daily recommendation for omega-3s and that Japanese people eat 2-3x more omega-3s per day than Americans or Europeans, which reflects in their higher omega-3 index.
- Thinks omega-3s have some of the strongest evidence and are worth considering.
- Thinks vitamin D has some of the strongest evidence and is worth considering.
Ben Greenfield · Vitamin D · recommends
- Notes that Vitamin D is actually a hormone and recommends patients aim for levels around 40 to 50, or even 60 for fracture healing, for optimal healing, as opposed to just above 20 which is considered normal.
- Mentions vitamin D as part of a bare-minimum protocol.
- Advises getting vitamin D levels between 60 and 100 nanograms per milliliter as a minimum step for overall health and to slow down heart disease.
- Notes that omega-3s have solid research behind them for fertility.
- Recommends omega-3 fatty acids, specifically EPA and DHA, at 1 to 3 grams per day for better sperm morphology and motility, noting that sperm membranes are rich in polyunsaturated fatty acids.
- Recommends getting Omega-3 from oily fish such as sardines, anchovies, mackerel, herring, and salmon with skin.
- Discusses why fatty fish or fish oil may matter more than plant-based omega-3s if seed oils are in one's diet.
- Has been taking Vitamin D3 K2 for over a decade.
- Notes that sunlight influences more than just vitamin D production.
- Recommends keeping vitamin D levels high, suggesting that a supplement is probably not a bad idea, especially given that many people are deficient due to spending most of their time indoors.
- Says that omega-3 fatty acids are a great way to feed the system and help with stress.
- Recommends getting enough vitamin D for blood pressure management.
- Recommends optimizing vitamin D levels to a serum score of around 50 to 80 nanograms per milliliter, as deficiency is linked to tinnitus volume and can assist with it.
- Recommends testing for and replenishing omega-3 fatty acids if levels are low, as they can affect the ability to maintain or preserve muscle, especially for those on GLP-1s.
Bryan Johnson · Vitamin D · uses
- Takes 5000 IU of Vitamin D3 in the morning for general health.
- Takes 5000 IU of Vitamin D3 in the morning for general health.
- Mentions that the sunlight assessment claims low vitamin D levels cause the immune system to misfire, and notes that their vitamin D has been measured.
- Takes 5000 IU of Vitamin D3 in the morning for longevity.
- He takes 5000 IU of Vitamin D3 in the morning for general health.
- Takes 5000 IU of Vitamin D3 in the morning for general health.
- Takes 5,000 IU of Vitamin D3 in the morning for longevity.
- Takes 5,000 IU of Vitamin D3 in the morning.
- Takes 5,000 IU of Vitamin D3 in the morning.
- He takes 5000 IU of Vitamin D3 in the morning for general health.
- Lists Omega-3 as a customer favorite.
- Recommends Omega 3 fatty acids as a supplement for skin health, noting they are in the Blueprint stack.
Peter Attia · Omega-3 Fatty Acids · neutral
- Peter and Michael explore the benefits of omega-3 fatty acids for cardiovascular trials and the challenge of delivering DHA to the brain.
- Mentions that some trials showing a benefit to PUFA were confounded by the inclusion of omega-3s, and argues that the literature on omega-3s is not super strong for decreasing hard cardiovascular disease endpoints.
- Took big doses of omega-3 postpartum to help maintain when she wasn't sitting down to eat full meals.
- Lists vitamin D as one of her staple supplements.
- Mentions consuming fatty fish, specifically sardines, as part of their diet, noting their high fat and protein content.
- Notes that several studies show patients taking vitamin D can reduce TPO levels and prolong the honeymoon period of Hashimoto's disease.
- States that in mouse studies, there was a combined effect of alpha ketoglutarate with vitamin D for both sexes.
- Uses vitamin D as an example of how people might dismiss its efficacy due to failed clinical trials that didn't adjust the dose or measure levels.
- In mouse studies, Peter Attia's team found a combined effect of AKG with Vitamin D for both sexes.
- Suggests that supplementing with lots of vitamin D might help overcome the negative effects of phenytoin on bone health by improving calcium absorption, though he is unaware of studies on this.
- Recommends Vitamin D3 as one of the 'big three' micronutrients for bone health, suggesting a daily intake of 800 to 1,000 IU, which can be obtained through sunlight or supplementation.
- Suggests that supplementing with lots of vitamin D might overcome the negative effects of phenytoin on bone health by counteracting increased catabolism of vitamin D and subsequent decreased calcium absorption.
- Recommends vitamin D for people who tend to be vitamin D deficient, such as those living in Portland, Oregon.
- Peter discusses how omega-3s from fish oil impact inflammation, heart health, and brain function, as well as the strengths and limitations of current research.
RAL Summary
Members OnlyTier 4 for Immune Health
Tier 3 needs some study support, but no human studies on immune support were given for any of its ingredients, so the evidence is thin and the product belongs in tier 4. So it is graded Tier 4, lower than the rules alone gave.
- Emerging: not enough evidence to rank higher yet.
- No human studies on this goal for its ingredients.
More Details
Members OnlyBody systems · Combine with · Possible side effects
Body systems: Immune system, Digestive system
Possible side effects: Buyers report fishy smell, fishy burps and aftertaste, which are worse for people prone to acid reflux. No study side effects were given.
Supplement Facts
Vitamin D3 400 IU · Total Omega-3 Fatty Acids 830 mg
| Calories | 10 | |
| Total Fat | 1 g | |
| Vitamin D3 | 400 IU | |
| Total Omega-3 Fatty Acids | 830 mg | † |
Other ingredients: Purified deep sea Fish Oil, Softgel Capsule, D-Alpha-Tocopherol, Vitamin D3.
Directions: Suggested Use: Two fish gels daily, with food, or as directed by your health care professional or pharmacist.
Barcode (UPC) 768990017490 · Label source: NIH label database · Report a label change
Other sizes and barcodes: 90 Softgel(s), UPC 7 68990 01741 4 (on market); 180 Softgel(s), UPC 7 68990 01748 3 (on market); 180 Softgel(s), UPC 7 68990 01748 3 (not checked yet); 90 Softgel(s), UPC 7 68990 01741 4 (off market)
Show entire label
More immune health products
Members OnlyThe highest ranked for the same goal
Read more
Our articles on this subject
- How to Improve Gut Health Naturally: Fiber, Foods and the Probiotic Strains With Human TrialsArticle · Sep 15, 2026
- How to Build a Longevity Supplement Stack: An Evidence-First ReviewArticle · Sep 7, 2026
Graded November 11, 2026 by the Reverse Age Lab evidence engine, from human studies, real reviews and our biohacker panel. How we grade. Is this medical advice? No. Rala organizes the published evidence; go over any change with your doctor, especially if you take meds.
Privacy policyConsumer health dataAffiliate disclosureTermsDo Not Sell or Share My Personal InformationCookie settings