Brain development and cognitive function
Critical for brain development, memory, learning, and cognitive performance
DHA
Essential omega-3 fatty acid crucial for brain development, cognitive function, eye health, and neurological wellness throughout life
Scientific nameDocosahexaenoic acid (C22:6 n-3)
FormulaC22H32O2
Molecular weight328.49 g/mol
CAS6217-54-5
85
absorption score
9
safety / 10
50
USD per month
6
documented interactions
Check it against something
DHA with:
- Amylase
- Ashwagandha
- Avocado Oil
- BCAA (Branched-Chain Amino Acids)
- Beetroot Powder
- Beta-Alanine
- Bifidobacterium lactis
- Bifidobacterium longum
- Bovine Collagen
- Caffeine
- Calcium
- Calcium Bone Formula
- Calcium Carbonate
- Casein Protein
- Chicken Collagen
- Choline (Bitartrate)
- Chondroitin Sulfate
- Coconut Oil
- Collagen Peptides
- Comprehensive Immune Support Complex
- Comprehensive Multivitamin-Mineral Complex
- Creatine HCL
- Creatine Monohydrate
- D-Mannose
- Electrolyte Blend
- EPA
- Fish Oil (EPA/DHA)
- Folate (5-MTHF)
- Ginger
- Iron Fumarate
- Iron Sulfate
- Joint Mobility Formula
- Keratin
- Krill Oil
- L-Carnitine
- L-Citrulline
- Lactase
- Lactobacillus acidophilus
- Lactobacillus rhamnosus
- Lipase
- Magnesium Citrate
- Magnesium Glycinate
- Magnesium Oxide
- Marine Collagen
- Melatonin
- Modafinil
- Olive Oil Extract
- Omega-3 + Curcumin + Vitamin D Triple Anti-Inflammatory Formula
- Papain
- Protease
- Saccharomyces boulardii
- Turmeric
- Vitamin B12 (Cyanocobalamin)
- Vitamin B12 (Methylcobalamin)
- Vitamin C (Ascorbic Acid)
- Vitamin C (Sodium Ascorbate)
- Vitamin D3
- Whey Protein
- Zinc Gluconate
Nothing found
94
out of 100
Works better together
Take together — same timing window amplifies the synergy.
What it does
mechanism and evidence for each claimEye health and vision support
Essential for retinal health, visual development, and preventing age-related vision decline
Neurological health and neuroprotection
Supports nervous system health and may protect against neurodegenerative diseases
Pregnancy and infant development
Critical for fetal brain and eye development during pregnancy and breastfeeding
Mood support and mental wellness
May help support healthy mood and reduce symptoms of depression
Others take these for the same thing
Same goal, different mechanism — check any of them against this one
Vitamin B12 (Cyanocobalamin)
Energy & nerve support
250-1000 mcg
A
70%
Fish Oil (EPA/DHA)
Heart & brain health
1-2g EPA/DHA
A
85%
L-Theanine
Calm focus & stress relief
100-400mg
B
90%
Vitamin B8 (Inositol)
Mental health & PCOS support
2-18g (condition dependent)
B
95%
SAM-e
Mood support & liver health
400-800mg
A
70%
Lithium Orotate
Mood & brain support
1-20mg
C
60%
Every pair we checked
12 combinations scored by the engine
DHA + CLA (Conjugated Linoleic Acid)
High omega-6 intake reduces DHA effectiveness
Needs attention
58
DHA + Caffeine
No documented interaction either way
No known interaction
70
DHA + Creatine Monohydrate
No documented interaction either way
No known interaction
70
DHA + Calcium Carbonate
No documented interaction either way
No known interaction
70
DHA + Whey Protein
No documented interaction either way
No known interaction
70
DHA + Lactase
No documented interaction either way
No known interaction
70
DHA + Bovine Collagen
No documented interaction either way
No known interaction
70
DHA + Turmeric
No documented interaction either way
No known interaction
70
DHA + Fish Oil (EPA/DHA)
No documented interaction either way
No known interaction
70
DHA + Phosphatidylserine
Enhanced cognitive function and memory support
Works better together
78
DHA + Vitamin D3
Prevents oxidation of DHA and enhances stability
Works better together
82
DHA + EPA
Complementary omega-3 benefits for brain and cardiovascular health
Works better together
94
Dosage
Daily600-1,500 mg
Cognitive support1,000-2,000 mg daily
Pregnancy breastfeeding600-1,000 mg daily
Eye health600-1,200 mg daily
Aging neuroprotection1,000-1,500 mg daily
Before you take it
Pregnancyrecommended
When to expect it
First Effects4-6 weeks for initial cognitive improvements
Peak Benefits12-24 weeks for maximum brain and eye health benefits
Deficiency DevelopmentModern diets low in fish create widespread DHA deficiency
Toxicity OnsetGenerally safe - monitor for bleeding with very high doses
How to measure it
MarkerDHA blood levels, omega-3 index, cognitive function assessments
OptimalDHA levels >100 μg/mL, omega-3 index >8%
Deficient belowDHA levels <50 μg/mL, omega-3 index <4%
FrequencyMonitor every 3-6 months during supplementation
What people actually reported to the FDA
CAERS, 557 reports naming it as the suspectMost reported effects
Excluded from the list above: choking (38). Those are people struggling with the tablet itself, not with the compound.
Named as the suspect
557 reports
of 1,000+ that mention it at all
Serious outcome
83%
hospitalisation, emergency room or worse
Other Serious or Important Medical Event360
Hospitalization174
Visited a Health Care Provider117
Reports are voluntary and unverified — they record what someone experienced while taking something, not what the compound caused. Counts skew towards products people take a lot of, and a serious outcome is more likely to be reported than a mild one, so these are not rates. How we filter them →
What actually reaches you
The label counts the carrier, your body does not
Absorption
Very high 85 of 100 · best absorbed form of this compound
Delivered daily
892.5 mg
Cost per 100 mg delivered
$0.19 comparative — uses the absorption score, not a measured percentage
Works better with
+
Epa
Complementary omega-3 benefits for brain and cardiovascular health
EPA and DHA work synergistically for optimal omega-3 benefits · level A
+
Phosphatidylserine
Enhanced cognitive function and memory support
Both support neuronal membrane function and brain health · level B
+
Vitamin E
Prevents oxidation of DHA and enhances stability
Vitamin E acts as antioxidant protecting omega-3 fatty acids · level AWhat not to take with DHA
!
Omega 6 Excess
High omega-6 intake reduces DHA effectiveness
Competes for same enzymes and promotes inflammation · high significance
!
Trans Fats
Trans fats interfere with omega-3 metabolism and brain function
Disrupts fatty acid metabolism and neuronal membrane function · high significance
!
Alcohol Excess
Excessive alcohol may impair DHA utilization
Alcohol affects fatty acid metabolism and brain function · moderate significanceMedication interactions
Discuss these with a pharmacist before combiningMay enhance blood-thinning effects
What to do: Monitor INR and bleeding time carefully
May provide complementary benefits for attention and focus
What to do: Coordinate with healthcare provider for optimal dosing
Available forms
Ranks 4 of 5 among omega forms. Krill Oil absorbs better — 95%. Compare all forms →
DHA triglyceride form (natural): Superior absorption, Natural form, Better stability, Proven effectiveness
Food sources
Wild-caught salmon
1,000-1,500 mg DHA per 3.5 oz serving · 80
Sardines
700-1,200 mg DHA per 3.5 oz serving · 80
Mackerel
800-1,400 mg DHA per 3.5 oz serving · 80
DHA supplements (triglyceride form)
250-500 mg DHA per capsule · 85
Too little
- DHA deficiency symptoms:
- Cognitive decline including memory and learning difficulties
- Vision problems and poor eye health
- Mood disorders including depression and anxiety
- Poor brain development in children
- Increased risk of neurodegenerative diseases
- Reduced neuroplasticity and slower learning
Too much
- Generally safe with potential for mild adverse effects:
- Increased bleeding risk with very high doses
- Digestive discomfort including nausea and fishy burps
- Drug interactions with anticoagulants
- Safe for long-term use at appropriate doses including pregnancy
Who benefits most
pregnant-breastfeeding-women
Essential for fetal and infant brain development
600-1,000 mg daily
cognitive-health-seekers
Critical for brain function, memory, and learning
1,000-2,000 mg daily
eye-health-seekers
Essential for retinal health and visual function
600-1,200 mg daily
aging-adults
Supports cognitive function and prevents age-related decline
1,000-1,500 mg daily
children-adolescents
Critical for ongoing brain development and academic performance
300-600 mg daily (age-adjusted)Where to buy it
Look for DHA at 600-1,500 mg per serving. The form that matters here is DHA triglyceride form (natural).
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What else affects it
Beyond other supplements
!
Trans fats
Trans fats interfere with omega-3 metabolism and brain function
Disrupts fatty acid metabolism and neuronal membrane function
!
Alcohol excess
Excessive alcohol may impair DHA utilization
Alcohol affects fatty acid metabolism and brain functionHow it works
- Major structural component of brain tissue and neuronal membranes
- Essential for maintaining neuronal membrane fluidity and function
- Critical component of retinal photoreceptors for vision
- Supports neurotransmitter production and synaptic function
- Promotes neuroplasticity and new neural connections
- Influences gene expression related to brain development
Key findings
what the evidence supports- Essential for brain development and cognitive function
- Critical for eye health and visual development
- Strong evidence for neuroprotection and aging
- Proven safety during pregnancy and breastfeeding
Sources: NIH Examine.com · data reviewed 2026-08-02
Compiled by Denis, who maintains this database and holds no medical qualification — every figure here is sourced or derived, never asserted. How we calculate it →
Common questions
What are the benefits of DHA?
Documented effects: Brain development and cognitive function; Eye health and vision support; Neurological health and neuroprotection; Pregnancy and infant development. Critical for brain development, memory, learning, and cognitive performance
How much DHA should you take per day?
The common daily range is 600-1,500 mg. By goal — cognitive support: 1,000-2,000 mg daily; pregnancy breastfeeding: 600-1,000 mg daily; eye health: 600-1,200 mg daily; aging neuroprotection: 1,000-1,500 mg daily.
When is the best time to take DHA?
With meals for absorption. First effects are typically reported within 4-6 weeks for initial cognitive improvements.
What are the side effects of DHA?
At excessive doses: Generally safe with potential for mild adverse effects:, Increased bleeding risk with very high doses, Digestive discomfort including nausea and fishy burps, Drug interactions with anticoagulants, Safe for long-term use at appropriate doses including pregnancy. Safety rating at normal doses is 9 out of 10.
What should you not take with DHA?
Separate it from Omega 6 Excess, Trans Fats, Alcohol Excess by two to four hours. High omega-6 intake reduces DHA effectiveness
Does DHA interact with medications?
Documented interactions with anticoagulants, adhd-medications. Discuss these with a pharmacist before combining.
How do you know if you need DHA?
The marker is DHA blood levels, omega-3 index, cognitive function assessments, optimal range DHA levels >100 μg/mL, omega-3 index >8%. Common deficiency signs: DHA deficiency symptoms:, Cognitive decline including memory and learning difficulties, Vision problems and poor eye health, Mood disorders including depression and anxiety.