DHA (docosahexaeonic acid) (Docosahexaenoic Acid)

Other names
Synopsis
Uses: Health Conditions
Uses: Body Systems
Products

Other names

Algal DHA
Fish Oil DHA
DHA Triglyceride Form
DHA Ethyl Ester

Synopsis

DHA (docosahexaenoic acid) is a long-chain omega-3 polyunsaturated fatty acid (PUFA) essential for the development and maintenance of the brain, eyes, and nervous system. It is primarily found in cold-water fatty fish (like salmon, sardines, and mackerel), algae, and in smaller amounts in grass-fed animal products. DHA is one of the two most important marine omega-3s (alongside EPA—eicosapentaenoic acid), and is a critical structural component of cell membranes, especially in the retina and cerebral cortex.

DHA is known for:

Supporting brain development during pregnancy, infancy, and early childhood
Enhancing cognitive function and memory, particularly in aging adults
Promoting eye health, especially in the prevention of age-related macular degeneration (AMD)
Reducing inflammation and supporting neurological resilience
Supporting cardiovascular health, including lowering triglycerides and improving heart rate variability
Playing a role in mood regulation, potentially reducing symptoms of depression, anxiety, and postpartum mood disorders

In supplementation, DHA is typically sourced from fish oil or vegan algae oil, the latter being especially important for vegetarians, vegans, and pregnant individuals seeking mercury-free sources. It is commonly included in prenatal vitamins, brain health formulas, and eye support blends. Dosage typically ranges from 200–1000 mg daily, often paired with EPA for broader anti-inflammatory effects.

Historical Use
DHA as an isolated compound was identified and studied in the 20th century, so it does not have direct traditional or herbal use. However, the traditional diets that were naturally high in DHA—such as those of Indigenous Arctic communities, coastal Mediterranean populations, and Pacific Island cultures—have long been associated with exceptional cognitive, cardiovascular, and reproductive health.

For example:

The Inuit diet, rich in seal, whale, and cold-water fish, provided abundant DHA and EPA, correlating with low rates of heart disease and inflammatory disorders.
The Mediterranean diet, high in fish and olive oil, supported longevity and cognitive protection.
In Ayurveda, fish and marine oils were considered nourishing for ojas (vitality) and brain tissue (majja dhatu), although DHA itself was not identified.

Today, DHA is a cornerstone nutrient in clinical nutrition, neurology, pediatrics, and integrative medicine, especially in protocols for:

Pregnancy and lactation support
ADHD and neurodevelopmental disorders
Cognitive aging and neurodegenerative diseases
Chronic inflammation and eye health

DHA continues to be studied for its neuroprotective, cardioprotective, and anti-aging effects and is widely regarded as essential throughout the life cycle—from fetal development to elderly brain maintenance.

Uses: Health Conditions

Cholesterol (low) (Traditional)
Circulation (to the brain) (Traditional)
Concentration (poor) (Traditional)
Concussions (Traditional)
Confusion (Traditional)
Convulsions (Traditional)
Coordination (Traditional)
Down Syndrome (Traditional)

Body Systems

Arteries (Traditional)
Sympathetic Nervous System (Traditional)
Brain (Traditional)
Circulatory System (Traditional)
Eyes (Traditional)
Parasympathetic Nervous System (Traditional)
Reproductive System (Traditional)

Products containing this ingredient

Health Concerns

Brands