Omega-3 deficiency: signs, risks and advice from doctors
What are Omega-3s and why are they critically important?
Omega-3s are essential polyunsaturated fatty acids that support brain, heart, immune, and vision function. The human body cannot synthesize them on its own, so daily intake with food is a vital necessity.
Main types of Omega-3:
ALA (alpha-linolenic acid) — comes from plant sources
EPA and DHA — found in marine fish, seafood and fish oil
According to cardiologist Olena Tokar, “Omega-3s aren’t just about preventing heart attacks. They’re daily lubrication for your blood vessels and brain cells.”
How to recognize an Omega-3 deficiency
Signs of Omega-3 deficiency can be general and gradually increasing:
dryness and peeling of the skin
brittle nails, brittle hair
constant fatigue, irritability
depressed mood, anxiety
difficulty concentrating
frequent colds, inflammatory diseases
joint pain
dry eye syndrome
in children - hyperactivity, learning difficulties
As nutritionist Natalia Litvin notes, “One of the most common manifestations of Omega-3 deficiency in patients is not worsening heart condition, but impaired cognitive function, mood problems, and visual strain.”
Causes of Omega-3 deficiency
| Reason | How does it affect |
|---|---|
| Lack of fatty fish in the diet | Low intake of DHA and EPA |
| Predominance of Omega-6 in the diet | Fatty acid competition that reduces Omega-3 absorption |
| Fat malabsorption | Chronic intestinal diseases, pancreatitis, gallstone disease |
| High needs | Pregnancy, lactation, sports activities, stress |
| Dietary restrictions | Veganism or a strict plant-based diet without EPA/DHA alternatives |
Endocrinologist Andriy Marchenko notes: “Low Omega-3 levels are often combined with elevated homocysteine, which increases the risk of cardiovascular catastrophes even at a young age.”
What is the danger of a prolonged deficit?
increased risk of heart attacks and strokes
depression, anxiety disorders
neurodegenerative diseases
worsening skin condition, eczema, psoriasis
hormonal imbalances
immune disorders
in children - decreased mental development, bad behavior, sleep disturbances
How to detect Omega-3 deficiency
The most accurate method is blood test for Omega-3 index, which shows the percentage of EPA + DHA in red blood cell membranes.
<4% — high risk
4–8% — permissible level
8% — optimal level for heart and brain protection
The doctor can also assess the patient's condition based on indirect signs, combined with food diary data.
How to fill the Omega-3 deficiency
Through diet
fatty sea fish (salmon, mackerel, sardines) — 2–3 times a week
flax seeds, chia seeds, walnuts
rapeseed and linseed oil
seafood, avocado, spinach
Through additives
EPA+DHA supplements: 250–500 mg per day for prevention
for children - in a special form and dose
for vegans — microalgae supplements
Dietitian Yuriy Gorbach advises: “Choose certified supplements with high bioavailability. It is especially important to check the source of raw materials and the content of heavy metals.”
Director of Medi Lab Plus LLC, a doctor of the highest category. Has over 45 years of practical experience in medicine and laboratory diagnostics. Founder and head of the laboratory since 2007. More details…