Omega-3 and Omega-6 Fatty Acids: Effects, Sources & Daily Requirements

In this article, you will learn why the right ratio of Omega-3 to Omega-6 is so important, which foods are rich in these fatty acids, and how much you should consume daily to optimally support your heart, brain, and immune system.

What are Omega-3 and Omega-6 fatty acids?

Both belong to the polyunsaturated fatty acids (PUFAs). They fulfill central tasks:

• Omega-3 fatty acids (EPA, DHA, ALA) have anti-inflammatory effects, support the cardiovascular system, promote brain function, and can lower the risk of certain chronic diseases.
• Omega-6 fatty acids (especially linoleic acid) are also important, for example, for skin, hair, and wound healing. However, they tend to be inflammatory when consumed in excessive amounts.

The problem: In Western diets, the ratio of Omega-6 to Omega-3 often stands at 15:1 or higher, while 5:1 or less is recommended (German Nutrition Society). An imbalance can promote chronic inflammation, heart problems, or joint complaints.

What effects are scientifically proven?

• Heart health: Numerous studies show that EPA and DHA can reduce the risk of arrhythmias and vascular calcification.
• Brain & psyche: Omega-3 is associated with better memory performance, concentration ability, and a lower risk of Alzheimer’s. A study from the University of Zurich (2025) showed that daily intake of 1 g of Omega-3 can measurably lower biological age.
• Anti-inflammation: A balanced ratio can reduce silent inflammation in the body and positively influence autoimmune diseases.

Natural sources of Omega-3 and Omega-6

To ensure adequate supply, it is worthwhile to incorporate various foods into your diet.

Plant sources

• Hemp seeds & hemp seed oil: Rich in alpha-linolenic acid (ALA, an Omega-3 fatty acid) as well as Omega-6. The ratio is about 3:1, close to the ideal.
• Flaxseeds & flaxseed oil: One of the best plant-based Omega-3 foods. Just 1 tablespoon of flaxseed oil covers almost the daily requirement for ALA.
• Chia seeds: Also rich in ALA, versatile (e.g., in pudding or smoothies).
• Walnuts: A good plant source of ALA and easy to integrate into daily life.
• Algal oil: A vegan alternative that also provides EPA and DHA.

Animal sources

Fatty fish and fish oil (herring, salmon, mackerel, sardines): Contain readily available EPA and DHA. Eggs & meat (from pasture-raised animals or feed enriched with Omega-3) can contain higher amounts of Omega-3.

How much per day?

The DGE recommends at least 250 mg EPA + DHA per day for adults. This corresponds to about two servings of fatty fish per week or 1–2 ml of high-quality algal oil daily.

For ALA (plant-based Omega-3 source), the following guidelines apply: Women: about 1.1 g per day. Men: about 1.6 g per day.

Practical quantity examples:

• 1 tablespoon of hemp seed oil (10 ml) contains about 2 g of ALA – significantly above the daily requirement.
• 20 g of walnuts (a handful) provide about 2 g of ALA.

What to consider with supplements and dietary supplements?

If you reach for fish, fish oil, or algal oil, it is worth paying attention to quality:

• Purity & freedom from pollutants (heavy metals, dioxins)
• Oxidation protection (Vitamin E as an antioxidant, pay attention to TOTOX value)
• Sufficient dosage: Good products contain 250–500 mg EPA+DHA per capsule.

Tips for everyday life

• Nuts and seeds as a snack or added to muesli.
• Use oils like hemp seed oil or flaxseed oil cold (do not heat!). Here are some recipe ideas.
• Incorporate fish 1–2 times a week or alternatively take algal oil.
• Consciously reduce sunflower or corn oil (rich in Omega-6).

Conclusion

Omega-3 and Omega-6 fatty acids are essential – what matters is the right ratio. While Omega-6 is usually abundant in our diet, we must actively ensure a good Omega-3 intake. Using hemp seed oil, flaxseed oil, walnuts, or fatty fish makes this easy. Those who rely on plant sources should also consider hemp - ideally in organic quality. Just 1 tablespoon of hemp seed oil per day can make a significant difference. This way, you not only support your heart and brain but also your long-term health and well-being.

Sources:

Nature Aging volume 5, pages 376–385 (2025). Individual and additive effects of vitamin D, omega-3 and exercise on DNA methylation clocks of biological aging in older adults from the DO-HEALTH trial. Heike A. Bischoff-Ferrari et al.

German Nutrition Society (DGE)

Vegan Society Austria