Understanding and Optimizing DHA Levels

Latest Posts

Table of Contents

Understanding and Optimizing DHA Levels

Date of Content: January 13, 2024
Written by: Harvey Talento
Reviewed by: Maarit Tiirikainen, PhD



Docosahexaenoic acid (DHA) is a type of omega-3 fatty acid vital for our health, and DHA levels in our bodies play a significant role in our overall well-being.

This long-chain fatty acid is a crucial component of cell membranes throughout the body and plays a significant role in transmitting messages between nerves.

DHA is naturally produced in small quantities by our bodies, but to achieve adequate amounts, DHA needs to be obtained through dietary sources or supplements. Dietary sources of DHA include cold-water fish, such as salmon, mackerel, and trout. It is also available as a supplement, such as via fish oil preparations.

DHA Levels

Importance of DHA in Wellness

Our body’s ability to work well is closely linked to our DHA levels. This important omega-3 fatty acid is key to keeping our essential bodily processes balanced. The following are some of its fundamental contributions.

Cellular Health

DHA is a crucial component of the membrane of each cell in our body. It helps maintain the fluidity and permeability of cell membranes, which is essential for the proper functioning of cells.

Brain Function

Heart Health

DHA and another omega-3 fatty acid called eicosapentaenoic acid (EPA) may help reduce inflammation and your risk of chronic diseases, such as heart disease. Some studies suggest that DHA may be more effective than EPA at improving several markers of heart health.

Maintaining adequate levels of DHA in the body is essential for optimal health and well-being. It can be obtained through dietary sources or supplements, ensuring that our bodies function at their best.

Genetics of DHA Levels

The DHA levels in our body can be influenced by various genetic factors. This section will explore the specific genes that may affect DHA levels.

FADS1 and FADS2 Genes

The FADS1 and FADS2 genes encode desaturase enzymes. These enzymes play a crucial role in converting dietary alpha-linolenic acid (ALA) into DHA. Single nucleotide polymorphisms (SNPs); variations at a single position in the DNA sequence within these genes can influence the efficiency of this conversion process. For instance, minor alleles of SNPs in FADS1 (such as rs174548) and FADS2 were associated with higher levels of ALA and lower levels of DHA.


The ELOVL2 gene encodes an enzyme known as elongase. This enzyme is involved in the extension of the carbon chain of fatty acids, a critical step in the production of DHA. Variations in the ELOVL2 gene can influence the levels of DHA in the body. For example, minor alleles of the SNP rs2236212 in ELOVL2 were associated with higher levels of DHA.

Interaction of FADS1, FADS2, and ELOVL2 Genes with Dietary Intake

Interestingly, the impact of these genetic variations on DHA levels may also affect the effect of the dietary intake of omega-3 fatty acids. For instance, in individuals with certain genetic variants in the FADS1 and FADS2 genes, dietary supplementation with fish oil led to a greater increase in DHA levels compared to those without these variants. This suggests that the effect of diet on DHA levels can be moderated by our genetics.

In conclusion, our genetics, particularly variations in the FADS1, FADS2, and ELOVL2 genes, can significantly influence the levels of DHA in our body. Understanding these genetic influences can provide valuable insights into how we can optimize our DHA levels for better health.

Non-Genetic Factors Influencing DHA Levels

Aside from genetics, several factors, such as our diet and lifestyle, can impact the DHA levels in our bodies. Understanding these influences is key to ensuring we maintain the right levels of this important omega-3 fatty acid for our overall well-being.

Dietary Intake

Boosting DHA levels in the body is most directly achieved through dietary intake. Incorporating foods rich in DHA, such as cold-water fish like salmon, mackerel, and trout, along with nuts, seeds, and certain plant oils, can significantly contribute to meeting this essential omega-3 fatty acid requirement. Additionally, fish oil supplements serve as another convenient source of DHA.


Lifestyle factors such as physical activity and alcohol consumption can also impact DHA levels. Regular exercise can help improve the body’s utilization of DHA, while excessive alcohol can interfere with DHA absorption.

Health Status

Various health conditions can impact DHA levels in the body. For example, individuals with diabetes may experience changes in the metabolism of DHA. Additionally, conditions affecting fat absorption, like Crohn’s disease, can also influence DHA levels.

Age and Sex

DHA levels can be influenced by age and gender. Women often have higher DHA levels than men, possibly due to the effects of estrogen. Moreover, DHA levels tend to decrease with age, emphasizing the dynamic nature of these levels as we grow older.

How To Boost DHA Levels

Improving the DHA levels in our body involves a combination of dietary changes and lifestyle modifications. Here are some strategies that can help:

  • Increase Omega-3 Intake

Consuming EPA and DHA directly from foods and/or dietary supplements is the only practical way to increase the levels of these fatty acids in the body. Foods rich in DHA include cold-water fish like salmon, mackerel, and trout. Algal oil, a plant-based source of DHA, is also an option, especially for vegetarians and vegans.

  • Limit Omega-6 Intake

While omega-6 fatty acids are essential for health, a high ratio of omega-6 to omega-3 in the diet can inhibit the conversion of ALA to DHA. Therefore, try to balance your intake of these fatty acids by reducing the consumption of omega-6-rich foods such as vegetable oils and processed foods.

  • Regular Exercise

Regular physical activity can help improve the body’s utilization of DHA. It also helps control blood sugar levels and lowers the risk of heart disease, which is beneficial for overall health.

  • Adequate Hydration

Dehydration can cause blood sugar levels to spike, which can affect the metabolism of DHA. Therefore, it’s important to stay well-hydrated.

  • Limit Alcohol Consumption

Excessive alcohol can interfere with DHA absorption. It’s advisable to limit alcohol intake to moderate levels as defined by health guidelines.

  • Avoid Smoking

Smoking can hurt overall health and may interfere with the absorption and utilization of essential nutrients, including DHA.

Remember, it’s always best to consult with a healthcare provider before making significant changes to your diet or lifestyle, especially if you have underlying health conditions or are on medication.

About the LifeDNA Vitamins and Supplements Report

Unlocking personalized insights into your DHA levels has never been easier! Explore the LifeDNA Vitamins and Supplements Report, which includes the DHA Levels Trait Report. This report delves into your unique genetic makeup, providing valuable information about how your body processes and utilizes DHA.

By understanding the genes related to DHA, you can make more informed decisions about your nutrition and supplementation. LifeDNA’s comprehensive report empowers you to tailor your approach to supporting optimal DHA levels based on your genetic traits.

Invest in your wellness today!


  • Docosahexaenoic acid (DHA) is an essential omega-3 fatty acid crucial for cell membranes and nerve function. Obtaining sufficient DHA through diet or supplements is vital for overall well-being.
  • DHA is integral for cellular health, cognitive function, and heart health. Its presence in the brain and its anti-inflammatory properties contribute to overall wellness.
  • Genetic factors, especially variations in FADS1, FADS2, and ELOVL2 genes, influence how the body metabolizes and utilizes DHA. Understanding these genetic aspects provides insights into optimizing DHA levels.
  • DHA levels are affected by factors such as diet, lifestyle, health status, age, and gender. Being aware of these influences helps in maintaining the right balance for optimal well-being.
  • Boosting DHA involves a combination of increasing omega-3 intake, balancing omega-6, regular exercise, adequate hydration, and lifestyle adjustments. These strategies can positively impact DHA levels for better health.


  1. https://ods.od.nih.gov/factsheets/Omega3FattyAcids-HealthProfessional/
  2. https://ods.od.nih.gov/factsheets/Omega3FattyAcids-Consumer/
  3. https://ods.od.nih.gov/factsheets/Omega3FattyAcids-HealthProfessional/
  4. https://ods.od.nih.gov/factsheets/Omega3FattyAcids-Consumer/
  5. https://www.nccih.nih.gov/health/tips/things-to-know-about-omega-fatty-acids
  6. https://ods.od.nih.gov/factsheets/Omega3FattyAcids-Consumer/
  7. https://journals.plos.org/plosgenetics/article?id=10.1371/journal.pgen.1002193
  8. https://journals.plos.org/plosgenetics/article?id=10.1371/journal.pgen.1002193
  9. https://link.springer.com/article/10.1007/s00394-017-1529-5
  10. https://ods.od.nih.gov/factsheets/Omega3FattyAcids-HealthProfessional/
  11. https://www.mayoclinic.org/drugs-supplements-fish-oil/art-20364810
  12. https://ods.od.nih.gov/factsheets/Omega3FattyAcids-HealthProfessional/

Customer Reviews

Christopher Devlin
Christopher Devlin
LifeDNA Customer
Read More
I am so impressed with this service. I have even discussed these recommendations with my health care providers and they are all impressed too! I can’t compare it with other services as I have only tried this but I recommend. Also I think I pulled my genetics in from ancestry too which was super convenient.
LifeDNA Customer
Read More
Great source of information I was looking for a platform to make use of my existing raw data from Ancestry. I’m glad I found LifeDNA. I originally took a DNA test to learn about my roots and it’s great to know that my DNA could also play a big role in my health, diet, and even my skin. Overall, all the reports are incredible.
Shiraz Dole
Shiraz Dole
LifeDNA Customer
Read More
It is crazy how I felt that I had a strong understanding of my bodies needs, but after having my DNA analyzed by the LifeDNA team, I realized that there was so much I still did not know.
Doc Sheila Lim
Doc Sheila Lim
LifeDNA Customer
Read More
I got some pretty useful insight that helped me with my diet.

*Understanding your genetics can offer valuable insights into your well-being, but it is not deterministic. Your traits can be influenced by the complex interplay involving nature, lifestyle, family history, and others.

Our reports have not been evaluated by the Food and Drug Administration. The contents on our website and our reports are for informational purposes only, and are not intended to diagnose any medical condition, replace the advice of a healthcare professional, or provide any medical advice, diagnosis, or treatment. Consult with a healthcare professional before making any major lifestyle changes or if you have any other concerns about your results. The testimonials featured may have used more than one LifeDNA or LifeDNA vendors’ product or reports.