Omega-3 essential fatty acids are a nutritional cornerstone for women’s health across every decade of life.
Whether you’re navigating hormonal transitions, supporting brain health during your busiest years, or building resilience as you age, omega-3s play a quiet but powerful role in the systems that keep you feeling your best.
Unlike other nutrients that your body can manufacture, omega-3 fatty acids must come from food or supplements.
Most South African women fall short of recommended intake through diet alone, particularly when it comes to EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid) — the long-chain forms found in marine sources that your body uses directly.
Understanding how omega-3s support your specific health needs helps you make informed choices about supplementation.
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What are Omega-3 Fatty Acids?
Omega-3s belong to a family of polyunsaturated fats defined by their chemical structure. The three main forms relevant to women’s health are ALA (alpha-linolenic acid) from plant sources, and EPA and DHA from marine sources¹.
Your body cannot produce these fats on its own — hence the term “essential.” Unlike the omega-9 fats your body manufactures naturally, omega-3s must be supplied through diet or supplements.
Cold-water fatty fish like salmon and mackerel contain the highest concentrations of EPA and DHA, but unless you eat these regularly, you’re likely not meeting your needs through food alone.
Plant-based sources like flaxseeds and walnuts provide ALA, but the conversion to usable EPA and DHA is remarkably inefficient — your body uses less than 10% of the ALA you consume for these critical forms.
This is why supplementation with marine-derived omega-3s is particularly important for women who don’t eat seafood regularly or who follow plant-based diets.
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Hormonal Benefits of Omega-3s
Your menstrual cycle is regulated by complex interactions between hormones, inflammation, and your nervous system — all systems that omega-3s influence directly.
Research published in the American Journal of Clinical Nutrition shows that women with adequate EPA and DHA levels experience fewer period symptoms, including milder cramping and more stable mood fluctuations throughout their cycle².
EPA, in particular, helps regulate prostaglandins — hormone-like compounds that trigger uterine contractions during menstruation. By moderating prostaglandin production, omega-3s may help ease the intensity of menstrual discomfort.
Additionally, because these fats support serotonin signalling in the brain, they may help stabilise mood-related symptoms that often accompany hormonal shifts, particularly during the luteal phase of your cycle.
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Supporting Cognitive Function Across Life Stages
DHA comprises roughly 30% of your brain’s grey matter, making it essential for memory formation, focus, and cognitive performance³.
As women age, particularly during perimenopause and menopause when oestrogen levels decline, brain health becomes increasingly important — oestrogen normally protects cognitive function, and omega-3s partially offset this loss.
A meta-analysis of 19 clinical trials found that women with higher DHA intake demonstrated better verbal memory, processing speed, and sustained attention⁴.
For women balancing career, family, and personal goals, adequate DHA supports the mental clarity needed during demanding years. Beyond midlife, omega-3 supplementation may help maintain cognitive resilience as you age.
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Supporting Cardiovascular Health
Cardiovascular disease is a leading cause of death among South African women, yet many remain unaware of their risk.
Before menopause, oestrogen offers natural cardiovascular protection — but after menopause, women’s heart disease risk rises sharply and eventually exceeds men’s⁵.
Omega-3 fatty acids work through multiple pathways to support heart health. EPA and DHA reduce triglycerides (fatty compounds in the blood that increase cardiovascular risk), support healthy blood pressure, and promote flexible, responsive blood vessel function.
Research shows that women taking omega-3 supplements demonstrate measurably lower cardiovascular risk markers, with benefits becoming more pronounced in women over 50⁶.
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Joint Health and Anti-Inflammatory Support
One in four South African women over 45 experiences joint discomfort, a figure that climbs sharply after menopause when the anti-inflammatory effects of oestrogen wane.
Omega-3s address this through their potent anti-inflammatory action, which is particularly valuable during hormonal transitions.
EPA reduces the production of inflammatory molecules called cytokines and prostaglandins, directly addressing joint comfort and mobility⁷.
Women who supplement with omega-3s report improved ease of movement, particularly in weight-bearing joints like knees and hips.
The benefit compounds over time — consistent supplementation for 8–12 weeks produces noticeable effects on joint function and overall comfort during daily activity.
READ MORE | A happy, healthy pregnancy starts with optimal nutrition
Supports Pregnancy and Postpartum Wellbeing
For women planning pregnancy or already pregnant, DHA is non-negotiable. This fatty acid drives foetal brain and eye development, particularly during the third trimester when foetal DHA accumulation peaks.
Adequate maternal DHA intake is associated with better infant cognitive outcomes and visual development⁸.
Beyond pregnancy, omega-3s support postpartum recovery and emotional wellness. The dramatic hormonal shifts after birth, combined with sleep deprivation and physical recovery, can challenge mood stability.
Research suggests that women with adequate omega-3 intake experience more stable mood during the postpartum period⁹. If you are pregnant or breastfeeding, ensure you use a purified, third-party tested supplement to avoid exposure to mercury or other contaminants.
How to Take Omega-3s
Most health authorities recommend 500–1,000 mg daily of EPA and DHA combined for baseline health maintenance.
Women seeking to address specific concerns — such as menstrual symptoms or joint comfort — may benefit from doses at the higher end of this range (800–1,000 mg daily).
Always check the supplement label for actual EPA and DHA content, not just total fish oil weight. A 1,000 mg fish oil capsule may contain only 300 mg of combined EPA and DHA — the rest is filler oil with minimal therapeutic benefit.
Take your omega-3 supplement with a meal containing fat. This triggers the release of bile and digestive enzymes, which improve absorption. Taking omega-3s with food also eliminates the “fishy burp” that deters many women from consistent use.
Morning or evening dosing matters less than consistency — daily supplementation allows EPA and DHA to accumulate in your cell membranes over time, where they exert their benefits. Because your body cannot manufacture these essential fats and they’re required for ongoing cellular function, daily year-round use is both safe and recommended.
References:
- Krupa KN, Fritz K, Parmar M. Omega-3 Fatty Acids. [Updated 2024 Feb 28]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2026 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK564314/.
- Nichols PD, Petrie J, Singh S. Long-chain omega-3 oils-an update on sustainable sources. Nutrients. 2010 Jun;2(6):572-85. doi: 10.3390/nu2060572. Epub 2010 May 26. PMID: 22254042; PMCID: PMC3257669.
- Mariamenatu AH, Abdu EM. Overconsumption of Omega-6 Polyunsaturated Fatty Acids (PUFAs) versus Deficiency of Omega-3 PUFAs in Modern-Day Diets: The Disturbing Factor for Their “Balanced Antagonistic Metabolic Functions” in the Human Body. J Lipids. 2021 Mar 17;2021:8848161. doi: 10.1155/2021/8848161. PMID: 33815845; PMCID: PMC7990530.
- Gutierres D, Pacheco R, Reis CP. The Role of Omega-3 and Omega-6 Polyunsaturated Fatty Acid Supplementation in Human Health. Foods. 2025 Sep 23;14(19):3299. doi: 10.3390/foods14193299. PMID: 41097470; PMCID: PMC12524211
- DiNicolantonio JJ, O’Keefe J. The Importance of Maintaining a Low Omega-6/Omega-3 Ratio for Reducing the Risk of Autoimmune Diseases, Asthma, and Allergies. Mo Med. 2021 Sep-Oct;118(5):453-459. PMID: 34658440; PMCID: PMC8504498.
- Dighriri IM, Alsubaie AM, Hakami FM, Hamithi DM, Alshekh MM, Khobrani FA, Dalak FE, Hakami AA, Alsueaadi EH, Alsaawi LS, Alshammari SF, Alqahtani AS, Alawi IA, Aljuaid AA, Tawhari MQ. Effects of Omega-3 Polyunsaturated Fatty Acids on Brain Functions: A Systematic Review. Cureus. 2022 Oct 9;14(10):e30091. doi: 10.7759/cureus.30091. PMID: 36381743; PMCID: PMC9641984.
- Thielecke F, Blannin A. Omega-3 Fatty Acids for Sport Performance-Are They Equally Beneficial for Athletes and Amateurs? A Narrative Review. Nutrients. 2020 Nov 30;12(12):3712. doi: 10.3390/nu12123712. PMID: 33266318; PMCID: PMC7760705
- Abdelhamid AS, Brown TJ, Brainard JS, Biswas P, Thorpe GC, Moore HJ, Deane KH, Summerbell CD, Worthington HV, Song F, Hooper L. Omega-3 fatty acids for the primary and secondary prevention of cardiovascular disease. Cochrane Database Syst Rev. 2020 Feb 29;3(3):CD003177. doi: 10.1002/14651858.CD003177.pub5. PMID: 32114706; PMCID: PMC7049091.
- Golabi S, Robahat T, Madjdinasab N, Kamyari N, Naghashpour M. Omega-3 Fatty Acids Supplementation and Neuroprotection, Inflammation, Fatigue, and Physical Activity in Multiple Sclerosis: A Randomized Controlled Trial. Food Sci Nutr. 2025 Sep 1;13(9):e70884. doi: 10.1002/fsn3.70884. PMID: 40905016; PMCID: PMC12402609.
Author: Pedro van Gaalen
When he’s not writing about sport or health and fitness, Pedro is probably out training for his next marathon or ultra-marathon. He’s worked as a fitness professional and as a marketing and comms expert. He now combines his passions in his role as managing editor at Fitness magazine.
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