Dangers & Harmful Side Effects of Flaxseed Oil
Flaxseed oil is a natural supplement derived from the seed of a plant called Linum usitatissimum. This type of oil contains the essential fatty acids omega-3 and omega-6, which your body needs to function normally. Health professionals with the National Center for Complementary and Alternative Medicine note that treatment with flaxseed oil may alleviate arthritis pain and help keep your heart healthy. Talk with your physician about the dangers and harmful side effects of flaxseed oil before you begin to use this natural supplement.
Treatment with flaxseed oil may cause harmful upset stomach side effects, such as nausea, bloating or stomach pain, MedlinePlus reports. You may also experience constipation or diarrhea, which may exacerbate upset stomach side effects. Seek care from your primary care doctor if you develop recurrent or persistent bouts of diarrhea or constipation. Chronic diarrhea may increase your risk of dehydration, while chronic constipation may result in an impacted stool.
- Treatment with flaxseed oil may cause harmful upset stomach side effects, such as nausea, bloating or stomach pain, MedlinePlus reports.
- You may also experience constipation or diarrhea, which may exacerbate upset stomach side effects.
The Toxicity of Linseed Oil
Flaxseed oil may interfere with the way in which your body absorbs other types of vitamins, minerals or oral medications you consume. If possible, do not take flaxseed oil at the same time as other medications or supplements in order to prevent this interaction. Let your doctor know if you are taking medications to lower your blood sugar or cholesterol levels before you begin taking flaxseed oil, the University of Maryland Medical Center warns. Flaxseed may also enhance the effect of blood-thinning medications and topical steroids.
- Flaxseed oil may interfere with the way in which your body absorbs other types of vitamins, minerals or oral medications you consume.
Using flaxseed oil could affect the way in which your blood clots and may increase your risk of experiencing bleeding problems, MayoClinic.com warns. If you are scheduled for a surgical or dental procedure or have a bleeding disorder, inform your doctor of these issues before taking flaxseed oil. Additionally, seek prompt care from your doctor if you develop bleeding problems, such as recurrent nosebleeds, while taking this supplement.
Side Effects of Deglycyrrhizinated Licorice
Flaxseed may mimic the effect of estrogen, a female sex hormone, MedlinePlus warns, which may negatively affect a fetus during development. Consequently, women who are pregnant or breast-feeding should avoid using flaxseed oil unless otherwise directed by a medical professional.
Flaxseed oil may lower the levels of sugar in your blood, MedlinePlus explains. If you have diabetes and take medication that lowers your blood sugar levels, talk with your doctor before using flaxseed oil. Concomitant use of blood sugar-lowering medications and flaxseed oil may cause your blood sugar levels to drop significantly, leading to a complication called hypoglycemia. Hypoglycemia may cause symptoms of dizziness, hunger, headache, fatigue and confusion.
- Flaxseed oil may lower the levels of sugar in your blood, MedlinePlus explains.
- Concomitant use of blood sugar-lowering medications and flaxseed oil may cause your blood sugar levels to drop significantly, leading to a complication called hypoglycemia.
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Side Effects of Deglycyrrhizinated Licorice
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- University of Maryland Medical Center: Flaxseed Oil: Precautions, Possible Interactions
- MedlinePlus: Flaxseed
- American Cancer Society: Flaxseed
- Goyal A, Sharma V, Upadhyay N, Gill S, Sihag M. Flax and flaxseed oil: an ancient medicine & modern functional food. J Food Sci Technol. 2014;51(9):1633-53. doi:10.1007/s13197-013-1247-9
- Ren GY, Chen CY, Chen GC, et al. Effect of flaxseed intervention on inflammatory marker C-reactive protein: A systematic review and meta-analysis of randomized controlled trials. Nutrients. 2016;8(3):136. doi:10.3390/nu8030136
- Okinyo-Owiti DP, Dong Q, Ling B, et al. Evaluating the cytotoxicity of flaxseed orbitides for potential cancer treatment. Toxicol Rep. 2015;2:1014-1018. doi:10.1016/j.toxrep.2015.06.011
- Lowcock EC, Cotterchio M, Boucher BA. Consumption of flaxseed, a rich source of lignans, is associated with reduced breast cancer risk. Cancer Causes Control. 2013;24(4):813-6. doi:10.1007/s10552-013-0155-7
- Ramos CI, Andrade de Lima AF, Grilli DG, Cuppari L. The short-term effects of olive oil and flaxseed oil for the treatment of constipation in hemodialysis patients. J Ren Nutr. 2015;25(1):50-6. doi:10.1053/j.jrn.2014.07.009
- Styrczewska M, Kostyn A, Kulma A, et al. Flax fiber hydrophobic extract inhibits human skin cells inflammation and causes remodeling of extracellular matrix and wound closure activation. Biomed Res Int. 2015;2015:862391. doi:10.1155/2015/862391
- Ibrügger S, Kristensen M, Mikkelsen MS, Astrup A. Flaxseed dietary fiber supplements for suppression of appetite and food intake. Appetite. 2012;58(2):490-5. doi:10.1016/j.appet.2011.12.024
- Cetisli NE, Saruhan A, Kivcak B. The effects of flaxseed on menopausal symptoms and quality of life. Holist Nurs Pract. 2015;29(3):151-7. doi:10.1097/HNP.0000000000000085
- National Center for Complementary and Integrative Health. Flaxseed and flaxseed oil. Updated September 2016.
- O'Keefe A, Kapur S, Rex G, Watson W. Flax seed allergy in children: an emerging allergen? Allergy Asthma Clin Immunol. 2010; 6(Suppl 2):P6. doi:10.1186/1710-1492-6-S2-P6
- Hackshaw-McGeagh LE, Perry RE, Leach VA, et al. A systematic review of dietary, nutritional, and physical activity interventions for the prevention of prostate cancer progression and mortality. Cancer Causes Control. 2015;26(11):1521-50. doi:10.1007/s10552-015-0659-4
- Carleton AJ, Sievenpiper JL, De Souza R, McKeown-Eyssen G, Jenkins DJ. Case-control and prospective studies of dietary α-linolenic acid intake and prostate cancer risk: a meta-analysis. BMJ Open. 2013;3(5). doi:10.1136/bmjopen-2012-002280
- Setayesh M, Sadeghifar AR, Nakhaee N, Kamalinejad M, Rezaeizadeh H. A topical gel from flax seed oil compared with hand splint in carpal tunnel syndrome: A randomized clinical trial. J Evid Based Complementary Altern Med. 2017;22(3):462-467. doi:10.1177/2156587216677822
- UW Medicine Anesthesiology and Pain Medicine. Medications to avoid before surgery.
- Mount Sinai Health Library. Flaxseed oil.
- Kajla P, Sharma A, Sood DR. Flaxseed--a potential functional food source. J Food Sci Technol. 2015;52(4):1857-71. doi:10.1007/s13197-014-1293-y
- Cockerell KM, Watkins AS, Reeves LB, Goddard L, Lomer MC. Effects of linseeds on the symptoms of irritable bowel syndrome: a pilot randomised controlled trial. J Hum Nutr Diet. 2012;25(5):435-43. doi:10.1111/j.1365-277X.2012.01263.x
- Kaithwas G, Majumdar DK. Effect of L. usitatissimum (flaxseed/linseed) fixed oil against distinct phases of inflammation. ISRN Inflamm. 2013;2013:735158. doi:10.1155/2013/735158
- Ward HA, Kuhnle GG, Mulligan AA, Lentjes MA, Luben RN, Khaw KT. Breast, colorectal, and prostate cancer risk in the European Prospective Investigation into Cancer and Nutrition-Norfolk in relation to phytoestrogen intake derived from an improved database. Am J Clin Nutr. 2010;91(2):440-8. doi:10.3945/ajcn.2009.28282
Rae Uddin has worked as a freelance writer and editor since 2004. She specializes in scientific journalism and medical and technical writing. Her work has appeared in various online publications. Uddin earned her Master of Science in integrated biomedical sciences with an emphasis in molecular and cellular biochemistry from the University of Kentucky College of Medicine.