The Best Fats To Include In Your Keto Diet

The Best Fats To Include In Your Keto Diet

With so many dietary fats to choose from... which ones are the right ones for keto? We explore the best fats to include in your keto diet to get the most out of your lifestyle.

The Best Fats for a Keto Diet

Getting enough fat is a central component of the ketogenic diet. By significantly reducing carbohydrate intake and replacing it with fat your body can then shift into a metabolic state known as ketosis. This has been shown to help with weight loss, reduce insulin and blood sugar levels, improve metabolic wellbeing, and support healthy brain function.

But this doesn’t mean that you should dive in and eat any fat that you come across. There are some fats that are simply bad for you, causing inflammation and increasing the risk for cardiovascular disease and other chronic illnesses like type 2 diabetes. These fats include artificial trans fats, highly processed fats, such as blended vegetable oils and margarine, deep-fried foods, and excessive amounts of omega-6 oils.

The good news is there are plenty of healthy fats to choose from that are both keto friendly and packed with nutrition. Here is a list of eight of the best sources of fat you can choose when going on a keto diet.

Avocado and avocado oil

The health benefits of avocados have long been celebrated because of their nutrient-rich profile and therapeutic value. Native to Mexico and Central America, these fruits are abundant in prebiotic fibre, phytonutrients, antioxidants, magnesium, potassium, and vitamins including, β-carotene, vitamins A, C & E, B2, B3, B5, B6 and folic acid.

Perhaps the most notable feature of avocado is its high level of healthy, nutritious fats. A 100 g serving of avocado provides 15 grams of fat, most of which is made up of beneficial monounsaturated fat. And with nearly no carbohydrates, this makes avocado one of the most keto-friendly foods on the planet.

Avocados are a greater source of potassium than bananas. In fact, one avocado contains up to 1,000 mg of potassium. They also contain good quantities of magnesium. So, if you’re looking to maintain your electrolyte levels and avoid the symptoms of keto flu, like cramping, constipation, fatigue, lightheadedness, and headaches, you’ll want to include avocado into your daily keto menu.

You should also consider adding avocado oil to your keto shopping list. While it's not as popular as other plant-based oils, it has a delicious neutral, buttery taste and, with a smoke point of 271 C, is one of the most heat-stable vegetable oils for cooking (1), (2), (3).

Flaxseed and flaxseed oil

Nuts and seeds are a common staple in a ketogenic diet due to their nutrient-packed, high fat, low carb content. However, they can be very moreish, and you can very quickly find yourself overdoing it with these as snacks. The risk is you’ll end up eating more calories than your body needs which will then get stored as fat, even if you’re in ketosis. 

This isn’t the case with flaxseeds. These small golden-brown seeds are a nutrient powerhouse loaded with fibre, vitamins, minerals, antioxidants, and omega-3 fatty acids. Given you only need a small amount added to some yoghurt, a keto-smoothie or keto granola, you can enjoy all the benefits without exceeding your daily limit.

If you’re on keto, one of the most desirable features of flaxseed is its high fibre content. When you significantly reduce your carbohydrate consumption you might also be eliminating some of the more commonly consumed sources of fibre. Adding 2 tablespoons of flaxseed makes up for this in spades, providing about 6 grams of fibre made up of 20–40% soluble fibre (mucilage gums) and 60–80% insoluble fibre (cellulose and lignin). This not only promotes regularity and prevents constipation but also helps regulate blood sugar and cholesterol levels. Furthermore, as a prebiotic, flaxseed feeds beneficial gut bacteria to support gut health (4), (5), (6)

Make sure to get your flaxseed in ground form. Otherwise, the seeds will pass straight through you undigested. You can also freshly grind flaxseeds in a coffee grinder and simply add them to the recipe of your choice.

For those wanting to get the most out of flaxseed’s impressive fatty acid content, you may want to try flaxseed oil. With its mild, nutty, sweet flavour, flaxseed oil is one of the most concentrated sources of omega-3 in the form of alpha-linolenic acid (ALA), as well as other polyunsaturated and monounsaturated fats. This not only makes flaxseed oil a wonderful source of fat for generating ketones, but the ALA content is responsible for numerous health benefits including as an antioxidant and anti-inflammatory, supporting cardiovascular, metabolic, and gut health. (7), (8), (9), (10), (11), (12)

Coconut oil

Coconut oil may have gotten a bad rap in the past because it is so high in saturated fat but, in light of recent research, our view of this has changed substantially. It turns out that carbohydrates contribute to obesity and heart disease more than we ever realised and saturated fat is a key nutrient that can provide a plentiful source of energy. This makes coconut oil ideal for inclusion in a keto diet.

Coconut oil differs from other sources of fat and cooking oils in that it is a rich source of medium-chain triglycerides (MCTs). These MCTs make up about 65% of coconut oil, with lauric acid being the most abundant at about 50% of total fats.

It’s the lauric acid content of coconut oil that plays a significant role in delivering many of the health benefits of coconut oil, including its antibacterial, antiviral, and antifungal properties. This anti-microbial action against a variety of harmful microorganisms also helps activate its anti-inflammatory activity. (13), (14)

The MCTs found in coconut oil are quickly broken down in the body to produce ketones. These ketones provide a rapid source of energy that can contribute to thermogenesis and fat burning. (15), (16)

MCT oil

Medium-chain triglycerides (MCTs) are a type of fat found in foods like coconut oil. Given that they have a much smaller structure than long-chain triglycerides they are more readily absorbed by the body and are efficiently used for energy.

When we absorb MCTs they go straight to the liver, where they are used as an instant source of energy or turned into ketones. And those ketones are an excellent alternative fuel source for organs that normally rely on carbohydrates.

And, because MCTs can be converted into ketones, especially when we reduce our carbohydrate intake, this helps those on a keto diet get into ketosis (21).

For this reason, MCTs can assist with weight loss. They have also been shown to influence our feeling of fullness after we eat, meaning we end up eating less food (22).

MCT oil also seems to have benefits for the brain and mental performance. Whereas it was once thought that the brain exclusively relies on glucose for its energy needs, it turns out that ketones are a more efficient energy source. This in part may explain why some studies have shown that MCTs may improve brain function, cognition, and memory (17), (18), (19), (20).

Fatty fish and fish oil

Fatty fish, like salmon and sardines, are great keto foods. Apart from providing a good quantity of protein, they are one of the richest known sources of beneficial omega-3 fatty acids, which include EPA and DHA. A 180 g piece of wild salmon provides around 1,800 milligrams of omega-3 fatty acids.

These essential fatty acids perform a variety of essential roles in the body and most of us don’t get nearly enough.

DHA has been demonstrated to promote brain function and eye health, whereas EPA provides the body with impressive anti-inflammatory benefits. EPA has also been shown to assist with mood disorders, such as depression (23), (24). Together, both EPA and DHA have been shown to be beneficial in cardiovascular (25) and neurological conditions, fatty liver disease (26), autism (27) and even brain trauma (28).

The other type of essential fat is the Omega-6 fatty acids. While these are important, if we consume too much, they can have a pro-inflammatory effect on the body contributing to cardiovascular disease, stroke, and metabolic disorders (29). Therefore, to achieve the right biological balance, it’s critical that we get enough Omega-3 when we are on a ketogenic diet. This is because there is a tendency to increase our Omega-6 fats, which are found in plant oils. We need to aim for an Omega 6 to Omega 3 ratio of approximately 2:1 to strike the right balance.

If eating fatty fish is not for you, you might want to consider supplementing with fish oil capsules or liquid. This provides a convenient, therapeutic dose of EPA and DHA that you can take every day.


For anyone who is on a ketogenic diet, the chances are that eggs are on their list of staples. That’s because eggs have the perfect nutritional profile required to enter and maintain a state of ketosis. They are low in carbohydrates, high in protein and high in fats. Beyond this, they are packed with essential nutrients such as vitamins A, B2, B5, B12, D, and E, as well as choline, folate, iron, potassium, selenium and the antioxidants lutein and zeaxanthin.

Egg yolk is approximately 58% fat, and one large egg can provide 4.5 grams of fat. If you source your eggs from free-range, plant-fed hens they are more likely to be higher in Omega-3 fatty acids. They also contain 6 grams of protein and less than 1 gram of carbohydrates, thus matching very well with the macronutrients prescribed in a ketogenic diet.

Eggs are probably the most convenient and versatile keto-friendly food you can prepare. They are quick and easy to cook and can easily be used in meals and snacks.

If you keep your calorie count in check you can really eat as many eggs as you like. And if you’re worried about your cholesterol levels there are countless studies proving that eggs only increase HDL (good cholesterol). They rarely increase LDL (bad cholesterol) and if so, only very slightly. (30), (31), (32).

Olive oil

Given its popularity, it can be easy to forget just how nutritious olive oil is. And as a calorie-dense oil that is incredibly rich in monounsaturated fatty acids, olive oil is as keto-friendly as you can get.

There aren’t that many oils extracted from berries. Avocado is one (yes, avocado is considered a berry) and olive oil is another. Most other oils are derived from nuts and seeds. This gives olive oil a unique nutrient profile, dense in vitamins, antioxidants, phytosterols and polyphenols.

It's the dietary polyphenols in olive oil that help make it one of the healthiest oils you can consume. These compounds, along with vitamin E, play an important role in reducing inflammation, cardiovascular disease, and LDL cholesterol (33) (34) (35), (36).

Given the versatility of olive oil, incorporating it into a ketogenic diet is especially easy. Drizzle it over roasted cauliflower, add it to keto dips or use it in salad dressings, the only limit is your imagination.

Just make sure that you use extra virgin olive oil over standard olive oil. It’s made from the first pressing and is the least processed variety and highest quality of olive oil available.

Sacha inch oil

You would be forgiven for thinking that this unfamiliar-sounding oil is a newcomer to the stable of healthy oils. However, Sacha inchi is a crop originally planted in Peru by ancient pre-Inca cultures many centuries ago.

What makes sacha inchi so impressive is its very high omega-3 fatty acid content with alpha-linolenic acid making up about 45% of total fat. This makes it comparable to flaxseed oil (37).

This superfood is also very high in vitamin E, predominantly of gamma-Tocopherol and delta-Tocopherol, as well as phytosterols, and phenolic compounds.

All these characteristics make Sacha inchia oil a perfect consideration for a ketogenic diet.


  1. Dreher ML, Davenport AJ. Hass avocado composition and potential health effects. Crit Rev Food Sci Nutr. 2013;53(7):738-750. doi:10.1080/10408398.2011.556759
  2. Segovia-Siapco G, Paalani M, Oda K, Pribis P, Sabaté Associations between Avocado Consumption and Diet Quality, Dietary Intake, Measures of Obesity and Body Composition in Adolescents: The Teen Food and Development Study. Nutrients. 2021 Dec 15;13(12):4489. doi: 10.3390/nu13124489. PMID: 34960040; PMCID: PMC8708967.
  3. Fulgoni, V.L., Dreher, M. & Davenport, A.J. Avocado consumption is associated with better diet quality and nutrient intake, and lower metabolic syndrome risk in US adults: results from the National Health and Nutrition Examination Survey (NHANES) 2001–2008. Nutr J12, 1 (2013).
  4. Kristensen M, Jensen MG, Aarestrup J, Petersen KE, Søndergaard L, Mikkelsen MS, Astrup A. Flaxseed dietary fibers lower cholesterol and increase fecal fat excretion, but magnitude of effect depend on food type. Nutr Metab (Lond). 2012 Feb 3;9:8. doi: 10.1186/1743-7075-9-8. PMID: 22305169; PMCID: PMC3307491.
  5. Quigley EM. Gut bacteria in health and disease. Gastroenterol Hepatol (N Y). 2013 Sep;9(9):560-9. PMID: 24729765; PMCID: PMC3983973.
  6. Singh KK, Mridula D, Rehal J, Barnwal P. Flaxseed: a potential source of food, feed and fiber. Crit Rev Food Sci Nutr. 2011 Mar;51(3):210-22. doi: 10.1080/10408390903537241. PMID: 21390942.
  7. Weickert MO, Pfeiffer AF. Metabolic effects of dietary fiber consumption and prevention of diabetes. J Nutr. 2008 Mar;138(3):439-42. doi: 10.1093/jn/138.3.439. PMID: 18287346.
  8. Wanders AJ, van den Borne JJ, de Graaf C, Hulshof T, Jonathan MC, Kristensen M, Mars M, Schols HA, Feskens EJ. Effects of dietary fibre on subjective appetite, energy intake and body weight: a systematic review of randomized controlled trials. Obes Rev. 2011 Sep;12(9):724-39. doi: 10.1111/j.1467-789X.2011.00895.x. Epub 2011 Jun 16. PMID: 21676152.
  9. Holvoet P. Oxidized LDL and coronary heart disease. Acta Cardiol. 2004 Oct;59(5):479-84. doi: 10.2143/AC.59.5.2005219. PMID: 15529550.
  10. Kawakami Y, Yamanaka-Okumura H, Naniwa-Kuroki Y, Sakuma M, Taketani Y, Takeda E. Flaxseed oil intake reduces serum small dense low-density lipoprotein concentrations in Japanese men: a randomized, double blind, crossover study. Nutr J. 2015 Apr 21;14:39. doi: 10.1186/s12937-015-0023-2. PMID: 25896182; PMCID: PMC4409715.
  11. Patade A, Devareddy L, Lucas EA, Korlagunta K, Daggy BP, Arjmandi BH. Flaxseed reduces total and LDL cholesterol concentrations in Native American postmenopausal women. J Womens Health (Larchmt). 2008 Apr;17(3):355-66. doi: 10.1089/jwh.2007.0359. PMID: 18328014.
  12. Caligiuri SP, Edel AL, Aliani M, Pierce GN. Flaxseed for hypertension: implications for blood pressure regulation. Curr Hypertens Rep. 2014 Dec;16(12):499. doi: 10.1007/s11906-014-0499-8. PMID: 25342643.
  13. Cicero AF, Derosa G, Di Gregori V, Bove M, Gaddi AV, Borghi C. Omega 3 polyunsaturated fatty acids supplementation and blood pressure levels in hypertriglyceridemic patients with untreated normal-high blood pressure and with or without metabolic syndrome: a retrospective study. Clin Exp Hypertens. 2010 Jan;32(2):137-44. doi: 10.3109/10641960903254448. PMID: 20374188.
  14. Wallace TC. Health Effects of Coconut Oil-A Narrative Review of Current Evidence. J Am Coll Nutr. 2019 Feb;38(2):97-107. doi: 10.1080/07315724.2018.1497562. Epub 2018 Nov 5. PMID: 30395784.
  15. Joshi S, Kaushik V, Gode V, Mhaskar S. Coconut Oil and Immunity: What do we really know about it so far? J Assoc Physicians India. 2020 Jul;68(7):67-72. PMID: 32602684.
  16. Clegg ME, Golsorkhi M, Henry CJ. Combined medium-chain triglyceride and chilli feeding increases diet-induced thermogenesis in normal-weight humans. Eur J Nutr. 2013 Sep;52(6):1579-85. doi: 10.1007/s00394-012-0463-9. Epub 2012 Nov 20. PMID: 23179202.
  17. Assunção ML, Ferreira HS, dos Santos AF, Cabral CR Jr, Florêncio TM. Effects of dietary coconut oil on the biochemical and anthropometric profiles of women presenting abdominal obesity. Lipids. 2009 Jul;44(7):593-601. doi: 10.1007/s11745-009-3306-6. Epub 2009 May 13. PMID: 19437058.
  18. Reger MA, Henderson ST, Hale C, Cholerton B, Baker LD, Watson GS, Hyde K, Chapman D, Craft S. Effects of beta-hydroxybutyrate on cognition in memory-impaired adults. Neurobiol Aging. 2004 Mar;25(3):311-4. doi: 10.1016/S0197-4580(03)00087-3. PMID: 15123336.
  19. Jensen NJ, Wodschow HZ, Nilsson M, Rugby J. Effects of Ketone Bodies on Brain Metabolism and Function in Neurodegenerative Diseases. Int J Mol Sci. 2020 Nov 20;21(22):8767. doi: 10.3390/ijms21228767. PMID: 33233502; PMCID: PMC7699472.
  20. Croteau E, Castellano CA, Richard MA, Fortier M, Nugent S, Lepage M, Duchesne S, Whittingstall K, Turcotte ÉE, Bocti C, Fülöp T, Cunnane SC. Ketogenic Medium Chain Triglycerides Increase Brain Energy Metabolism in Alzheimer's Disease. J Alzheimers Dis. 2018;64(2):551-561. doi: 10.3233/JAD-180202. PMID: 29914035.
  21. Courchesne-Loyer A, Fortier M, Tremblay-Mercier J, Chouinard-Watkins R, Roy M, Nugent S, Castellano CA, Cunnane SC. Stimulation of mild, sustained ketonemia by medium-chain triacylglycerols in healthy humans: estimated potential contribution to brain energy metabolism. Nutrition. 2013 Apr;29(4):635-40. doi: 10.1016/j.nut.2012.09.009. Epub 2012 Dec 28. PMID: 23274095.
  22. D C Harvey CJ, Schofield GM, Williden M, McQuillan JA. The Effect of Medium Chain Triglycerides on Time to Nutritional Ketosis and Symptoms of Keto-Induction in Healthy Adults: A Randomised Controlled Clinical Trial. J Nutr Metab. 2018 May 22;2018:2630565. doi: 10.1155/2018/2630565. PMID: 29951312; PMCID: PMC5987302.
  23. Maher, Tyler & Sampson, Alistair & Goslawska, Magdalena & Pangua Irigaray, Cristina & Shafat, Amir & Clegg, Miriam. (2019). Food Intake and Satiety Response after Medium-Chain Triglycerides Ingested as Solid or Liquid. Nutrients. 11. 1638. 10.3390/nu11071638.
  24. Martins JG. EPA but not DHA appears to be responsible for the efficacy of omega-3 long chain polyunsaturated fatty acid supplementation in depression: evidence from a meta-analysis of randomized controlled trials. J Am Coll Nutr. 2009 Oct;28(5):525-42. doi: 10.1080/07315724.2009.10719785. PMID: 20439549.
  25. Liao Y, Xie B, Zhang H, He Q, Guo L, Subramanieapillai M, Fan B, Lu C, McIntyre RS. Efficacy of omega-3 PUFAs in depression: A meta-analysis. Transl Psychiatry. 2019 Aug 5;9(1):190. doi: 10.1038/s41398-019-0515-5. Erratum in: Transl Psychiatry. 2021 Sep 7;11(1):465. PMID: 31383846; PMCID: PMC6683166.
  26. Swanson D, Block R, Mousa SA. Omega-3 fatty acids EPA and DHA: health benefits throughout life. Adv Nutr. 2012 Jan;3(1):1-7. doi: 10.3945/an.111.000893. Epub 2012 Jan 5. PMID: 22332096; PMCID: PMC3262608.
  27. Tobin D, Brevik-Andersen M, Qin Y, Innes JK, Calder PC. Evaluation of a High Concentrate Omega-3 for Correcting the Omega-3 Fatty Acid Nutritional Deficiency in Non-Alcoholic Fatty Liver Disease (CONDIN). Nutrients. 2018 Aug 20;10(8):1126. doi: 10.3390/nu10081126. PMID: 30127297; PMCID: PMC6115838.
  28. Infante M, Sears B, Rizzo AM, Mariani Cerati D, Caprio M, Ricordi C, Fabbri A. Omega-3 PUFAs and vitamin D co-supplementation as a safe-effective therapeutic approach for core symptoms of autism spectrum disorder: case report and literature review. Nutr Neurosci. 2020 Oct;23(10):779-790. doi: 10.1080/1028415X.2018.1557385. Epub 2018 Dec 13. PMID: 30545280.
  29. Mayurasakorn K, Williams JJ, Ten VS, Deckelbaum RJ. Docosahexaenoic acid: brain accretion and roles in neuroprotection after brain hypoxia and ischemia. Curr Opin Clin Nutr Metab Care. 2011;14(2):158-167. doi:10.1097/MCO.0b013e328342cba5
  30. Innes JK, Calder PC. Omega-6 fatty acids and inflammation. Prostaglandins Leukot Essent Fatty Acids. 2018 May;132:41-48. doi: 10.1016/j.plefa.2018.03.004. Epub 2018 Mar 22. PMID: 29610056.
  31. Mutungi G, Ratliff J, Puglisi M, Torres-Gonzalez M, Vaishnav U, Leite JO, Quann E, Volek JS, Fernandez ML. Dietary cholesterol from eggs increases plasma HDL cholesterol in overweight men consuming a carbohydrate-restricted diet. J Nutr. 2008 Feb;138(2):272-6. doi: 10.1093/jn/138.2.272. PMID: 18203890.
  32. Andersen, C.J., Blesso, C.N., Lee, al. Egg Consumption Modulates HDL Lipid Composition and Increases the Cholesterol-Accepting Capacity of Serum in Metabolic Syndrome. Lipids 48, 557–567 (2013).
  33. Sugano M, Matsuoka R. Nutritional Viewpoints on Eggs and Cholesterol. Foods. 2021; 10(3):494.
  34. Guasch-Ferré M, Hu FB, Martínez-González MA, et al. Olive oil intake and risk of cardiovascular disease and mortality in the PREDIMED Study. BMC Med. 2014;12:78. Published 2014 May 13. doi:10.1186/1741-7015-12-78
  35. Santangelo C, Vari R, Scazzocchio B, De Sanctis P, Giovannini C, D'Archivio M, Masella R. Anti-inflammatory Activity of Extra Virgin Olive Oil Polyphenols: Which Role in the Prevention and Treatment of Immune-Mediated Inflammatory Diseases? Endocr Metab Immune Disord Drug Targets. 2018;18(1):36-50. doi: 10.2174/1871530317666171114114321. PMID: 29141574.
  36. Fernandes J, Fialho M, Santos R, Peixoto-Plácido C, Madeira T, Sousa-Santos N, Virgolino A, Santos O, Vaz Carneiro A. Is olive oil good for you? A systematic review and meta-analysis on anti-inflammatory benefits from regular dietary intake. Nutrition. 2020 Jan;69:110559. doi: 10.1016/j.nut.2019.110559. Epub 2019 Jul 25. PMID: 31539817.
  37. Hernáez Á, Remaley AT, Farràs M, Fernández-Castillejo S, Subirana I, Schröder H, Fernández-Mampel M, Muñoz-Aguayo D, Sampson M, Solà R, Farré M, de la Torre R, López-Sabater MC, Nyyssönen K, Zunft HJ, Covas MI, Fitó M. Olive Oil Polyphenols Decrease LDL Concentrations and LDL Atherogenicity in Men in a Randomized Controlled Trial. J Nutr. 2015

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Danny Urbinder

Danny Urbinder is a qualified naturopath and lecturer. He has been passionate about complementary and integrative medicine for over 25 years.

As a qualified naturopath who graduated from the Southern School of Natural Medicine, Danny lectured in Nutritional Biochemistry at the Australian College of Natural Medicine for many years. He also worked in functional pathology at Australian Reference Laboratories as Technical Services and State Manager.

For 15 years, since 2005, Danny worked at BioCeuticals as Director of Education and Director of Clinical Services. In 2012 he created and headed up FX Medicine, an online education platform bringing together education, research news and stories, to provide a high-quality reference source for those seeking evidence-based information on complementary and integrative medicine.