Cooking Oils and Dietary Fats in Viet Nam: What Matters for Health and Everyday Cooking
COOKING & CULINARY PRACTICEFOOD & NUTRITION SCIENCE
Category: Cooking & Culinary Practice
Secondary category: Food & Nutrition Science
Last reviewed: 28 September 2026
Fat is an essential part of both nutrition and cooking. It provides energy and essential fatty acids, helps the body absorb fat-soluble vitamins, carries flavor, changes texture and contributes to browning and other qualities that make food enjoyable. In Vietnamese diets, fat comes not only from cooking oil but also from fish, nuts, seeds, meat, eggs, dairy products, coconut, sauces, fried foods and many packaged products.
The useful question, therefore, is not whether fat is simply “good” or “bad.” It is what type of fat we are eating, how much we are using, what foods it comes from, what it replaces in the diet and how it is being cooked.
That distinction has become particularly relevant in Viet Nam. The 2026 Recommended Nutrient Intakes for Vietnamese People place greater emphasis on fat quality rather than focusing only on reducing total fat. For healthy adults, fat is recommended to provide around 20–25% of total dietary energy and not exceed 25%. The updated recommendations encourage foods rich in unsaturated fatty acids, including fish, nuts and vegetable oils, recommend 250 mg of EPA plus DHA per day for adults, and advise keeping trans fatty acids within 0–1% of total energy while preferentially replacing them with unsaturated fats.
Key Points
Dietary fat is necessary, but both quantity and quality matter. Viet Nam’s 2026 recommendations for healthy adults emphasize a total fat intake of around 20–25% of dietary energy together with greater attention to the types and sources of fat. Unsaturated fats generally make better replacements for foods rich in saturated and trans fats, rather than simply being added on top of an already energy-rich diet. There is no single “best cooking oil” for every Vietnamese kitchen. The appropriate choice also depends on the dish, cooking method, flavor, affordability, storage and overall dietary pattern. Frying involves more than the oil itself, because temperature, duration, repeated heating, the food being fried and oil absorption all matter. Smoke point should not be used as a health ranking of oils, and repeatedly heated frying oil deserves more attention than many online debates about individual oil varieties.
Why Has the Conversation About Fat Changed?
For many years, public nutrition messages often reduced dietary fat to a simple instruction: eat less of it. Current evidence supports a more nuanced approach.
The 2026 Vietnamese recommendations explicitly shift attention toward fat quality. In addition to the recommended range for total fat, they encourage foods rich in unsaturated fatty acids, provide updated omega-3 recommendations and emphasize reducing trans-fat intake. This moves the conversation away from treating all fats as nutritionally equivalent.
WHO takes a broadly similar approach internationally. Its current guidance says that the quality of dietary fat matters, that unsaturated fats are preferable to saturated and trans fats, and that adults should obtain no more than 10% of total energy from saturated fat and no more than 1% from trans fat. WHO recommends replacing saturated and trans fats with unsaturated fats or, in some circumstances, carbohydrates from foods naturally rich in dietary fiber.
The total-fat figures used in Vietnamese and WHO guidance are not identical. WHO states that adults generally need at least about 15% of dietary energy from fat and that limiting total fat to around 30% or less may help prevent unhealthy weight gain. Viet Nam’s 2026 recommendations use a more specific range of about 20–25% for healthy adults and advise not exceeding 25%. These documents are designed for somewhat different purposes and populations and should not be forced into one number. For general nutrition communication in Viet Nam, the current Vietnamese recommendations are the more relevant primary reference.
Unsaturated, Saturated and Trans Fats: What Is the Difference?
Most foods contain a mixture of different fatty acids rather than only one type.
Unsaturated fats include monounsaturated and polyunsaturated fatty acids. They are found in varying proportions in fish, nuts, seeds and many liquid plant oils, including soybean, canola, sunflower, peanut, rice-bran and olive oils. Replacing sources of saturated fat with unsaturated fats generally produces a more favorable cardiovascular risk profile, which is why both WHO and the Vietnamese recommendations emphasize this direction of substitution.
Saturated fats occur in higher proportions in foods such as fatty meats, butter, lard, coconut oil and palm oil. This does not mean that every food containing saturated fat must disappear from the diet. What matters more is how much is eaten over time and, importantly, what replaces saturated fat when intake is reduced.
Trans fatty acids can occur naturally in small amounts in meat and dairy products from ruminant animals, while industrially produced trans fats have historically been associated particularly with partially hydrogenated oils. WHO recommends keeping total trans-fat intake below 1% of dietary energy and has made the elimination of industrially produced trans fat from the food supply a major global public-health priority.
The practical lesson is therefore less about memorizing fatty-acid chemistry and more about replacement. Increasing unsaturated-fat sources while reducing some foods rich in saturated and trans fats is more meaningful than simply trying to make every meal “low fat.”
What Does This Mean for a Vietnamese Kitchen?
Vietnamese cooking can draw on a wide range of fats and oils. Depending on household preference, region, price and availability, these may include soybean, peanut, sesame, rice-bran, sunflower, canola, olive or blended vegetable oils. Pork fat or lard also has a traditional role in some dishes, while coconut products feature more prominently in certain regional cuisines.
There is no evidence-based reason to insist that every household use one particular oil. A practical kitchen might use a neutral liquid plant oil for routine cooking, a small amount of sesame oil primarily for flavor, and obtain additional unsaturated fats from fish, nuts and seeds.
The objective is not to build an expensive collection of “premium oils.” It is to create an overall eating pattern in which fats rich in unsaturated fatty acids increasingly replace excessive sources of saturated and trans fats rather than simply adding more total fat and energy.
The same thinking applies outside the home. The type of frying fat matters, but so do how long it is heated, how often it is reused, the temperature, the type of food being fried and how much fried food is eaten.
Is Vegetable Oil Automatically Healthier Than Animal Fat?
Not every vegetable oil is nutritionally identical, and not every animal fat has exactly the same fatty-acid composition. However, many liquid plant oils contain considerably more unsaturated fat and less saturated fat than butter, lard and other solid animal fats. Replacing some saturated-fat sources with oils richer in mono- or polyunsaturated fats is consistent with current Vietnamese and WHO guidance.
This does not mean that a small amount of pork fat makes an otherwise balanced meal unhealthy. Nor does an unlimited amount of vegetable oil become beneficial simply because it comes from plants. Fat provides about 9 kcal per gram, making it energy-dense regardless of source.
The question “plant oil or animal fat?” is therefore too narrow. More useful questions are: What type of fatty acids predominate? How much is being used? What is this fat replacing? How often is it eaten? And what does the rest of the dietary pattern look like?
What About Coconut and Palm Oils?
Coconut and palm oils come from plants, but their fatty-acid profiles differ substantially from oils such as soybean, canola or olive oil. Both are relatively rich in saturated fatty acids, particularly coconut oil.
WHO identifies coconut and palm oils among important sources of saturated fat and recommends replacing saturated fat, where practical, with unsaturated fats.
A 2024 umbrella review of 48 reviews containing 206 meta-analyses found generally more favorable effects on total and LDL cholesterol for several oils richer in monounsaturated and polyunsaturated fats, including canola, virgin olive and rice-bran oils. Oils richer in saturated fat, including coconut oil and some palm-oil comparisons, tended to show less favorable LDL-cholesterol effects. Importantly, however, the certainty of evidence varied considerably across outcomes, ranging from moderate to very low.
This does not make coconut a forbidden food. Coconut and coconut milk have established roles in Vietnamese cooking, particularly in some regional dishes. The evidence simply does not support treating coconut oil as a uniquely heart-protective replacement for oils richer in unsaturated fats.
What About “Seed Oils”?
“Seed oils” has become a popular term online, but it is not a particularly useful nutritional category. It can include oils with quite different fatty-acid profiles and culinary properties, such as soybean, sunflower, sesame, corn and canola oils.
Current major dietary guidance does not treat these oils as a single harmful category. WHO specifically lists sunflower, soybean and canola oils among sources of unsaturated fat that are generally preferable to fats richer in saturated fatty acids.
Human clinical evidence also does not justify a blanket claim that all seed oils are inherently inflammatory or toxic. A 2025 systematic review of clinical studies in people with diabetes or dyslipidemia reported potentially favorable effects of several seed-derived oils on lipid, glycemic and some inflammatory or oxidative markers, while also emphasizing inconsistencies and limitations in the available studies. Because that review involved selected clinical populations, it should not be generalized into a claim that every seed oil has the same health effect in every population.
A better approach is to consider the specific oil’s fatty-acid composition, the amount used, how it is processed and stored, the cooking technique and what the oil replaces in the overall diet. A modest amount of oil used to stir-fry vegetables is also a very different dietary exposure from regularly eating large portions of deep-fried foods.
How Much Oil Should Go Into the Pan?
There is no universal spoon-count that works for every dish or every person.
Oil used to coat a wok for a quick stir-fry, oil added to a dressing and oil used for deep-frying serve different culinary purposes. Some oil remains in the cookware, some becomes part of the food, and the amount absorbed varies according to the food and cooking method.
The Vietnamese recommendation of 20–25% of dietary energy refers to total dietary fat, not just cooking oil. Fat already present in fish, meat, eggs, dairy foods, nuts, seeds, sauces and packaged foods also contributes to total intake.
This is why a statement such as “everyone should use two tablespoons of oil per day” can be misleading when presented as a universal rule. Needs vary according to energy requirements, age, physiological state and health status. For everyday cooking, a more sensible principle is to use enough oil to achieve the intended culinary result without automatically adding more than the dish needs.
Frying Is More Than a Question of Which Oil You Choose
Frying creates flavor, aroma, browning and texture that are difficult to reproduce exactly with other methods, and fried dishes are part of many culinary traditions. The nutritional question is therefore not whether frying has to disappear completely.
During frying, especially deep-frying, oil is exposed to high temperature, oxygen and water released from food. Thermoxidation and polymerization occur, with hydrolysis also contributing to deterioration. The extent of these changes depends on the oil’s fatty-acid composition and minor components, the frying temperature and duration, the food being fried and whether the oil undergoes repeated heating and cooling. Food can also absorb part of the frying oil, increasing its energy density.
WHO recommends using methods such as steaming or boiling more often instead of relying heavily on frying as part of an overall healthy dietary pattern. This does not mean that a quick stir-fry is nutritionally equivalent to repeated deep-frying. The amount of oil, temperature, cooking time and oil absorption are very different.
Should We Choose an Oil by Its Smoke Point?
Smoke point is useful information, but it has acquired more importance in online nutrition discussions than the science supports.
Smoke point is the temperature at which visible smoke begins to appear. It is influenced particularly by free fatty acids and oil refining, among other factors. However, contemporary food-science reviews emphasize that smoke point is not a precise indicator of an oil’s susceptibility to degradation or of how much degradation is occurring during frying.
Thermal stability depends on more than one number. Fatty-acid composition, antioxidants and other minor compounds, refining, temperature, time, oxygen exposure and repeated heating all matter.
An oil should therefore not be called “healthy” simply because it has a high smoke point. Nor should an oil automatically be considered unsuitable for cooking because another oil has a higher one. In everyday practice, choose an oil suitable for the cooking technique, avoid unnecessarily extreme heat and do not routinely allow oil to smoke heavily.
What About Reusing Frying Oil?
This deserves at least as much attention as debates about which bottle of oil to buy.
Prolonged heating and repeated use increase chemical degradation. Reviews describe increases in oxidation and polymerization products, free fatty acids, viscosity, darkening and foaming during repeated or prolonged frying, although the rate and nature of deterioration differ considerably according to the oil and frying conditions.
For home cooking, routinely reheating the same batch of oil through many cycles is not a good practice. Darkening, thickening, persistent foaming or unpleasant or rancid odors are practical warning signs that the oil has deteriorated, but their absence does not prove that repeatedly heated oil remains chemically unchanged. Simply topping up heavily used oil with fresh oil does not return the entire mixture to its original state.
The more useful long-term strategy is to avoid making deep-frying the default cooking method and to use fresh, appropriately stored oil when frying is chosen.
Does Refining Make an Oil “Bad”?
Refining does not automatically make an oil nutritionally poor or unsafe. It can remove free fatty acids, pigments, odors and other unwanted components and produce an oil with neutral flavor and consistent technological properties. At the same time, depending on the process and oil, refining can reduce some naturally occurring minor compounds such as polyphenols and other antioxidants.
Virgin or cold-pressed oils may retain more characteristic flavor and some bioactive compounds, but “cold pressed” is not a universal marker of superior health value for every culinary use. Likewise, “refined” does not mean nutritionally empty.
The appropriate choice depends on the specific oil, cooking method, desired flavor, storage conditions, price and the rest of the diet. Dividing oils into simple “natural good, processed bad” categories does not reflect how food science actually works.
What About Olive Oil?
Olive oil is rich in monounsaturated fat and is well established as one source of unsaturated fat within healthy dietary patterns. It does not, however, need to become the default cooking oil in every Vietnamese kitchen.
The common claim that olive oil can only be used cold is also too simplistic. Food-science evidence indicates that olive oils, including virgin olive oil, can perform well during cooking and frying under appropriate conditions. Their behavior reflects fatty-acid composition and antioxidant compounds as well as cooking conditions, not smoke point alone.
Olive oil is also often more expensive in Viet Nam, and its flavor may not suit every dish. A nutritionally sound Vietnamese diet does not depend on importing a Mediterranean ingredient when locally available oils rich in unsaturated fats can fit the recipe, budget and cooking method.
The nutritional principle is broader than any one oil.
Look Beyond the Bottle: Whole Foods Are Important Fat Sources Too
Cooking oil is only one source of dietary fat. Fish supplies unsaturated fats and, in some species, the long-chain omega-3 fatty acids EPA and DHA. Nuts and seeds provide unsaturated fats together with protein, fiber, vitamins and minerals. Soy foods contribute both protein and fat, while eggs, meat and dairy products contain varying mixtures of saturated and unsaturated fatty acids.
Viet Nam’s 2026 recommendations specifically encourage foods rich in unsaturated fats such as fish, nuts and vegetable oils and recommend approximately 250 mg/day of EPA plus DHA for adults.
This shifts the conversation from simply asking “Which oil should I buy?” toward a more useful question: Where are the fats in my overall diet coming from?
How Can Food Labels Help?
For prepackaged foods within the scope of Circular No. 30/2026/TT-BYT, total fat is one of the basic nutrition components generally required to be declared, subject to the applicable exemptions. Foods processed by frying must additionally declare saturated fat, again subject to the conditions and thresholds specified in the Circular. The regulation uses dietary reference values of 56 g for total fat and 20 g for saturated fat for nutrition-labeling purposes.
These figures are labeling references, not individualized dietary prescriptions.
It is also important to understand what the current mandatory declaration may not show. Trans fat is not one of the basic nutrients that Circular No. 30/2026 requires to be declared across foods within its scope. The absence of a trans-fat line on a Vietnamese food label should therefore not be interpreted as proof that the food contains zero trans fat.
The ingredient list may provide additional context. Where an ingredient such as partially hydrogenated oil is listed, this is relevant because partially hydrogenated oils have historically been a major source of industrially produced trans fatty acids. WHO recommends their elimination from the food supply.
Viet Nam’s Regulatory Context Is Also Changing
An important regulatory change has already been promulgated, but it is not yet in force as of 28 September 2026.
On 26 February 2026, the Ministry of Industry and Trade issued Circular No. 10/2026/TT-BCT, promulgating QCVN 29:2026/BCT, the National Technical Regulation for Refined Vegetable Oils. The Circular is scheduled to take effect on 1 December 2026.
Among its requirements, QCVN 29:2026/BCT sets a trans-fatty-acid limit of no more than 2 g per 100 g of fat in refined vegetable oils. It also establishes limits for several contaminants and process-related compounds, including 3-MCPD and its fatty-acid esters, glycidyl esters and polycyclic aromatic hydrocarbons, as well as a limit for erucic acid in refined rapeseed oil.
The numerical trans-fat threshold resembles WHO’s best-practice limit of 2 g of industrially produced trans fat per 100 g of total fat, but the regulatory scopes are not the same. WHO’s best-practice policies refer to a national limit covering all foods or a national prohibition of partially hydrogenated oils. QCVN 29:2026/BCT applies specifically to refined vegetable oils. It should therefore not be described as a comprehensive Vietnamese ban on industrial trans fat throughout the entire food supply.
That distinction is important both scientifically and legally.
What Matters More Than Finding the “Perfect Oil”?
A great deal of nutrition content is organized around finding one perfect cooking oil. For most households, that is unnecessary.
A more useful approach is to consider four things together: the type of fat, the amount used, the cooking method and the overall meal.
An oil rich in unsaturated fats is generally a sensible routine choice when it replaces a fat richer in saturated fatty acids. But adding large quantities of any oil to every dish does not become beneficial simply because its fatty-acid profile is favorable. Likewise, a modest amount of lard in a traditional dish does not determine the nutritional quality of the entire diet.
Cooking context also matters. A vegetable stir-fry prepared with a modest amount of oil, a grilled fish containing its naturally occurring fats and a repeatedly deep-fried packaged food represent very different dietary exposures.
The pattern matters more than one ingredient.
A Practical Way to Think About Cooking Fats
For routine cooking, begin with fat quality. Oils richer in unsaturated fatty acids generally make better everyday choices when they replace fats richer in saturated or trans fatty acids.
Then think about the dish. Choose an oil whose flavor and cooking properties fit what you are preparing. A Vietnamese kitchen does not need to use one oil for every purpose.
Use enough oil to achieve the culinary result rather than pouring it automatically. If deep-fried foods already appear frequently elsewhere in the diet, consider steaming, boiling, braising, grilling, stir-frying with a modest amount of oil or other techniques more often.
Avoid routinely overheating or repeatedly reusing frying oil. Store oils away from excessive heat and light and keep containers properly closed, because oxidation can also occur during storage.
Finally, remember that some of the most useful dietary fats do not come from an oil bottle at all. Fish, nuts, seeds and other whole foods can provide unsaturated fats together with nutrients that refined cooking oils do not provide.
When Individual Advice Matters
The recommendations discussed here are intended primarily for generally healthy populations. Individual dietary needs can differ according to health status, energy requirements and therapeutic goals.
People with medical conditions that affect lipid metabolism, fat digestion, energy requirements or therapeutic nutrition may need an individualized approach. This can include some people with cardiovascular or metabolic disease, malabsorption, pancreatic or biliary disorders, or other conditions requiring specialized nutrition management.
The National Institute of Nutrition specifically notes that the 2026 Recommended Nutrient Intakes were developed for healthy populations and that people with disease, metabolic disorders, malnutrition, overweight, obesity or other therapeutic nutrition needs may require individualized assessment by appropriate healthcare or nutrition professionals.
From “Which Oil Is Best?” to Better Everyday Cooking
The question “Which cooking oil is healthiest?” sounds straightforward, but it often produces answers that are more confident than the evidence allows.
A more useful question is: What source of fat fits this food, this cooking method and this overall dietary pattern?
For everyday Vietnamese cooking, the current evidence points in a relatively clear direction. Favor foods and oils rich in unsaturated fats when they replace sources richer in saturated or trans fats. Keep total fat appropriate to overall energy needs. Do not make deep-frying the default cooking method. Avoid routinely overheating or repeatedly reusing frying oil. And judge the overall meal rather than treating one oil as either a cure or a toxin.
None of this requires Vietnamese cooking to abandon pork fat completely, use olive oil in every dish or fear commonly used seed oils. It asks for something more practical: understand what different fats contribute, use them intentionally, and let cooking technique serve both flavor and health.
That is where culinary medicine can add value between nutrition science and the everyday kitchen.
References
National Institute of Nutrition, Viet Nam. Những điểm cập nhật về nhu cầu dinh dưỡng khuyến nghị cho người Việt Nam [Updates to the Recommended Nutrient Intakes for Vietnamese People]. 3 August 2026. Viện Dinh Dưỡng Quốc Gia
World Health Organization. Healthy diet. Updated 26 January 2026. World Health Organization
World Health Organization. Saturated fatty acid and trans-fatty acid intake for adults and children: WHO guideline. 2023.
World Health Organization. Total fat intake for the prevention of unhealthy weight gain in adults and children: WHO guideline. 2023.
Voon PT, Ng CM, Ng YT, Wong YJ, Yap SY, Leong SL, Yong XS, Lee SWH. Health Effects of Various Edible Vegetable Oil: An Umbrella Review. Advances in Nutrition. 2024;15(9):100276. doi:10.1016/j.advnut.2024.100276. PubMed
Abrante-Pascual S, Nieva-Echevarría B, Goicoechea-Oses E. Vegetable Oils and Their Use for Frying: A Review of Their Compositional Differences and Degradation. Foods. 2024;13(24):4186. doi:10.3390/foods13244186. PubMed Central (PMC)
Fornari Laurindo L, et al. Evaluating the effects of seed oils on lipid profile, inflammatory and oxidative markers, and glycemic control of diabetic and dyslipidemic patients: a systematic review of clinical studies. Frontiers in Nutrition. 2025;12:1502815. doi:10.3389/fnut.2025.1502815. Frontiers
World Health Organization. Trans fat. Updated 24 January 2024. World Health Organization
Ministry of Health of Viet Nam. Circular No. 30/2026/TT-BYT dated 9 July 2026 on the content and presentation of nutrition information on food labels. Effective 10 July 2026.
Ministry of Industry and Trade of Viet Nam. Circular No. 10/2026/TT-BCT dated 26 February 2026, promulgating QCVN 29:2026/BCT, National Technical Regulation for Refined Vegetable Oils. Effective 1 December 2026. Van Ban Chinh Phu
QCVN 29:2026/BCT. National Technical Regulation for Refined Vegetable Oils. Includes a TFA limit of ≤2 g/100 g fat and specified contaminant limits for refined vegetable oils. THƯ VIỆN PHÁP LUẬT
Disclaimer
This article is intended for general educational and informational purposes only. It summarizes current nutrition guidance, scientific evidence and selected Vietnamese regulatory developments related to dietary fats and cooking oils. It does not provide individualized medical, nutrition, food-safety, regulatory or legal advice.
The dietary ranges discussed here are population-level recommendations. Individual fat and energy needs may differ according to age, physiological status, physical activity, health status and therapeutic requirements. People with medical conditions requiring specialized nutrition management should seek individualized advice from suitably qualified and, where required, appropriately authorized healthcare or nutrition professionals.
The discussion of frying, cooking temperatures and oil reuse is intended as general food-literacy guidance. Oil deterioration depends on the specific oil, food, temperature, duration, equipment, storage conditions and number of heating cycles. Appearance, foaming, texture or odor can provide practical warning signs of deterioration, but they cannot establish the chemical safety of used frying oil.
As of 28 September 2026, QCVN 29:2026/BCT on refined vegetable oils has been promulgated but is not yet in force. Circular No. 10/2026/TT-BCT provides that it will take effect on 1 December 2026. The regulation applies specifically to refined vegetable oils and should not be interpreted as a comprehensive national prohibition of industrially produced trans fat across all foods in Viet Nam.
Scientific evidence, nutrition recommendations and Vietnamese regulatory requirements may change over time. Culinary Medicine Vietnam aims to review and update this resource as relevant evidence, national guidance and regulatory developments evolve.