Groundnut oil, commonly known as "moongfali ka tel" in North India and kadalai ennai in the South, has been a staple of Indian cuisine for ages. From frying crispy pakoras to making masala dosa to frying dals, this groundnut oil is the most favourite option in every Indian household.
However, with the market flooded with different brands, oil adulteration has become a serious concern among people. To save money, some dishonest manufacturers mix pure groundnut oil with cheap, unhealthy oils such as palmolein oil, cottonseed oil, or even dangerous mineral oils.
How will you be certain that the bottle you are selecting from your local kirana store or supermarket is 100% pure? You don't need to have a huge science degree to check that. Below is a straightforward guide to help you recognise genuine, pure groundnut oil both in the market and at home.
Refined vs. Cold-Pressed Groundnut Oil: Know the Difference
Understanding the two kinds of groundnut oil before checking for purity will help you to sort out the purity level of the groundnut oil at the very basic stage.
- Refined groundnut oil: It is obtained from the seeds, which are first washed and then crushed at high temperature or using chemical solvents. In this way, the colour and smell are usually removed. It becomes very light as well.
- Cold-Pressed / Wood-Pressed Groundnut Oil (Kachi Ghani): It is traditionally made with wooden crushers (ghani), and the method is done without adding heat and chemicals. The natural vitamins are totally preserved, the color is a deep golden, and the fragrance is the smell of a roasted peanut. Basically, you can understand the purity from the very first use of it.
Looking for a healthy cooking oil for your little ones? Read our guide on Is Groundnut Oil Safe for Kids? to understand its nutritional benefits and everyday uses.
4 Easy Ways to Identify Pure Groundnut Oil While Shopping
If you are standing on a crowded market aisle and want to check the quality of an oil bottle, it may not be possible. You can simply use your eyes to observe the packaging to decide very quickly whether the product is high quality or not.
1. Identify the True Colour
Hold the bottle up to the supermarket lights. Naturally, a pure, unrefined groundnut oil will show a clear, deep golden-yellow to a straw-like colour. Sometimes it will be slightly cloudy at the bottom, which is really a good sign that the oil is pure and full of nutrients. Though if the oil you see in the bottle looks totally transparent, water-like, or even has a reddish-brown strange colouration, it may be highly processed, or it could be mixed with cheap seed oils.
2. Read the Back Label with Extra Care
Read the label thoroughly at the bottom or the side of the bottle that gives a list of ingredients for pure oil, such as groundnut oil or 100% peanut oil. Be careful in selecting the product that contains 'Permitted Antioxidants', 'Added Flavours', or a list of vegetable oils in the fine print. Stay away from these.
3. Find Quality Certifications to be Certain
Do not buy loose or unbranded oils that come without a name. A proper quality oil can be identified via the logo(s) of the standard Indian regulations printed on the wrapper. A branded oil bottle will, without fail, display the FSSAI (Food Safety and Standards Authority of India) logo with a valid license number. Also, you can rely on the presence of AGMARK Certification as it will vouch for the agricultural purity of the oil.
4. Keep an eye out for the Price Tag
We all like to find some really great deal that gives us the most for our money, but purity has a cost. Actually, pure groundnut oil is made out of a very large quantity of actual peanuts. Because of this, producing it at such a low cost is quite impossible. So, if there is a brand selling its oil at quite a bit lower price compared with the regular one you buy from the regular market, the chances are high that you are being sold a combined or even a counterfeit product.
Read our guide to understand the connection between groundnut oil and heart health and Can Groundnut Oil Lower Bad Cholesterol?
Quick Comparison: Pure vs. Adulterated Groundnut Oil
Here is a quick reference table to help you spot the differences between a genuine bottle and a suspicious one at a glance:
| Physical Feature | Pure Groundnut Oil (Cold-Pressed) | Adulterated / Cheaply Blended Oil |
| Color | Deep golden yellow, slightly thick or cloudy | Transparent, water-like, or reddish-brown tint |
| Aroma | Distinct, warm fragrance of roasted peanuts | Chemical-like smell, foul odour, or entirely scentless |
| Texture on Skin | Smooth, rich, and absorbs naturally after rubbing | Extremely sticky, heavy, or leaves a synthetic film |
| When Heated | Burns quietly and fills the kitchen with a nutty aroma | Crackles loudly, pops, and produces thick, choking smoke |
Simple Purity Tests of Groundnut Oil to Try in Your Kitchen
There are a few simple tests you can try to check whether the groundnut oil is pure or not. These tests are also highly recommended by food experts. Besides, these tastes are absolutely safe to perform in any household.
The Refrigerator Test (The Simplest Cold Test)
Pure peanut oil contains very high levels of monounsaturated fats that are good for health and which naturally respond to cool temperatures.
- The first thing that we are going to do is to put a small glass or container filled with about 4-5 tablespoons of the oil you bought.
- Then place this container into your kitchen refrigerator (not in the freezing section) for approximately 2 to 3 hours.
- After that time, look carefully, as a change is going to occur. 100% oil will gradually change and thicken all over, then it will become semi-solid or even form very soft white flakes.
- If the oil is still entirely thin, clear, and like water, it has been very heavily diluted with oils that do not congeal.
The Palm Rub Test
Because authentic cold-pressed oil does not undergo a Chemical Deodorization Process, its natural aromas can quickly awaken when exposed even to a slight increase of temperature.
Take a few drops of the product into your hand, then rub your hands one against the other for 10 to 15 seconds. The heat resulting from the rubbing will quickly produce the delightful, mouth-watering aroma of fresh nuts. On the other hand, a scentless, metallic smell or a greasy, sticky feeling is a sign of impurification.
If you’re looking for a unique and flavorful twist on classic poha, don’t miss our Maharashtrian Style Poha Recipe with Groundnut Oil—read the full article here.
The Gentle Heating and Foam Check
Put two tablespoons of oil in a small pan and heat gently over a low flame.
- The Pure Result: The oil will shimmer steadily and emit a wonderful nutty fragrance into your kitchen. Due to the natural protein content, pure unrefined oil might give a very mild and momentary froth, settling fast.
- The Adulteration Sign: If suddenly the oil begins to hiss vigorously or even crackle and smoke, this is a sign that a high-level chemical substance has been added or that there is hidden moisture in the oil.
One of the main factors in protecting the health of your family is being conscious about the ingredients of everyday food items like kadai. Pure groundnut oil is a great source of healthy fats for the heart and powerful antioxidants, but if the same oil is diluted, it can completely take away all this goodness.
Develop your senses through training, and you will be able to detect authentic groundnut oil. It is light in colour and has a nice roasted fragrance, and you will have a strong reason to support your purchase decision. Make it a habit to run these small experiments on the kitchen counter, avoid purchasing at suspiciously low prices, and, to help your family's well-being, always choose a nutritious meal.