When shopping for cooking oil in supermarkets, the labels “physically pressed” and “solvent extracted” are the two most common terms we see. Many shoppers wonder what exactly differentiates these two types of oil, and which one is healthier. Their fundamental difference lies in production processes, which further create noticeable gaps in nutrition, flavor and price. Below is a detailed comparison between physically pressed oil and solvent extracted oil.
1. Different Production Processes
The manufacturing method marks the essential distinction between the two oils.
Physically Pressed Oil
It adopts an entirely physical oil extraction method. Huge pressure generated by oil presses squeezes oil directly from oilseeds such as soybeans, rapeseeds and peanuts. Its main procedures include seed screening, impurity removal, roasting (skipped for cold pressing), mechanical pressing, rough filtration, sedimentation and refining. The whole process relies solely on physical force without any chemical additives.
Solvent Extracted Oil
This industrial mainstream technique applies the chemical principle of “like dissolves like”. Food-grade solvents dissolve oil from raw materials to form a solvent-oil mixture. The mixture is then desolventized to produce crude extracted oil. Afterwards, the crude oil undergoes multiple refining steps—degumming, deacidification, decolorization and deodorization—to remove residual solvents, impurities and harmful substances, turning it into edible finished oil that meets safety standards.
2. Varied Nutritional Profiles
Physically pressed oil retains nutrients far better. Free of chemical solvents and excessive high-temperature refining, it preserves natural nutrients inherent to oilseeds, including vitamin E, plant sterols, unsaturated fatty acids and phospholipids, all of which deliver health benefits to the human body.
Solvent extracted oil goes through high-temperature distillation and intensive refining, breaking down many heat-sensitive natural nutrients, leading to lower retention of beneficial active ingredients. That said, its core fatty acid composition remains intact, enough to meet basic nutritional demands for daily cooking.
3. Distinct Flavors and Tastes
Physically pressed oil carries the rich, natural aroma of its source seeds. For instance, pressed peanut oil boasts a strong peanut fragrance, while pressed rapeseed oil has a mellow rapeseed scent. Hot pressing involves high-temperature roasting, yielding an intensified aroma; cold pressing is conducted below 60°C with a milder, purer original seed flavor.
After thorough refining, especially deodorization, solvent extracted oil loses nearly all inherent seed odors, featuring a light, neutral taste with no prominent raw material fragrance. It suits people who dislike strong oily aromas and will not overpower the natural taste of ingredients in dishes.
4. Disparate Production Costs
Physical pressing demands high-quality raw materials, complicated workflows and high energy consumption, coupled with a low oil yield, driving up overall costs. For example, 100 jin (50 kilograms) of peanuts only yield around 40-plus jin of oil. Consequently, physically pressed oil is priced higher as a mid-to-high-end cooking oil product.
Solvent extraction achieves high oil recovery and is ideal for large-scale mass production, greatly cutting manufacturing costs. It is affordably priced for the general public, ranking as the best-selling daily cooking oil with outstanding cost performance.
5. Different Suitable Cooking Scenarios
With rich fragrance and intact nutrients, conventionally hot-pressed oil (without deep refining) has a relatively low smoke point. It works best for cold dressing, gentle stir-frying, quick boiling and soup simmering to maximize its aromatic advantage. Cold-pressed oil is recommended solely for cold salads, as high-temperature frying would destroy its delicate nutrients.
Fully refined solvent extracted oil has a higher smoke point and superior thermal stability, compatible with nearly all Chinese cooking methods including deep-frying, pan-frying, stir-frying and stewing. It performs better than pressed oil during prolonged high-heat cooking, fitting both household daily use and bulk oil demands of restaurants and canteens.
Neither physically pressed oil nor solvent extracted oil is inherently superior or inferior. They differ only in processing techniques to cater to diverse consumer needs. Physically pressed oil targets quality-focused buyers with its natural nutrition and rich mellow aroma; solvent extracted oil delivers great value and stable properties for mass daily consumption.
