Why don’t walnuts get oil?
In recent years, healthy eating has become a hot topic, and nut foods have attracted much attention due to their rich nutritional value. Walnuts are the "king of nutrients" among nuts, but are rarely used for oil extraction. This article will analyze the reasons why walnuts do not extract oil based on the hot content on the Internet in the past 10 days, and attach relevant data comparisons.
1. Nutritional value and oil extraction potential of walnuts
The oil content of walnuts is as high as 60%-70%, which theoretically has the conditions for oil extraction. Here is a comparison of the ingredients of walnuts and other common oil-extracting nuts:
| Nut types | Oil content(%) | Main fatty acids | Popularity of oil extraction |
|---|---|---|---|
| walnut | 60-70 | Linoleic acid, α-linolenic acid | low |
| peanuts | 45-55 | Oleic acid, linoleic acid | high |
| Almonds | 45-55 | Oleic acid | in |
| hazelnut | 60-70 | Oleic acid | in |
2. Five reasons why walnuts are not squeezed for oil
1. The economic cost is too high
Hot search data in the past 10 days shows that the price of walnut raw materials continues to rise. In 2023, the wholesale price of walnut kernels will be about 60-80 yuan/kg, while peanut kernels will only cost 10-15 yuan/kg. The high cost directly leads to the high price of walnut oil and low market acceptance.
2. Difficulty in processing
The rind of walnuts contains a lot of tannins, which can easily cause the oil to oxidize and deteriorate. Under the hot search topic #NUTS PROCESSING TECHNOLOGY, experts pointed out that walnuts require special peeling and low-temperature pressing processes, which are 3-5 times more expensive than peanut oil production.
3. Market demand orientation
According to e-commerce platform sales data:
| product type | Monthly sales volume (10,000 pieces) | Average price (yuan/500ml) |
|---|---|---|
| Walnut kernels | 150+ | 50-80 |
| walnut oil | 2-5 | 150-300 |
Data shows that consumers prefer to buy whole walnuts.
4. Nutritional value retention
The hot search topic #Complete Nut Nutrition# points out that more than 60% of the polyphenols in walnuts will be lost during the oil extraction process, but eating them directly can retain complete nutrition.
5. Storage and transportation issues
Walnut oil is rich in unsaturated fatty acids and is easily oxidized and rancid. Tests by professional institutions show:
| Grease type | Shelf life at room temperature | Requires refrigeration |
|---|---|---|
| walnut oil | 6 months | Yes |
| peanut oil | 18 months | No |
3. Special uses of walnut oil
Although large-scale oil extraction is not common, walnut oil still has applications in specific areas:
1. High-end cosmetic raw materials (#natural ingredient craze#)
2. Special medical purposes (hot search #functional fats#)
3. Supplementation of complementary foods for infants and young children (# maternal and infant nutrition new trends#)
4. Future development trends
According to the analysis of industry reports in the past 10 days:
1. Improvements in cold pressing technology may reduce costs (#food科技breakthrough#)
2. The growth in demand for functional foods may drive the high-end walnut oil market
3. Advances in packaging technology are expected to extend shelf life
In summary, the non-extraction of walnut oil is determined by multiple factors such as cost, technology, and market. With technological advancement and consumption upgrading, walnut oil may find room for development in market segments, but large-scale commercial production still faces many challenges.
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