The walnut oil squeezed by myself is not the same as that bought. The difference between the two is that the walnut oil squeezed by oneself is relatively clean and pure, and there is no other substance. It is all walnut kernel, but there may be strains. What I bought outside may be mixed with other substances, which are not pure, but they are made in a sterile environment.
For places where walnut oil is squeezed, in fact, as long as there is an oil press, it can be squeezed anytime and anywhere. Just need to go to some sterile or relatively sealed places for squeezing, so as to ensure that the production process is as sterile as possible, so you can go to some factories specializing in walnut oil for squeezing.
Walnut oil is good whether you make it yourself or buy it. It has a light taste and is easily digested and absorbed by the body. It is the first choice for children, pregnant women and postpartum recovery period. It is a healthy edible oil and can replace other edible oils.