No, not really. Vodka is produced exclusively from food raw materials (GOST 12712-2013 Special vodka and vodka. General technical conditions). Since grain is currently the most accessible and cheapest food raw material, alcohol for vodka is not produced from other types of food raw materials (potatoes, beets, etc.).
Mikhail, methanol does not turn into ethanol.
Fractions are separated in the distillation column.
Bottom fractions containing methanol, vinegar, aldehydes are separated. Then ethyl alcohol is distilled - body.
At the end are the tail fractions - low-boiling alcohols and fusel oils containing smelly sulfur compounds and mercoptans. Copper meshes and copper columns are needed for copper to react with sulfur compounds. This significantly improves the taste and smell of the product.
But they do not convert methanol to ethanol.
No, that's not true. Generally speaking, it is forbidden to use alcohol for the production of some kind of drinks, not from food - this is potatoes, grain of different varieties. They don't clean up a little bit in cheap vodka.
In fact, we do not have cheap vodka and all vodka is very expensive - not in terms of purchasing power. And now it makes no sense to talk about expensive vodka, because very few people buy it. And cheap vodka costs about 250 rubles in a store - yes, this is at least twice the purchasing power.
How the human body perceives vodka depends on the dose. In small doses, this, in principle, can be positively perceived: you can relieve stress, you can use it for the stomach in case of poisoning. It will be easier with vodka and for vessels. This is such a massive drink that it is difficult to talk about the benefits - it is there, but only if you drink it in small quantities. Too much vodka is harmful to the liver, kidneys, stomach. Alcohol, like any product - if there is too much of it, then it does not bring any benefit. If a person is a heavy drinker, then, of course, some sores accumulate there, but they are completely different.
Vodka products are distinguished by the purity of alcohol, water, the amount of minerals in this water. The water is not all absolutely pure, it is specially prepared at the plant, a certain mineral composition is selected.
Swedish "Absolut Vodka" is made in distilled water, and ours, in order to give taste and aroma, try to add certain salts to the composition of water during preparation. This is a pretty big deal.
You can make soft, but you can make hard vodka. St. Petersburg vodka is soft, because earlier water was taken from the upper reaches of the Neva River, it is soft. River water is always soft, there are no hard salts in it. And in Moscow they always took water from artesian wells, it is always mineralized in Moscow.
This is a rather complex story, and in general vodka is a rather complex product. It all depends on the producers of alcohol, on who did it, at which plant it was done. Everywhere there are peculiarities and nuances.
In principle, alcohol can be made from anything: food, wood, and oil. But with oil, everything is quite complicated, because methyl alcohol is oxidized on a copper lattice to ethyl alcohol. The chemistry is quite complex, and it's easier to take potatoes than oil and make alcohol out of them.