Pay attention to the price. Too low a price may indicate that you have a fake. In order to produce a bottle of wine, you need to spend money on wine material (grapes), on its processing, on further bottling of wine, storage and transportation, etc. That is, the final price of a bottle cannot be low. If it is cheap, it is most likely made in powder form.
Color, smell, taste should not be too pronounced and harsh. Bright colors, strong smell are signs that there are impurities and additives in the wine. Or it is made from low-quality wine material. Most often fake semisweet, dessert, strong wines. But dry ones are more often natural, since it is difficult and unprofitable to fake them.
You can check the naturalness of the wine as follows. Fill a glass with water, and pour a drink into a flask or vial. Hold the neck of the vial firmly with your finger, turn the top upside down and immerse the vessel in water. When it is completely under water, remove your finger. If the wine is mixed with water, then this is a fake. In this drink there are many dyes, sweeteners and other substances. Natural wine is lighter than water, so there will be no mixing.
Drop some glycerin into the wine. If the drink is natural, then glycerin sink to the bottom of the glass and remain transparent. If you have a fake, then it will turn into reddish and yellow tones.
Look at the packaging for a purchase. If it does not indicate that the wine is natural, then such a drink should not be taken. In addition, the bottle of natural wine should indicate the year of harvest (up to one and a half years - matured, up to three years - vintage). Do not buy wine in boxes. Such wines are most often faked, since the use of glass containers significantly increases the cost of wine, i.e. manufacturers are not profitable to use bottles. And it is best to buy wine in special wine stores and boutiques, where the risk of acquiring a fake is less, and there are special conditions for storing this wonderful drink.