From the manufacturer's website:

Erythritol is a type of carbohydrate called sugar alcohol, which are water-soluble compounds found naturally in many fruits and vegetables. It is also produced commercially by fermentation from a simple sugar derived from corn called dextrose. It is used as a zero calorie sweetener to help replace calories from sugar-containing carbohydrates in packaged foods and beverages.

Is erythritol naturally occurring?
Yes, erythritol is found naturally in fruits such as grapes, peaches, pears, and watermelon. It is also found in mushrooms and fermented foods such as beer, cheese, sake, soy sauce, and wine. Erythritol is commercially used in the production of baked goods, soft drinks, sweets, chewing gum, chocolates.

What are the health benefits of consuming erythritol?
Like most sugar alcohols, erythritol is not as sweet as sugar: it is only about 60-80 percent sweet. The lack of calories makes erythritol unique among sugar alcohols, most of which are around two calories per gram (compared with about four calories per gram). The health benefits of erythritol extend beyond replacing the carbohydrate-sugar calories in our diet. Two areas where erythritol is known for its positive effects are oral health and blood sugar levels.
Nutritional values in 100 g:

energy value
0.84 kJ / 0.2 kcal
fat 0 g
of which saturated fatty acids 0 g
carbohydrates 99 g
of which sugars 0 g
of which hydroxy
alcohols 99 g
protein 0 g
salt 0 g
Net content: 500 g

100% erythritol

Country of Origin: China

The only issue with this product is that it is manufactured in China and packaged in Poland.