More than 200 studies of livestock by-products have been conducted in Tatarstan.

Since the beginning of 2025, laboratory specialists have conducted 228 tests on 38 samples of PPZh. The analysis included pesticide residues and levels of toxic metals such as cadmium, arsenic, lead, and mercury. The results showed that heavy metal levels do not exceed the established standards, as required by the Russian Government Decree. Furthermore, permissible levels for six types of pesticides were confirmed, not exceeding 0.1 mg/kg. All tested samples were found to be safe, allowing farmers to effectively use PPZh in agricultural production.