Whey Proteins  Manufacturers, Traders, Suppliers

Fleksartis, LLC — a company with many years of experience in the food industry, producing the Kruglie Sutki brand. We specialize in manufacturing high-quality healthy products for those who value natural ingredients and care about their health. Our mission is to create nutritious, safe, and convenient products for everyday consumption.
Product philosophy
We use only 100% natural raw materials, preserving their natural nutritional value. All products are certified and produced in Russia from quality ingredients. Special attention is paid to recipes and production processes: formulations are constantly improved to achieve an optimal balance of taste and benefit.
Product advantages
Low calorie content — suitable for weight management and low-calorie diets
Sugar-free — ideal for those limiting sugar intake or monitoring blood glucose levels
Suitable for vegetarians — the range takes plant-based nutritional needs into account
Suitable for athletes — products provide quality replenishment of energy and essential nutrients
Strict quality control — continuous monitoring of raw materials and production stages
Quality assurance
All products comply with Russian standards and undergo mandatory certification. We regularly conduct laboratory and technological checks at every stage — from raw material selection to packaging — to ensure product safety and usefulness for the end consumer.

Target audience
Kruglie Sutki is aimed at people seeking a complete and balanced diet: active individuals, athletes, vegetarians, and anyone monitoring calorie intake and caring about their health.

Fleksartis, LLC under the Kruglie Sutki brand offers time-tested products that combine naturalness, low calorie content, and high quality standards. We continue to refine recipes and production technologies to provide consumers with reliable solutions on the path to healthy eating.

Whey Proteins are premium complete proteins derived from whey (a by-product of cheese manufacturing), processed via ultrafiltration, ion exchange, and low-temperature spray drying to retain bioactivity. The 200-mesh fine particle size ensures rapid dissolution in aqueous formulations and efficient absorption by the gastrointestinal tract, with protein digestibility corrected amino acid score (PDCAAS) reaching 1.0 — the highest level of protein quality.
As a core nutrient for muscle health, it contains all 9 essential amino acids, especially branched-chain amino acids (BCAAs, accounting for 20-25%), among which leucine is a key trigger for muscle protein synthesis (MPS). Common commercial forms include Whey Protein Concentrate (WPC, 70-85% protein), Whey Protein Isolate (WPI, ≥90% protein, lactose