Summary Introduction: There is a high interest in creating medicines, dietary supplements, cosmetics including plant extract with antioxidant activity. For understanding whether plant extract has a maximum level of antioxidant activity it is important to know the total antioxidant activity of raw material. Objective: The main goal of study was to find out the green tea leaves total antioxidant activity. Methods: The antioxidant activity was measured by potentiometric method. Total phenolic, flavonoids, catechins and hydrocinnamic acids derivatives were quantified using Folin-Ciocalteu, aluminium chloride, vanillin and sodium molibdate methods, respectively. Results: The green tea leaves total antioxidant activity was 660.75 mmol-eqv./mres. dry weight. A significant correlation was observed between the amount of phytochemicals and antioxidant activity, which indicated its main role in antioxidant activity. Conclusion: The research showed that the green rea leaves possess a high value of antioxidant activity and it is a good source of phenolic constituents.

Aim. To develop the composition and technology for obtaining a dietary supplement “Cachinol” with the antioxidant activity in the form of granules used in the polycystic ovary syndrome. Materials and methods. To achieve the goal, physical, physicochemical, pharmacotechnological and statistical research methods, as well as generally accepted research methods of the State Pharmacopoeia of Ukraine (SPhU) 2.0 were used in the work. Results and discussion. The rational dosage form is granules. The green tea leaf extract and myo-inositol were chosen as the active pharmaceutical ingredients of granules. For 3 batches of granules, the following parameters were determined: the fractional composition ranging from 13.2 to 17.9 % for 3-2 mm, from 45.3 to 56.2 % for 2-1 mm, from 20.1 to 26.1 % for 1-0.5 mm, from 8.1-12.4 for 0.5-0.25 mm, from 2.95-4.6 % for < 0.25 mm; the moisture content of granules ranging from 2.80-3.10 %; the bulk density – from 0.49 to 0.52 g/cm3, the tapped density – from 0.54 to 0.58 g/cm3; the flowability was in the range of 8.00-8.25 g/s; the angle of repose – from 30 to 33°; disintegration – from 41 to 45 s. Conclusions. The flowchart for obtaining granules in industrial conditions has been developed. The technological process for obtaining granules consists of 8 technological stages. The studies of the technological parameters of granules have been performed in accordance with the requirements of the SPhU 2.0. It has been found that the granules developed meet the requirements of the SPhU 2.0 and can be recommended for further research.

The aim of the study. To determine phenolic and organic acids compound profiles, and the antioxidant, antibacterial and anti-inflammatory activities of raspberry leaf extract. Materials and methods. The object of the study was red raspberry leaf extract. The quantity of phenolic compounds was determined by applying a spectrophotometric method of analysis, whereas organic acids content was assessed by means of the alkalimetric method, while the antioxidant activity of the obtained extract was evaluated by employing the potentiometric method, and antibacterial and antifungal activity was ascertained through the wells method, and anti-inflammatory activity was found via carrageenan – induced paw edema assay. Results. The content of phenolic compounds was 18.45±0.37 mg/ml, catechins was 10.12±0.20 mg/ml, flavonoids was 3.32±0.07 mg/ml, hydroxycinnamic acids derivatives was 2.39±0.05 mg/ml and organic acids was 7.25±0.15 mg/ml. Moreover, the antioxidant activity was 76.11±1.48 mmol-equiv./mres dry, which was higher by 32.80% than the reference drug „Ascorutin”. Staphylococcus aureus bacteria was the most sensitive to the extract (25.00±0.00 mm), whereas Pseudomonas aeruginosa was the most resistant (21.67 ±0.66 mm). Treatment with red raspberry leaf extract at 1 ml/kg showed a significant edema reduction at 1, 2 and 3 h at 38.8, 41.8 and 48.8%, compared with the saline group. Conclusian. The present study indicated that red raspberry leaf extract possesses antioxidant, antibacterial and anti-inflammatory activities. Thus, red raspberry leaves are a promising source of bioactive substances that can be used for further developing medicines in the treatment and prevention of lifestyle diseases.

The aim of the work is to determine and evaluate the antioxidant activity of dietary supplements with green tea extract, as well as to introduce conditional terms of the level of AOA. Materials and methods. The object of the study was dietary supplements of different manufactures: “Green Tea Extract” of Natural Sources, USA (DS1), “Extract of green tea” of Elit-Pharm, Ukraine (DS2) and “Green tea” of Pharmakom, Ukraine (DS3). Potentiometric measurements were conducted by pH meter Hanna 2550 (Germany) with a combined platinum electrode EZDO 5010. Epigallocatechin-3-O-gallate ˃98.0 % (Sigma Aldrich), K3[Fe(CN)6], K4[Fe(CN)6], NaHPO4, KH2PO4 were analytical grade. Results. It was established that a value of the antioxidant activity of DS1 was 36.51 mmol/tab, DS2 – 29.78 mmol/tab, and DS3 – 16.67 mmol/tab. DS1 had the highest value of the antioxidant activity, which correlated with the content of catechins (r2 = 0.9314). According to the proposed conditional terms of antioxidant activity dietary supplements, DS1 and DS2 possessed a low level of antioxidant activity, whereas DS3 corresponded to very low level of antioxidant activity. Conclusions. It was found that the studied dietary supplements with green tea extract have antioxidant activity, which correlates with the content of catechins.