... provide 30%,40%,50%,60%,70%, 80% water-soluble propolis powder. Propolis is rich in the human body needs flavonoids, terpenoids, vitamins ... material .The heavy metal and pesticide residues of our refined propolis is lower than the national standard,can reach EU standard ... .05 ppm Arsenic: ≤ 0.05 ppm 1kg/bag10kg/carton best propolis powder