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Hicks EM, et al

To each extract concentration of leaf extracts (25, 50, 100, 200, and 400 g), 2.5 mL of Folin-Ciocalteu reagent (1/10 dilution) and 2 mL of 7.5% Na 2 CO 3 (w/v) solution were added and incubated at 45 C for 15 min and the absorbance was read at a wavelength of 765 nm using a spectrophotometer (OPTIZEN Alpha, K Lab Co., Ltd., Daejon, Republic of Korea)

It is safe to use if you use it carefully in your routine

Riboflavin (Vitamin B2) (as riboflavin-5-phosphate)

Available from: Concurrent Administration of COVID-19 and Influenza Vaccines Enhances Spike-Specific Antibody Responses - PubMed [Internet]
