Identification of the best plant ratios for a polyherbal tea mix to obtain optimum antioxidant, antidiabetic, and β-glucuronidase inhibition activities.

Background: The influence of plant types and their ratios on the effectiveness of polyherbal formulations is a crucial yet underexplored area of research.

Objectives: This study aimed to identify the optimal ratios of Phylanthus debilis (PW), Osbeckia octrandra (HB), and Artrocarpus heterophyllus (WR) leaf powders for a polyherbal tea to achieve the best functional properties.

Material And Methods: A three-level factorial design was used to examine the combined effect of three independent variables (PW, WR, and HB) on antioxidant, antidiabetic, and β-glucuronidase inhibitory activities.

Detection of Ni, Cd, and Cu in green leafy vegetables collected from different cultivation areas in and around Colombo District, Sri Lanka.

Five types of green leafy vegetables ["Kankun" (Ipomoea aquatica), "Mukunuwenna" (Alternanthera sessilis), "Thampala" (Amaranthus viridis), "Nivithi" (Basella alba), and "Kohila leaves" (Lasia spinosa)] were randomly collected from six different locations (Wellampitiya, Kolonnawa, Kottawa, Piliyandala, Bandaragama, and Kahathuduwa) in and around Colombo District, Sri Lanka, and subjected to analysis of three heavy metals [nickel (Ni), cadmium (Cd), and copper (Cu)] by atomic absorption spectrometry. Soils from green leafy vegetable cultivation lands and irrigated water were also tested. The average concentrations of heavy metals Ni, Cd, and Cu in soils were 51.