The consumption of supplements by active individuals has been increasing over the last few
years. Whey protein is one of the highly consumed supplements. Hence, this study aims to analyze
the proximate and heavy metal content of different brands of whey protein. This cross-sectional
study was conducted on 6 brands (5 international and 1 local), The results showed that brand VI had
the most protein content percent change of - 18.65%, brand V showed the highest fat percent change
of -83.12%, brand II showed the highest carbohydrate percent change of +867.52%. Regarding the
heavy metals, brands land IV-VI were free from Pb. The highest arsenic concentration was in brand
III (8.69 mg/kg). The highest cadmium concentration was found in brand III (1.3 mg/kg), followed
by 0.58 mg/kg and 0.6 mg/kg in brands II and VI, respectively. Aluminium concentration was the
highest in Brand VI. The examined brands of whey protein supplements sometimes lack the macros
that are written on the package, thus they fail to produce the planned results from having whey protein supplements in the diet. Furthermore, they may have a risk of heavy metal contamination, the
higher the supplementation dose (acute), the higher the contamination and the risks.