Analysing the Composition of Commercial Turmeric Powder: Assessing Contaminants and Its Impacts Curcumin and Water-soluble Vitamins Levels

Aims: Turmeric, with its active component curcumin, has garnered global attention for its medicinal benefits, including anti-inflammatory and antioxidant properties. This study aimed to analyse turmeric powder obtained from the Greater Accra Metropolis for nutrients and contaminants.

Study Design: Experimental.

Place and Duration of Study: Entrance Pharmaceuticals, Accra for 6 months.

Methodology: 22 samples from 10 different processing sites and open markets were tested using physical and chemical methods. HPLC identified curcumin, ascorbic acid, riboflavin, thiamine, and pyridoxine levels. An independent t-test was done to compare concentrations of these nutrients in the powdered turmeric samples from the two sources.

Results: Assessment showed no yellow lead salts but 9.1% were adulterated with chalk, and 91% contained metanil yellow. Curcumin (2014.95 vs. 567.79), riboflavin (21.60 vs. 1.75), thiamine (14.75 vs. 0.65 mg/mL), pyridoxine (9.35 vs. 0.65 mg/mL), and ascorbic acid (0.00 vs. 101.60 mg/mL) were significantly higher (p<0.05) in processed samples than open market ones. Samples without adulterants had higher curcumin and micronutrient levels.

Conclusion: Strengthening monitoring programs is crucial to tackling food adulteration concerns.