Cumin (Black Cumin / Kalonji) for Blood Sugar Regulation

Research suggests that black cumin (Nigella sativa) may have potential benefits for blood sugar regulation, though the evidence is limited and mixed. A 2010 narrative review of existing pharmacological literature identified blood glucose reduction as one of several possible therapeutic properties associated with the plant's bioactive compounds, including thymoquinone, but this finding reflects a summary of earlier studies rather than new experimental data. In contrast, a more rigorous double-blind, randomized controlled trial from 2019 found no meaningful effect on fasting blood sugar, insulin levels, or insulin sensitivity in healthy male participants over a four-week supplementation period. The current body of evidence is too preliminary and inconsistent to draw firm conclusions, and it is worth noting that the available clinical research has focused on healthy individuals, leaving open the question of whether results might differ in populations with impaired glucose metabolism.