Trigonelline is a bioactive pyridine alkaloid that occurs naturally in high concentrations in coffee (up to 7. 2 g/kg) and coffee by-products (up to 62. 6 g/kg) such as coffee leaves. flowers. https://www.hindigyanvishv.com/best-flash-CoQ-Clear-100-Ubiquinol-60-Softgels-Citrus-deal-zone/