Fisetin and quercetin represent the best-evidenced natural senolytic combination. Fisetin preferentially inhibits BCL-W and BCL-XL survival proteins; quercetin preferentially inhibits BCL-2. Together they cover the three primary BCL-2 family anti-apoptotic proteins expressed in senescent cells, making this combination significantly more effective than either agent alone.

Is fisetin+quercetin as effective as dasatinib+quercetin?

The D+Q combination has stronger human clinical evidence. Fisetin+quercetin is the most effective OTC natural alternative. For most people in their 40s–50s, fisetin+quercetin is a reasonable starting point before considering physician-supervised D+Q.

What ratio of fisetin to quercetin is best?

1:1 ratio (500 mg each) is the most commonly used protocol. Some practitioners emphasize fisetin more heavily (2:1 fisetin:quercetin) based on its stronger preclinical senolytic data.