Don't forget to take bromelain with quercetin for absorption. Life Extension sells a bio-available quercetin form to increase absorption. Below is an AI summary on bromelain.

Bromelain boosts quercetin absorption: Bromelain, an enzyme, helps break down barriers in the digestive system, allowing more quercetin to enter the bloodstream. This can increase quercetin absorption by 200-300%.
Improved effectiveness: By enhancing absorption, bromelain makes quercetin more effective, particularly for benefits like allergy relief and potentially reducing inflammation.
Synergistic effects: Quercetin and bromelain are often combined because their effects are amplified when taken together.
Bioavailability: Quercetin has low bioavailability on its own, meaning the body struggles to absorb it efficiently without help.
Empty stomach is optimal: Quercetin, especially when combined with bromelain, is best absorbed on an empty stomach.
Long-term use: Consistent supplementation for 4-8 weeks may produce more notable anti-inflammatory and immune benefits.
Liposomal form: Some formulations, like liposomal quercetin, claim superior absorption, with bromelain further enhancing uptake.