To provide theoretic basis for the use of lycopene,the stability of natural lycopene in different conditions was studied.The results show that Fe 3+ and Cu 2+ influence the stability of lycopene greatly,and NaOH damages the stability of lycopene greatly.Lycopene keeps stable in acid conditions. Oxidant, reducing agent and preservative.little affects the stability of lycopene, but antioxidant delays the loss of lycopene. It's also sensitive to sunlight. Being exposed to sunlight for 1 day results in the total loss of lycopene;it is also sensitive to UV and lamp light,but ra...