By virtue of its appearance and based on spectral data obtained
from a double concentrated tomato puree after thermal treatment,
it follows that lycopene was probably subject to both degradation and isomerization processes. Processing at temperatures 120 C
provided the evidence that contribution of non-enzymatic
browning reaction products with antioxidant activity (Maillard's
products) should be taken into account. The more efficient
extractability of carotenes should be ruled out neither.