Tomatoes are rich in Vc, which can prevent your skin from being sunburned in hot summer and play a whitening role. Vc can prevent the formation of melanin and interfere with the formation of melatonin. Eating is definitely more effective than not eating, but it can't completely whiten. Also apply sunscreen on time, wash it before going to bed at night, pat it with water and apply it to repair or other whitening products.