Tomato peels contribute a high concentration of the carotenoids found in tomatoes. … The tomato skin also holds most of the flavonols (another family of phytochemicals that includes quercetin and kaempferol) as well. So to maximize the health propertiesof tomatoes, don’t peel them if you can help it!
You can also read How long will it last?
Should I remove tomato skin?
To can or freeze tomatoes, or to make sauce or soup it is best to remove the tomato skins (and seeds) before doing so. Tomato skins and seeds are harder to digest and they do not cook down like the flesh does and will appear as seeds and strips of skin in your finished product.
Is there any nutrition in tomato skins?
Several studies have already shown that the skin of some tomato fruits contains significantly higher levels of phenolics, flavonoids, lycopene, ascorbic acid and antioxidant activity than pulp and seed fractions (Sharma and Le Maguer, 1996, Shi and Le Maguer, 2000, Toor and Savage, 2005).