“…One study 14 included both at‐home and in‐office techniques. Nineteen different natural antioxidants were evaluated in the included studies: grape seed extract or proanthocyanidin, 2,12,14,27,29‐35,37,43,44,46,47 green tea, 10,14,28,29,35,36,38,39,42,43 alfa‐tocopherol, 35,38,40,43,44,46,49 aloe vera, 29,37,38,48 pomegranate peel extract, 27,29,30 lycopene, 2,43 pine bark, 30,32 epigallocatechin gallate, 12,45 pelargonidin, 5 malvidin, 5 guava seed extract, 44 superoxide dismutase, 49 sage, 12 sweet potato extract, 47 white tea, 39 hesperidin, 40 rosemary extract, 41 and pedicularis extract 41 . Most studies also included sodium ascorbate experimental groups, except for 6 14,28,30,45‐47 …”