Table 1.

Clinical studies related to antioxidants for disease treatment.

Antioxidant	Administration route	Phase	Diseases	NCT number	Ref
Vitamin C	Injection and oral	—	Wound healing in mandibular fracture	NCT03938584	—
Vitamin D	Dietary supplement	—	Innate immunity in elderly people	NCT03026244	[22]
Vitamin E	Oral	Phase 2	Airway inflammation	NCT03444298	—
Selenium	Injection	Phase 2	Neurological outcome after cardiac arrest	NCT01390506	—
Zinc	Oral	—	COVID-19	NCT04351490	[23]
Curcumin	Oral	—	Chronic kidney disease	NCT03475017	[24]
Quercetin	Oral	Phase 1	Chronic obstructive pulmonary disease	NCT03989271	[25]
		Phase 2
Lycopene	Oral V8® low sodium	Recruiting	Metabolic syndrome	NCT03836651	—
Resveratrol and curcumin	Oral liposomed	Phase 2	Amyotrophic lateral sclerosis	NCT04654689	[26]