Is aloe vera helpful for sun burned skin?

Yes. Aloe vera contains anti-inflammatory acids. Aloe vera soothes inflammed, burned or irritated skin 7 decreases the chance of skin infections.
Yes. Aloe vera contains antioxidants and possesses anti-inflammatory properties which help to calm the skin and reduce redness. It also stimulates skin growth and repair which make it useful for sunburns and minor wounds.