Hi Preet ,
Welcome to healthcare magic!!
No they are not harmful, infact they will help you in long run . They have phytonutrients -antioxidants
present in them , which is scientifically proven. Amla is rich source of vitamin C
But avoid the allergens like dust mites, insects, fungi and animal dander,pollen or if you know the specific allergen avoid that one.
Also be sure to take pure and trusted source.Aloevera
gel can also be applied externally on hairs and skin.
For hairs there is one more herb namely ' HIBISCUS' / japa pushp.