Gray hair in your 20s?
Premature hair graying (PHG) is a phenomena that occurs before the age of 20 in whites, 25 in Asians, and 30 in Africans.
6% - 23% of people have 50% gray hair by 50 years of age. 
-Lab tests not required
Causes of premature graying include:
-Inadequate diet leading to deficiencies of vitamins like B-6, B-12, biotin, vitamin D, or vitamin E, or minerals like copper.
-Exposure to excessive heat or pollution
-Consumption of water high in cadmium
Both sexes are equally affected.
Gray hair is coarser, stiffer, and less manageable than pigmented hair
Do not consume alcohol or smoke tobacco. Maintain a healthy diet and exercise regularly. Consume foods rich in antioxidants like:
-Fresh vegetables and fruits
-Seafood, meat and eggs are good sources of vitamin B-12
-Milk, cheese and salmon are excellent sources of vitamin D.
Medication is rarely recommended. However, medicated oils and creams may be suggested. Over-the-counter multivitamins are suggested.
With the help of mfine, you can connect with expert dermatologists to treat you specifically as per the cause.