Hi. Greetings. Premature greying could be a result of hereditary factors, environmental stresses, hormonal issues, vitamin deficiencies. You may require proper evaluation in light of these possibilities. Vitamin tablets may help... You may also require some peptide lotions. However, you need to understand, reversing greying of hair is very tough. I am not aware if tugaine will help for white hair, usually it's useful for hair fall. Hope this helps. Warm regards