Yes it is okay for hands and legs. Skin is the mirror of internal health and to get a perfect skin you need to treat both ways - internally and externally. A good skin care regimen comprises 4 steps - cleansing, toning, moisturizing and sunblock. Based on your skin type, a dermatologist will recommend you appropriate products. There are few add on treatment options which may expedite the final results and include chemical peels and Q-switched Nd:YAG lasers