Role of lemon
The natural acidity of the lemon is part of what makes it such an ideal bleaching agent. Lemons are filled with citric acid, which is a fairly mild acid. For one thing, the lemon juice will help exfoliate your skin, which will remove older, dead cells from your skin surface and let the newer cells come to the top. This will often improve your skin's appearance and can help lighten your skin tone. The lemon juice will also work as a bleaching agent, helping to dissolve and eliminate some of the melanin pigment that is causing your darker skin.
Role of milk
Milk has two ways in which it helps lemon juice bleach your skin. First, it helps soften up your skin, which is important for letting the lemon juice penetrate the skin layers. Lemon juice works best as a bleaching agent when it can get past the top few layers of skin, which are already dead. Secondly, applying lemon juice to your skin can dry it out, which means that while your skin tone will gradually get lighter, it will also get dry and may flake.
Benefits of using lemon and milk
One of the main benefits of using lemon and milk to bleach your skin is that both products are natural. While there are a lot of skin bleaching creams and lotions that are commercially available, these products contain a lot of synthetic chemicals which can damage your skin in the long run. In addition, using milk and lemon juice as a way of lightening your skin is far cheaper than buying expensive cosmetic products. Another advantage of using milk and lemon juice is that you can add in other ingredients, such as almonds, to help enhance the effects.