Lemon juice and other natural remedies typically take about a week before noticeable results are present. Sometimes, lemon juice takes longer than one week for it to start having a discernible effect on the skin.
Lemon juice and lime juice are very popular all-natural skin remedies because they are extremely acidic. This allows them to be very safe and yet remarkably effective at bleaching out dark spots on the skin.
Dark spots can come from numerous sources, like acne, sun damage and aging, and start to become noticeable at the age of 25. There are numerous cosmetic remedies for this skin condition, but there are also many remedies using common household supplies.
When using lemon juice, it helps to mix the lemon juice with honey and then apply it to the affected area. This remedy can also be used as a face mask. Another combination that uses lemon juice mixes in cucumber juice and rose water. Also, lime juice can be mixed with turmeric. When used as a paste, this recipe helps fade away bad suntans. People also use this recipe on their hands and knees.
Besides honey and lime mixtures, some people also use horseradish mixed with vinegar and honey. This combination of ingredients can make the skin sensitive to ultraviolet light exposure, however. So, if it is used, it's important to wear sunscreen if going outside right after cleaning the skin with this recipe.