There’s a big thread going on at acne.org about Apple Cider Vinegar (ACV) and Lemon, and it seems quite promising.
The method is basically:
1) Apply ACV to your face once or twice a day after cleansing and before topicals. It is possible to dilute the ACV with water. For instance 1 part ACV and 2 parts water, but it is also possible to use it “clean” if your skin is not too sensitive.
It is also possible to drink ACV. Mix 1-2 teaspoons honey and 1-2 teaspoons of ACV in a glas of water. Drink 2-3 glasses a day.
2) Drink water with lemon juice in. Add half a teaspoon of lemon juice for every glass of water and drink around 8 glasses a day.
The ACV is supposed to gently exfoliate your skin and even out the skin tone, and the diluted lemon juice is supposed to wash toxins out of your body.
It is important not to overdo the lemon juice part in that it can have the opposite effect.