It can often be difficult to find out the cause of acne, especially if flare-ups occur in adulthood. Dietary alterations have been helpful in some cases, however it should be noted that these have not been supported by medical studies. The natural approach to dealing with acne is to support the liver by removing processed and sugary foods from the diet and by avoiding excess alcohol. Anecdotal evidence suggests that diets high in dairy and red meat may also play a role.

Food allergy, or hormonal imbalance may play a role in some cases, especially in adult acne. Several trials have supported the use of nutritional supplements especially the use of Zinc. Amounts of up to 30mg 3 times per day may be taken but this should be combined with copper if used long term. Vitamin A has also been used to help treat acne. However, it should be noted that Vitamin A should not be taken by women who are pregnant or who may become pregnant as Vitamin A may cause birth defects.

Omega-3 fish oils may also be of benefit due to their anti-inflammatory effects. A number of herbs may be helpful for acne, Tea Tree oil can be applied topically and has been shown to be effective in clinical trials. Cleansing herbs such as artichoke may also be of benefit. If the acne is related to female hormone imbalance consider Vitex Agnus Castus.