Fennel oil is a remedy for digestive complaints such as flatulence, constipation colic, nausea, vomiting, anorexia, dyspepsia and hiccups. It is also used in cases of obesity, as it promotes that 'full feeling' and has a diuretic effect that helps to disperse cellulite. For the mind, it adds courage and strength in the face of adversity. It has a cleansing and toning effect on the skin helping with bruises and sorting out overly oily skin and fighting wrinkles in more mature complexions (possibly due to the estrogenic properties of the oil).It has a toning effect on the spleen and liver that helps with the results of excess drink and food. It is also used for increasing milk production in nursing mothers - but for boosting breast milk, rather use the fresh herb, since the oil contains very high concentrations of trans-anethole.