Hygiene and health Essential oils Health Aid Orange Oil (Citrus sinensis) 10 ml 10 ml Orange Oil (Citrus sinensis) 10mlis a favourite oil for baths during winter. Its sweet fragrance is relaxing and may be helpful in maintaining normal sleep. Pure essential oils can be used as essences in the bath or in vaporisers. They can also be used to make up your own massage blends having first diluted them in HealthAid massage oil base or lotion base.