|ESSENTIAL OILS AND SAFETY
Most essential oils are safe if used in a dilution of under 4% and many are best used in a 2.0% or 2.5% dilution.
This means that if you are using 25mls of carrier oil, you should add no more than 4% essential oil. 4% of 25mls is 1ml and 2% is 0.5ml.
We are often asked, how do I measure 0.5ml (or any other amount) in terms of the number of drops dispensed from a bottle of essential oil?
Most aromatherapy books say that 1ml equals 20 drops but this has recently been found to be extremely inaccurate and misleading. (See the article by K.P.Svoboda and others in the International Journal of Aromatherapy Vol 10, 2000, pp.99-103) The true figure depends on both the type of insert being used and the viscosity of the oil. If you are a customer of Bay House please contact us and we will send you a list of all the oils we sell in terms of the number of drops in one ml. (References to drops in the section below refer only to oils dispensed from Bay House bottles)
SOME OILS SHOULD BE USED WITH CAUTION (OR NOT AT ALL) BY SOME GROUPS OF PEOPLE
There are many opinions on this and much of it is based on repeating other opinion, rather than any firm evidence. Where evidence does exist it is usually based on research with rats or with oils taken internally and is not necessarily applicable to normal aromatherapy use. The following recommendations are based on the findings in R. Tisserand and T.
Balacs, Essential Oil Safety, A Guide for Health Care Professionals, 1995, and by the Research Institute of Fragrance Materials. We do not give advice about oils we do not sell. These recommendations refer only to the oils stocked by Bay House. This is important. For example the fact that we give no contraindications for basil is because the basil we sell is safe. There are other basil oils which are not. (In technical terms we sell the high linalool
chemotype. Other chemotypes exist which are high in carcinogenic
DO NOT USE THESE OILS IF YOU ARE PREGNANT
Hyssop (contains the toxic ketone pinocamphone)
Rosemary (contains neurotoxic ketones - but there is no evidence that using rosemary oil has ever caused any problems, it is also a permitted food
Sage (there are many species of sage and much of the research does not apply to the Salvia lavandulifolia which we sell. There are also various chemotypes within this species. However, according to Tisserand and
Balacs, the combination of camphor and Sabinyl acetate that it contains is potentially harmful)
Spike Lavender (The high camphor content of this oil indicates a possible neurotoxic danger)
DO NOT USE THESE OILS IF YOU ARE BREASTFEEDING
Hyssop (see above)
Jasmine (It may decrease the flow of milk)
DO NOT USE THESE OILS IF YOU ARE PRONE TO SEIZURES
Hyssop (see above)
Rosemary (se above)
Spike Lavender (see above)
SOME OILS ARE PHOTOTOXIC AND SHOULD NOT BE USED PRIOR TO GOING OUT IN DIRECT SUNLIGHT
(or other sources of ultra violet light)
Bergamot (do not use more than 0.4% or 11 drops in 100ml of carrier oil or cream. We also sell Bergamot FCF which has had the furocoumarins removed and is therefore non
Grapefruit (do not use more than 4.0% or 112 drops in 100ml of carrier oil or skin cream)
Lemon (do not use more than 2.0% or 52 drops in 100ml of carrier oil or cream)
Tagetes (do not use more than 0.05% or 1.5 drops in 100ml of carrier oil or cream)
SOME OILS MAY IRRITATE THE SKIN, USE THE FOLLOWING ONES WITH CARE, ESPECIALLY IF YOUR SKIN IS BROKEN OR SENSITIVE)
Cinnamon leaf (do not use more than 3.0% or 81 drops in 100ml of carrier oil or cream)
Clove bud (do not use at more than 3.0% or 84 drops in 100ml of carrier oil or cream)
Lemongrass, Melissa (true), Thyme (use with caution if your skin is damaged or inflamed)
IF YOU ARE WORRIED ABOUT YOUR HEALTH OR ANY SYMPTOMS YOU ARE TREATING PERSIST YOU ARE ADVISED TO CONSULT A QUALIFIED AROMATHERAPIST OR MEDICAL DOCTOR