How should I read a homeopathic medicine label such as “Arnica montana 30C”?
“Arnica montana” is the Latin name of the source material, the Mountain daisy. Homeopathic medicines use Latin names, the international scientific denomination for source materials.

The “30” indicates that the source material has been homeopathically diluted 30 times. The “C” stands for “Centesimal” and indicates that each of the 30 dilutions was made at the rate of 1/100.

Which homeopathic dilution should I choose?
The level of dilution in homeopathy does not correspond to strength: a 30C is not stronger than a 6C. The difference is in their level of action. While a 6C is suitable for local symptoms, a 30C or higher is more appropriate for more general conditions such as allergies, stress or sleeplessness.

Micro-dosed homeopathic medicines above 4C are safe and have no known side effects or contraindications. They can be safely taken with other conventional medicines and are sometimes recommended to complement other treatments.