A simple and quick way to get the benefits of the medicinal properties of herbs is via absorption through the nasal mucuous membranes and the skin. Use aromatic herbs for these bath balls as the essential oils are well absorbed via this route. Have a herbal bath at the first sign of a cold, sore throat, if you just got a bit chilled, or travel on public transport or on a plane. Also have a cup of the herbs listed below, keep warm and have plenty of rest. 

As someone working with a lot of women with oestrogen-dependent conditions, such as fibroids, endometriosis, cysts etc., I have always noticed the high incidence of gut inflammation in these patients. Often reducing inflammation in the gut, and  systemically throughout the body, can help to significantly reduce or get rid of many of the symptoms typical for these conditions. Absorption of nutrients will undoubtedly play a big part in this, but there are some other, more direct mechanisms to do with inflammation that are becoming more apparent these days.

One of the mechanisms responsible for this improvement is that by reducing inflammation one can reduce oestrogen levels - here is the mechanism explained ...

Inflammatory agents have an effect on aromatase conversion. Aromatase is an enzyme that promotes the conversion of testosterone into oestrogen, so once activated more oestrogen is produced.