Hi ELLA and you're welcome,

RC is Red Clover, It contains chemicals called isoflavones, which belong to a larger class of plant chemicals known as phyto (plant-derived) estrogens, red clover is often taken to relieve symptoms of premenstrual syndrome (PMS). Isoflavones are similar in shape to the female hormone, estrogen. Therefore, they may attach to estrogen receptors throughout the body particularly in the bladder, blood vessels, bones, and heart. Red clover can be used as an herbal remedy to treat the immune system and congestion, and as a herbal tea.

http://www.herbwisdom.com/herb-red-clover.html

I think it's starter in NBE programs at first, although it's still being used. But mainly used as a phytoestrogen in NBE, but it would rank in the top five behind PM for breast growth.

http://naturally-increase-breast-size.com/how-to-increase-breast-size-without-surgery-using-red-clover/

I was considering Chaste tree/ Vitex for the following:

*Chaste tree- (or chasteberry) is a native of the Mediterranean region and is traditionally used to correct hormone imbalances.

* At low doses, it blocks the activation of D2 receptors in the brain by competitive binding, causing a slight increase in prolactin release.

http://wikipedia.org/wiki/Vitex_agnus-castus#Current_uses
Mastodynia- http://wikipedia.org/wiki/Mastalgia

But currently it's at the bottom of the list.