[ZFeliz]

I honestly don't know whether mustard seed oil is a good idea for breast enhancement or not. However, mustard seeds/powder/oil are very spicy. I had a similar idea about using cayenne pepper to increase heat and circulation during massage, but it burned terribly. My skin was red for several hours, the cayenne pepper got in my nipples and burned them, and you could literally feel the heat rising off of my skin. I'm thinking the reason that you can't consume the mustard seed oil is because it's a type that easily becomes rancid. I wouldn't reccomend it.