Left breast milk taste different than right

Jane

So my 6 month old only feeds from the right side so I have a huge difference in milk production that I’m used to now. Today my left side was leaking a little and out of curiosity I tasted it and it was very bitter and nasty tasting. My right side is more sweet. Is there a reason for the difference in taste? And is it okay to feed baby from left side? I was going to start pumping the left to make it produce and build a supply but now I’m worried that milk isn’t okay to drink.