It's so tricky! Spam has gotten more and more sophisticated and I didn't want to sound like I was hocking chia. "Hey guys, I just found the AMAZING prodcut (sic) and it's TOTALLY CURED ME OF CROHN'S!!!" But they are good, I'm enjoying them.
I think as long as you're not promoting any particular one brand of chia seeds, no one should consider your recommendation to be spamming. I assume that nobody can patent chia seeds and monopolize the market (quite unlike drugs such as Humira or Remicade). Perhaps it's even possible to grow your own chia seeds, though probably easier just to buy them.