Thanks HeyPK!Oxalate should not be very dangerous, except in high concentrations. Oxalate works by tying up calcium and depriving the organism of calcium. If you lived on a 100% diet of spinach, you could get into trouble, because you would get enough oxalate to tie up nearly all the calcium in your diet, and you would not absorb any. An occasional helping of spinach is no problem. The same should be true for shrimp.