Frozen colostrum still good for older baby?

My baby was in the NICU for two weeks. Because of this, I had to pump instead of nurse and created an oversupply. The nurses saved and froze my breastmilk that I brought home, but some is from early on shortly after baby was born when my milk was a lot more yellow and well, a lot less milk-y. Wondering if these are still good to feed my baby (now 2.5 weeks old) or if I should toss them and just keep the milk that is from a little later (around when he was a week old). Thanks!