Does Spring Valley brand Melatonin 3 mg contain any animal products?

After looking around on several different websites, I have found minimal help with this question. A few sites say it is synthetic, although it is not listed on the bottle, and it doesn't help that the bottle has a lack of information and Spring Valley doesn't have a site. I've purchased SV Melatonin 3mg a week ago from Walmart. The walmart product QnA blog says that "it is synthetically derived." It isn't entirely clear, but you could always call your physician or a pharmacy just to make sure.