I'm afraid I'm not seeing any offers for samples on their website. But, here's their website if that helps any. You can get coupons from them though. I found Pronourish at Safeway today. But, didn't pick up any because even with my $2 coupon it would have been about $11 for 6 bottles. So, will have to think about it.
https://www.pronourish.com/find-us