I have used Nature's Lab products for years & have learned to trust this company & their excellent products! However, I purchased my Nature's Lab products from Costco. Of course, lately Costco has changed their product mix & has stopped selling some of the Nature's Lab products that I've used. I was very happy to discover that DrVita produces & sells the Nature's Lab brand! I've met (through texting & emails) David & Caylin in customer service. They have been a pleasure & a blessing to work with: very professional with the I can do attitude! Unfortunately, DrVita's prices are about twice as much as Costco's pricing!? Being retired I'm not sure what the future will hold for our business relationship: time will tell!?