I’m not really sure what XPS is, I know there’s an XP, XPC and YP...
I got mine from ebay, but my dad lives in India, so he got his stuff direct from the distributor. He would put it into his morning cereal or coffee. I can swallow stuff, so I just put it in my mouth and wash it down with water.
I think it took him a couple months to notice an improvement. YMMV of course, but it’s worth a shot.
Thanks. I may be mistaking it for XPC. I had asked the local farm supply to get it for me several years ago, but they had to buy an entire pallet when they ordered. I bought XP instead, and my husband and I took it. I was working with the public at the time, and I believe it kept me from getting colds and flues. I just ordered 3 lbs. of XPC. Thank you for the information and for reminding us of this product.