I have heard it is pointless to take turmeric without piperine from pepper. The supplement link in my previous definitely has that assist to help the body take in the nutrients.
A truly therapeutic dose is very difficult to acquire orally, period. People have tried transdermal patches with some limited success, but as you can imagine it’s very messy with yellow staining. The most promising self-administered dose is via sublingual drops (you put the drops underneath your tongue for absorption) of liposomal curcumin with bioperine. You mentioned Gaia Herbs, they do a fine job with high quality organic herbal supplements but for therapeutic benefit, and by that I mean anything approaching the sort of dosages used in clinical trials for cancer, etc. you’d need to move to something a little more advanced. It’s fine as a general tonic and for aches and pains, though. I use some Gaia Herbs supplements myself, they’re practically local to me here in NC.