I think someone on a previous thread mentioned that they only had success when using a tincture. It may be worthwhile to try that route - my primary method of ingestion.
I would also re-state my personal preference among OTC products is the CWHemp company. They are a known entity with a good track record (at least I haven't heard anything bad about them). Other products/companies may be OK, but the market is relatively new and unexamined. I'm not convinced that all of them are in it for the well-being of their fellow human.
A review site of sorts can be found here. I don't know how trustworthy this site is, but at least they seem to be trying to discern products making a good faith effort to sell quality products. It also gives you a sense of the choices out there. Use your judgment.