NOW brand is what I use.

NOW and Nutracost tablets. I rotate between those two, because I'm probably overly concerned about efficacy.

NOW brand has served me well on most things

I've used Nutricost for years with great success.

I use bulk supplement dot com powder form and weigh it out on a small scale. Chuck it in a small juice or tea or something you can swallow fast. It's yucky, but cheap and one less pill to swallow

Walmart's Spring Valley brand. 100 capsules of 1000 mg each for $11.

Nutricost has worked for me

I use Thorne Research, more expensive but always fresh and works well.

I use Vitamin Shoppe brand they are capsules.

Wow! Thank you for all of these responses!