At some point I was desperate and tried a bottle. Can't tell if it did anything, but by far the hardest thing to swallow I ever put in my mouth. Like ground up liquified concentrated pine needles. Get capsules.
I actually don't find it too bad. But then again, I'm coming from raw garlic, so anything is a (vast improvement).
BTW, if anyone is looking for an easy place to find this, just check in any Asian grocery store. You'll definitely be able to find the whole seeds ('kalonji', or 'black seed') which you can either chew or grind and swallow as a powder, and many also sell the oil preparation, which, as
@Adlyfrost mentioned, is big as a tonic among Muslims.
I put together a
toxicity summary earlier in the week, too. Just to make sure I don't poison myself in the process of trying this.
I have to say, though, that, like
@Ema, I haven't been impressed with the results. No changes for the better, as far as I can tell.