Dr. Cara McDonald

So it's worth trying other brands, but I haven't come across any supplements yet.

Correct.

It does rely on zinc in its action.

There's a zinc-dependent enzyme in the action.

So if you are zinc-deficient, there may be an issue there, but I wouldn't say that taking zinc is going to make any difference, really.

Yes.

Fortunately, it's a very, very safe treatment.

As I said before, the best thing about it is that it wears off.

But the most common side effects are just injection related.

So pain, bruising, a little bit of swelling, a little lump.

A lot of people do get a headache the first time they have it, but then don't tend to get it subsequent times.

So that's something we always warn people about.

And then pretty much all the other side effects are related to kind of too much, too little, asymmetrical, or getting it in a muscle where you didn't quite intend it to go.

And so that can cause things like we talked about before, heavy eyebrows.

It can cause a droopy eyelid if you get some toxin into sort of the deep layers under the brow and it can track down and cause a droopy eyelid.

That's a very unfortunate, annoying side effect.

Is that when you have it underneath your eyebrow, you're...

It's when the needle goes too deep.

So it doesn't, you can still actually put it under your eyebrow and that can actually help with brow elevation.

But if it's too deep, so it goes into the deeper layer, there's a little muscle, which is an eyelid opener muscle, which is deep in your orbit.