Why an injection instead of a gel?

[Ryanmcd]

I have done gels and shots and like the gels better, and Crisler told me 3 weeks ago to go from the shots to the gels if the gel is working and I feel much better.

[zaggahamma]

I have done gels and shots and like the gels better, and Crisler told me 3 weeks ago to go from the shots to the gels if the gel is working and I feel much better.

very logical