Mommas who are feeding solids

I plan to ask our doctor this in a few weeks but wanted to see if any of you had researched this more than I have or spoken to your doctor about it.

Has anyone used the Ready, Set, Food powder in their babies bottles? I’m 100% willing to order it, if it is proved to be beneficial but don’t want to waste money or put it in my sons body if it’s not healthy.

Also, I’m super anxious about food allergies. This is probably dumb, but if they have a reaction what are the proper steps to take? Again, I’ll ask our doctor, but was thinking about all of this and wanted your opinions. Thank you!!