Let's go back....

At age 23, the likelihood that you have serious PN is not high.

The likelihood that you are gluten intolerant however, is 1 in 130. Some say 1 in 30 now but I am still sticking to the 1 in 130 number.

The likelihood you need an expensive shotgun product is not high. That vitamin mix costs $30/month. YOu need 3 of those tabs for any effect.

I definitely do not like the oil...that is exhorbitant in price.

I think you should start taking 200 to 300mg of thiamine a day in divided doses for one month. That should be about $5 US.

If your sensations in your feet are due to a back injury..which you do have
a history of, then vitamins will not be a primary intervention.

Many of us (and maybe ALL of us) have to make accomodations regarding footwear. I think at this point, you should be spending $$ on that first.
Find a shoe that does not irritate your feet. With a soft inside, and roomy toe box. You can have a foot doctor check you out, to make sure you do not have some issue with pronation, or damage like sesamoid bone dislocations or breakage, spurs, etc. This is the best way to tackle your problem while it is still new to you. My son has a pronating right foot that requires orthotics, or he has a terrible time with his feet. The proper orthotic support removed all of his discomfort. I do not feel that proprietary remedies like you are researching are worth the money. Each person has his/her own set of problems that a shotgun product may not address.

Footsmart.com has many nice shoes to choose from if you can't find variety where you are.