Over the past several years I have had right sole pain, just starting into the arch where the ball of my foot meets it. Primarily on my right foot, but I have had it on the left as well. I have not had that happen since I have been on NR/Ubiquinol, but sometimes I could go a year or so without it. Interesting as I hadn't heard of others having sole pain that wasn't induced by trauma so I am glad to hear others have similar things. I have always thought it was perhaps a gout type of thing. As to other odd pains, joints/tendons and such, my wife and I have had them recently. My wife and I had started on pterostilbene for about a month before she tried NR and had developed pretty severe foot pain (enough to go to the doctor). She then added NR to the mix but it didn't help at all. I noticed around the same time she started feeling pain (we started taking pterostilbene around the same time, but I had already been on NR for some time) I started to have tendon type pains, especially in the areas where I had previous injuries. Because my wife was having the foot pain before the NR while on pterostilbene, we both eliminated pterostilbene from our supplements. Her foot has slowly been getting better and my tendon pains have disappeared. I am leaning towards pterostilbene as a possibility of your pain.
Nate, I see you take a B-Complex in your stack. Have you had your B12 checked lately? I have had cramps and spasms for the last 35 years or so and the NR has really helped me with them (I believe). I did have a couple recently that I attributed to dehydration. Recently I had blood work done and specifically asked for my B12 to be checked as my Family has a history of problems with B absorption. I also had problems when I was on metformin for years that I now attribute to low B12. My blood test showed I was a tick above the bottom level of normal (low 200's). I have read B12 can have an effect on muscles and cramping and such. Just a thought. Good luck.
Qrazy (and others): if you have longterm neurological symptoms and a B12 level of 200, any doctor should take action. Especially in case of a family history! You should have shots to get way above this gray area value. This thread is totally veering off topic but because of the risks involved for you I needed to post this.