My understanding is while our neuropathy symptoms can ease after stopping any B6, it can take longer for the nerves to recover, and some may never recover. A lot of things can trigger neuropathy, especially starting a rigorous exercise routine. Easing your way up to rigorous is best... try baby steps to learn what your body can tolerate. I have just started a new exercise routine, and it's forward and backward, but mostly forward progress as I listen to my body.

I haven't heard anyone in my support groups talking about collagen as a trigger, but that doesn't mean it isn't for you. Foods that are triggering include gluten, dairy, sugar, artificial sweeteners, additives in ultra-processed foods, saturated and trans fats, alcohol, caffeine, and brown rice (brown rice is found in many GF products). These can all aggravate nerves and make neuropathy symptoms worse.

The foods above, plus viruses, histamine responses, stress, disrupted sleep, activity, and nutritional deficiencies, can worsen symptoms and cause flare-ups.