Just catching up to all the comments. I have had pins/needles 5-10 minutes into exercise. Mostly back neck and head. Sometimes worse than others. I am 60 yo and remember having this in my 20s but went away. I tried decreasing caffeine, increasing B complex vitamins, changed my body soaps and lotions. Nothing seems to work so far. Read with interest about beta alanine. Will research this.

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