We can confirm deficiency with a lab test, or you can simply try a few injections and see how you feel most people notice a difference quickly
Given the vitamin B6 content in foods, you can rest assured you wont go over that threshold in your diet

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Supplementing vitamin D can improve these behaviors and is generally safe with minimal side effects
If you have low levels or a proven deficiency, you may benefit from supplementation which can be discussed during a consultation where you may be prescribed Vitamin B12 booster injections
Ive had it hurt a few hours later but the only time that happened when a nurse was a bit rough and it made me tense up a bit so it hurt as my muscles were tight could be a combination of a pinched nerve and muscle tightness