I know that GHK and/or KLOW can have a "sting" because of the copper, but I am having a reaction when I inject any of the peptides. I let the filled syringe get to room temperature and every time the site still feels like a very itchy mosquito bite which lasts for days. I've tried tried stomach, hips and thighs. I'm wondering if I've developed an allergic reaction to the needle. Can anyone share their own experiences and if they have a recommendation for quality syringes?