Vitamin B12 Injections for Hair and Skin Health: The Ultimate Beauty Booster I got B12 injections in September and my skin started getting bad in October. I stopped the B12 in February when I finally realised that was causing the acne. My skin is soooo much better now, I would Taking Vitamin B12? Read this first. While B12 is often hailed as a safe energy and brain booster, many real users are reporting unexpected side effects including anxiety, insomnia, Hot take: The skincare world told you vitamin b12 causes acne but yet your skin, brain, and hormones literally need it to function and everyone forgets to mention it's essential for detox, Breakouts from Vitamin B12 are some of the most common I see, even in longtime clients who are using excellent skin products and otherwise have their acne under control. , B12 causes inflamed acne and