Optimal results require 8-12 weeks of consistent use combined with appropriate nutrition and exercise
Warning 1) To avoid overdose, take containing vitamin D and food intake enhancing vitamin D level into consideration
Vitamin B12 deficiency is Symptoms of B12 deficiency include: rapid breathing shortness of breath headaches palpitations or fast heart rate indigestion, diarrhea, or loss of appetite blurry vision weakness or tiredness mouth ulcers or irritation cognitive changes, such as difficulty with memory, judgment, or understanding infertility Contact your doctor to discuss injections or supplements if you experience any conditions or risk factors related to vitamin B12 deficiency
B12 is generally considered safe in all life stages even at high doses and there are no known interactions with any medications, but some drugs can increase the risk of B12 deficiency, including acid-lowering drugs and metformin
You might consider a B12 shot if you follow a vegetarian or vegan diet, since B12 comes mainly from animal foods