Usually 24 hours after the first injections.
Side Effects. Pain/redness at the injection site, mild diarrhea, itching, or a feeling of swelling all over the body may occur.
Weakness and fatigue are common symptoms of vitamin B12 deficiency. They occur because your body doesn’t have enough vitamin B12 to make red blood cells, which transport oxygen throughout your body. As a result, you are unable to efficiently transport oxygen to your body’s cells, making you feel tired and weak.
Some weight–loss clinics offer vitamin B-12 injections as part of their weight–loss programs. Proponents of vitamin B-12 injections say the shots give you more energy and boost your metabolism, helping you shed unwanted pounds. … If you‘re hoping to lose weight, resist the lure of quick and easy solutions.
The usual dose for pernicious anemia-associated vitamin B12 deficiency is 100 mcg given as an injection into the muscle or under the skin once daily for 6-7 days. Then the dose may be given every other day for 7 doses followed by every 3-4 days for around 3 weeks. Then, 100 mcg should be injected every month for life.
About one week. The effects of our shots vary between individuals, but are typically felt for about one week. The nutrients we provide are water-soluble; the only water-soluble nutrient that has the capability of being stored in the body is B12, so whatever your body doesn’t readily utilize it will store for later use.
Cyanocobalamin is a man-made form of vitamin B12 used to treat low levels (deficiency) of this vitamin. Vitamin B12 helps your body use fat and carbohydrates for energy and make new protein. It is also important for normal blood, cells, and nerves.