Usually brands such as ihcg injections, US HCG shots offer you Vitamin B12 along with the other supplies. This takes the worry of finding a right brand. If it’s not available, then the manufacturer might ask you to buy separately from their website itself.
The main motive of vitamin b12 is to boost the energy level and keep your mood in control. Another thing is that vitamin b12 breaks down the hcg and other nutrients thus maximizing the absorption level in the body.
Hence, vitamin B12 is often combined with hcg diet protocol.