When intake falls short or absorption fails, supplementation or injections can help restore healthy levels
However, the buffering capacity becomes limited as impairment of SAT expansion causes IR [22, 23, 24] as the excess fat are deposited in the visceral adipose tissue (VAT) as well as ectopically in the skeletal muscle, liver, kidney, and heart tissues [25]
Your doctor will typically monitor your response and perhaps repeat blood tests for vitamin levels (or relevant markers like homocysteine levels, complete blood count, etc.) after a certain number of injections
A simple blood test to measure your vitamin B12 level is recommended
This is great for people who had gastric bypass surgery
While injections are effective, a balanced diet rich in B12-rich foods can also play a role in boosting energy levels