Without enough B12, your DNA synthesis goes haywire and since DNA is your body's instruction manual, this affects literally every cell you have
Over the following weeks most people notice steadier energy and fewer afternoon crashes first (weeks 12), then early fat loss around the midsection with workouts feeling more productive (weeks 24), then measurable body-fat reduction and better endurance and recovery (weeks 48), with metabolic markers like glucose and triglycerides often improving by week 8+
Interaction with fasting and ketosis Both fasting and ketogenic diets increase NAD+ levels through various mechanisms
If you are currently taking any other medications, let your doctor know before choosing a suitable B12 supplement
It is often found in both plant and animal sources, including meat, vegetables, cereal grains, legumes, eggs, and milk