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Improved Mood and Mental Clarity: Supports neurotransmitter function

Skipping steps almost always backfires

By midlife, NAD+ can drop by 50%, exacerbated by inflammation and lifestyle.[14] Factors like poor diet, sedentary behavior, or chronic stress further deplete NAD+ by activating consuming enzymes, creating a vicious cycle

I feel like although the earlier commenters made it out like it's so 'uncommon', it's not at all

Symptoms of B12 deficiency can include fatigue, weakness, pale skin, shortness of breath, dizziness, memory problems, mood changes, and tingling or numbness in the hands and feet

To be absorbed, the vitamin needs to be attached to a protein called intrinsic factor