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Before you reach the security line, tell a TSA officer you have medically necessary liquids
The real driver of the 28-day limit is microbial contamination risk from repeated vial punctures
It also supports nervous system health and functionality, and it helps protect and repair damaged nerves
Vitamin B12 for hair, skin, and nails If you have a very low level of B12, you may be prone to hyperpigmentation (dark spots) on your skin, vitiligo (light patches on your skin), mouth ulcers, eczema, and acne
Store them away from sunlight and heat
Retrieved May 3, 2025, from (Cautions that people with low blood pressure or a history of gout should not take niacin/niacinamide due to risk of hypotension and hyperuricemia
