Vitamin B5, or pantothenic acid, is a vital, water-soluble B vitamin essential for converting food into energy,
creating coenzyme A (CoA) for fat/protein metabolism, and synthesizing hormones and neurotransmitters
. Found in nearly all foods (meat, eggs, whole grains, veggies), its deficiency is rare,
but it supports skin, nerve function, and red blood cell production, with supplements often used for energy or skin/hair health.
Key Functions

Energy Production: Helps break down fats, carbs, and proteins into usable energy (ATP).
Coenzyme A (CoA) Synthesis: A precursor to CoA, vital for building/breaking down fatty acids, steroids, and other compounds.
Hormone & Neurotransmitter Production: Aids in making sex/stress hormones and brain chemicals like acetylcholine.
Cellular Health: Supports nervous system, liver, skin, hair, eyes, and red blood cell formation.

Sources


Ubiquitous: Found in almost every food, hence "pantothenic" (from everywhere).
Rich Sources: Meats, eggs, organ meats, whole grains, legumes, broccoli, avocado, sweet potatoes, dairy.
Deficiency & Supplementation
Deficiency: Very rare due to its abundance; can cause fatigue, headaches, and numbness.
Supplementation: Often used in high doses for potential acne, energy, or stress, with forms like calcium pantothenate.
Forms: Dexpanthenol (topical for skin), pantethine (lipid management).
Safety

Water-Soluble: Excess is generally excreted by the kidneys, making toxicity unlikely, though high doses can cause mild gastric upset.