Benefits
Supports Energy Metabolism
Pantothenic acid is part of coenzyme A, which the body uses to turn carbohydrates, fats, and proteins into energy. This is well established biochemistry, but none of the studies cited on this page tested whether extra B5 increases energy in people who already get enough from food. A review of B vitamins and the brain (Kennedy 2016) concluded that supplementing single B vitamins in well-nourished people produces little measurable benefit.
Studied for Mild Acne in One Small Trial
One randomized, double-blind, placebo-controlled trial (Yang 2014, PMID 24831048) tested a pantothenic acid-based dietary supplement, meaning a multi-ingredient formulation rather than plain B5, in people with mild to moderate facial acne. Forty-eight people enrolled and 41 were evaluable, and after 12 weeks total facial lesion count dropped more than with placebo (P=0.0197). That is one small, short study of a formulation, and the published abstract does not state the B5 dose, so the widely quoted 2.2 g/day figure should be treated as approximate. Nothing cited here shows a benefit for hair. Dexpanthenol (the alcohol form of B5) is used in creams such as Bepanthen for wound healing and skin barrier support, but that is a product applied to the skin and says nothing about what an oral B5 capsule does. Note: standard acne therapies (topical retinoids, benzoyl peroxide, antibiotics, isotretinoin) have substantially stronger evidence; B5 may be an adjunct for mild cases.
Aids Hormone and Cholesterol Synthesis
Coenzyme A is required for the body to make steroid hormones such as cortisol and testosterone, and to make cholesterol. This is basic biochemistry that applies to anyone eating a normal diet. No study cited on this page shows that taking extra B5 changes hormone or cholesterol levels.
Supports Nervous System Function
Pantothenic acid, through coenzyme A, is involved in making acetylcholine, a neurotransmitter used in nerve signaling. No trial cited on this page tested B5 supplements for memory, thinking, or nerve function in people.
Marketed for Stress, But Not Tested for It
B5 is often sold as an adrenal support or anti-stress nutrient because coenzyme A is needed to make adrenal hormones. No human trial cited on this page tested pantothenic acid for stress, mood, or cortisol, so treat this as a marketing idea rather than a documented effect.
Supports Red Blood Cell Production
Coenzyme A made from pantothenic acid supplies succinyl-CoA, one of the building blocks the body uses to make heme for hemoglobin. That is textbook biochemistry in people who get enough B5; no study cited here tested whether supplements improve blood counts or oxygen transport.
Mechanism of action
Precursor to Coenzyme A (CoA)
Pantothenic acid is converted into coenzyme A, a critical molecule in energy metabolism. CoA acts as a carrier of acyl groups in enzymatic reactions, facilitating the metabolism of carbohydrates, fats, and proteins. In the citric acid cycle, CoA (as acetyl-CoA) delivers acetyl groups to produce ATP, the cell’s energy currency. CoA is also involved in fatty acid synthesis and oxidation, supporting lipid metabolism.
Role in Acyl Carrier Protein (ACP)
Pantothenic acid is a component of ACP, which is essential for fatty acid synthesis in mitochondria and cytosol, contributing to cell membrane formation and lipid storage.
Hormone and Cholesterol Synthesis
CoA is required for synthesizing steroid hormones (e.g., cortisol, testosterone) and cholesterol in the adrenal glands and other tissues, supporting endocrine function.
Neurotransmitter Production
Pantothenic acid, via CoA, supports the synthesis of acetylcholine, a neurotransmitter crucial for nerve signaling, muscle function, and cognitive processes.
Cellular Repair and Skin Health
Through its role in lipid and protein metabolism, pantothenic acid supports cell membrane integrity and tissue repair. Its derivative, dexpanthenol, is applied to the skin in creams to support healing, which is a topical effect that does not carry over to swallowing a B5 capsule.
Clinical trials
2014 randomized, double-blind, placebo-controlled trial (PMID 24831048) in adults with mild to moderate acne, testing a multi-ingredient pantothenic acid-based dietary supplement, not plain vitamin B5, against placebo for 12 weeks. This study is not listed in the references section of this page.
Adults with mild-moderate acne.
Yang M, Moclair B, Hatcher V et al. 2014 (Dermatol Ther 4(1):93-101, PMID 24831048). Randomized, double-blind, placebo-controlled study; 48 adults with mild to moderate facial acne enrolled and 41 were evaluable, 12 weeks, using a pantothenic acid-based supplement, which is a formulation rather than pure B5. Result: total facial lesion count fell more than with placebo (P=0.0197). Well tolerated. Limits: one small, short trial, and the published abstract does not state the B5 dose, so the commonly quoted 2.2 g/day is not confirmed there; if accurate it would be about 440 times the 5 mg/day adequate intake. Caveat: standard acne management uses topical retinoids (tretinoin, adapalene), benzoyl peroxide, topical/oral antibiotics, and isotretinoin (Accutane) for severe acne — all with much stronger evidence. May be adjunctive for mild cases.
2015 double-blind trial in 216 adults with high cholesterol comparing 400 mg/day coenzyme A with pantethine. Important: both are different compounds from pantothenic acid, and this study is not among the references listed on this page.
216 dyslipidemic adults.
Both coenzyme A and pantethine lowered blood lipids, with broadly comparable results. This was run in people already diagnosed with high cholesterol, so it does not describe what a healthy person should expect, and neither compound tested is pantothenic acid. No PMID is given for this study on this page, so it should not be counted as evidence for B5. Cholesterol treatment decisions belong with a doctor.
Clinical study comparing dexpanthenol (an alcoholic analog of pantothenic acid) with hydrocortisone for treating atopic dermatitis.
Atopic dermatitis patients.
Dexpanthenol cream modestly improved skin barrier function and symptoms in people with diagnosed atopic dermatitis. This was a cream applied to the skin in people with a skin condition, so it tells you nothing about taking B5 by mouth. Note: dexpanthenol is an established topical ingredient (Bepanthen®, others) for skin barrier support; less potent than topical corticosteroids for inflammation but useful for maintenance.
2020 study exploring cerebral pantothenic acid deficiency in Alzheimer's disease patients, using biochemical analysis of post-mortem brain tissue.
Post-mortem AD vs control brains.
AD brain tissue showed reduced pantothenic acid levels in specific regions. Critical caveat: this is a mechanistic finding in post-mortem tissue — does not establish that pantothenic acid supplementation prevents or treats AD. Tempting hypothesis for future research but not clinical evidence.