Vitamin B5 (Pantothenic Acid): CoA, Hormones, and Skin Health

Vitamin B5 (pantothenic acid) is named from the Greek word "pantos," meaning everywhere, because it is found in virtually all foods. Despite its ubiquity, B5 has specific therapeutic applications, particularly for cholesterol management (as pantethine) and acne reduction at high doses. Its core function is forming Coenzyme A, one of the most important molecules in metabolism.

Quick answer

Pantothenic acid is essential for Coenzyme A synthesis, which drives fatty acid metabolism, hormone production, and energy generation. The RDA is 5 mg, but therapeutic doses of 500 mg to 10 g are used for acne and adrenal support. Pantethine (300 mg 3x/day) modestly improves cholesterol.

How B5 works

Pantothenic acid is converted to Coenzyme A (CoA) through a five-step enzymatic process. CoA participates in:

• Fatty acid synthesis and oxidation — CoA carries acetyl groups into and out of the citric acid cycle
• Citric acid cycle — acetyl-CoA is the entry point for energy production
• Steroid hormone synthesis — cortisol, testosterone, estrogen, and DHEA all require CoA
• Acetylcholine production — the neurotransmitter for memory and muscle control requires acetyl-CoA
• Melatonin synthesis — acetylation of serotonin to form melatonin uses CoA

Key benefits

Cholesterol management

Pantethine (the active form, not pantothenic acid) at 900 mg/day has shown:

• LDL reduction of 10-15%
• Triglyceride reduction of 10-30%
• Modest HDL increase
• Works by inhibiting hepatic acetyl-CoA carboxylase and HMG-CoA reductase

Acne reduction

High-dose pantothenic acid (5-10 g/day) was proposed by Dr. Lit-Hung Leung to reduce acne by enhancing fatty acid metabolism and reducing sebum production. The theory is that CoA prioritizes fatty acid breakdown, leaving less substrate for sebaceous glands. Evidence is mostly anecdotal and from small studies, but many users report improvement.

Adrenal and stress support

B5 is concentrated in the adrenal glands and is essential for cortisol production. It is often called the "anti-stress vitamin." Supplementation may support adrenal function during prolonged stress, though rigorous human trials are limited.

Wound healing

Pantothenic acid supports wound healing by promoting cell proliferation and collagen synthesis. Topical dexpanthenol (provitamin B5) is widely used in wound care and skincare products.

Deficiency

True B5 deficiency is rare because the vitamin is widespread in food. When it occurs (usually in severe malnutrition), symptoms include:

• Fatigue and irritability
• Numbness and tingling in hands and feet ("burning feet syndrome")
• Headache and insomnia
• GI disturbances

Dosing guidelines

| Purpose | Dose | |---|---| | RDA (adults) | 5 mg | | General supplement | 100-500 mg | | Cholesterol (pantethine) | 300 mg, 3x/day | | Acne (anecdotal) | 2-10 g/day, divided | | Adrenal support | 500-1500 mg |

Safety: Pantothenic acid is very well tolerated. High doses (10+ g) may cause diarrhea. Pantethine has a stronger safety profile at therapeutic doses than pantothenic acid for cholesterol.

Best forms

• Calcium D-pantothenate — standard supplemental form, well absorbed
• Pantethine — active metabolite, preferred for cholesterol benefits
• Dexpanthenol — provitamin B5 for topical use (wound healing, skin)

FAQ

Does B5 really help acne?

The evidence is preliminary but promising. High doses (2-10 g/day) may help some people, likely by enhancing fatty acid metabolism. Start with 1-2 g and increase gradually. GI upset is the main side effect at high doses.

What is the difference between pantothenic acid and pantethine?

Pantothenic acid is the basic vitamin form. Pantethine is further along the CoA synthesis pathway and has demonstrated cholesterol-lowering effects that plain pantothenic acid does not share.

Can B5 help with hair loss?

Dexpanthenol is included in many hair care products and may improve hair thickness and manageability. However, oral B5 for hair loss lacks strong clinical evidence unless a deficiency exists.

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• Adrenal Fatigue Supplements: Evidence Review
• CoQ10 Benefits and Dosage Guide

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