Vitamin B5 (Pantothenic Acid) Deficiency: Signs You're Not Getting Enough

Vitamin B5, or pantothenic acid, is named from the Greek word "pantos" meaning "everywhere"—because it's found in virtually all foods. This makes outright deficiency rare, but subclinical insufficiency can still occur, especially under conditions of high metabolic demand, chronic stress, or restrictive dieting.

Quick answer

B5 deficiency causes fatigue, irritability, burning or tingling feet, insomnia, and digestive disturbances. It's uncommon with a normal diet but can develop with severe caloric restriction, alcoholism, or very high stress. Supplementation with 100-500mg of pantothenic acid or pantethine effectively corrects insufficiency.

Why B5 matters

Pantothenic acid is the precursor to coenzyme A (CoA), one of the most important molecules in metabolism. CoA participates in over 100 metabolic pathways including:

• Energy production: CoA is required for the citric acid cycle (Krebs cycle), converting fats, carbohydrates, and proteins into ATP
• Fatty acid synthesis and oxidation: Essential for both building and burning fats
• Steroid hormone synthesis: Cortisol, DHEA, testosterone, and estrogen all require CoA
• Acetylcholine production: This neurotransmitter depends on acetyl-CoA for synthesis
• Melatonin synthesis: The acetylation step in melatonin production requires CoA

Symptoms of B5 insufficiency

The "burning feet" hallmark

The most distinctive B5 deficiency symptom is paresthesia of the feet—a burning, tingling sensation, especially at night. This was first identified in malnourished prisoners of war. While dramatic, it's a late-stage sign.

Earlier, subtler signs

• Fatigue and low energy despite adequate sleep
• Irritability and restlessness
• Insomnia or disrupted sleep patterns
• Digestive issues: nausea, abdominal cramps, vomiting
• Increased susceptibility to infections due to impaired antibody production
• Muscle cramps and stiffness
• Numbness or tingling in hands and feet
• Impaired wound healing

Adrenal connection

B5 is sometimes called the "anti-stress vitamin" because CoA is essential for adrenal hormone production. Under chronic stress, cortisol production increases dramatically, and B5 demand rises accordingly. People under sustained high stress may deplete B5 faster than they replace it, contributing to adrenal fatigue symptoms.

Who's at risk

• People on very low-calorie diets (under 1,200 calories/day)
• Chronic heavy alcohol users (alcohol impairs B5 absorption and increases excretion)
• People with inflammatory bowel disease (impaired absorption)
• Those under chronic high stress (increased cortisol production burns through CoA)
• Athletes in heavy training (increased metabolic demand)
• Diabetics (altered B5 metabolism has been documented)

Food sources

Because B5 is in nearly all foods, eating a varied diet usually provides adequate amounts. The richest sources include:

• Liver and organ meats (highest concentration)
• Chicken and beef
• Eggs (especially the yolk)
• Avocado
• Mushrooms (shiitake, portobello)
• Sweet potatoes
• Lentils and split peas
• Sunflower seeds

The RDA is just 5mg/day for adults, which is easily achieved through food alone.

Supplementation

Forms

Pantothenic acid (calcium pantothenate): The standard supplement form. Well-absorbed, inexpensive, and effective for correcting deficiency.

Pantethine: The active form, already closer to CoA in the metabolic pathway. Better studied for cholesterol reduction (typically 600-900mg/day in divided doses). More expensive than pantothenic acid.

Dexpanthenol: The alcohol form, primarily used topically for wound healing (found in many skin creams).

Dosing

| Goal | Dose | |------|------| | General health maintenance | 5-10mg/day (from diet) | | Stress support | 100-250mg/day | | Acne management | 500-1,000mg/day | | Lipid support (pantethine) | 300mg three times daily |

B5 for acne

High-dose pantothenic acid (500-1,000mg/day) has been used for acne based on the theory that increased CoA availability improves fatty acid metabolism in the skin, reducing sebum production. The evidence is limited but some people report significant improvement. Pantethine may be more effective than pantothenic acid for this purpose.

Safety profile

B5 is water-soluble with very low toxicity. Doses up to 10,000mg/day have been used in studies without serious adverse effects. The main side effect at high doses is diarrhea and GI distress.

No known drug interactions at standard supplemental doses, making B5 one of the safest supplements available.

Timing and absorption

B5 is well-absorbed from the gut (about 50% at normal dietary intakes, decreasing at very high supplemental doses). It can be taken with or without food. For stress support, splitting the dose (morning and afternoon) may provide more sustained benefit than a single large dose.

Bottom line

True B5 deficiency is rare, but subclinical insufficiency can contribute to fatigue, poor stress resilience, burning feet, and sleep disruption. If you're under chronic stress, eating a restrictive diet, or training heavily, supplementing with 100-500mg of pantothenic acid provides a safe, inexpensive insurance policy for a nutrient your adrenals and mitochondria depend on.

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