Pantothenic acid is a member of the B-vitamin family, universally present in living cells and named from the Greek 'pantothen,' meaning 'from everywhere,' reflecting its wide distribution in foods. It serves as the precursor to coenzyme A (CoA) and the acyl carrier protein, making it central to carbohydrate, fat, and protein metabolism. Unlike some nutrients with narrow roles, B5 participates in over 100 enzymatic reactions, including the citric acid cycle, fatty acid oxidation, and synthesis of steroid hormones, neurotransmitters, and hemoglobin.

Once absorbed, pantothenic acid is phosphorylated and incorporated into coenzyme A (CoA), the key molecule that activates acetyl groups for entry into the Krebs cycle and enables acetylation reactions throughout the body. CoA is also required for the synthesis of cholesterol, steroid hormones (cortisol, sex hormones), and acetylcholine, explaining B5's broad physiological relevance. Its derivative dexpanthenol (provitamin B5) is converted back to pantothenic acid in skin tissue, where it promotes keratinocyte proliferation and supports barrier repair — the basis for its topical wound-healing and moisturizing applications.

Oral supplements are most commonly available as calcium pantothenate in capsule or tablet form, typically ranging from 250mg to 1000mg per dose. Powder forms allow flexible dosing and are popular in high-dose acne protocols. Topical dexpanthenol (commonly branded as Bepanthen or Panthoderm) is widely used in dermatology for wound healing and eczema. Pantethine is available as a separate oral supplement for lipid management. IV dexpanthenol is used in clinical settings for post-surgical paralytic ileus.

• Acne
• Wound Healing & Skin Repair
• Energy & Fatigue
• Adrenal Support
• Lipid Management (as Pantethine)
• Nutritional Deficiency

• Pantothenic acid deficiency (well-established; adequate dietary intake or supplementation prevents the rare but documented deficiency syndrome including burning feet syndrome and adrenal insufficiency)
• Post-procedure skin breakdown (topical dexpanthenol has controlled evidence supporting prevention of irritant contact dermatitis and skin barrier disruption in clinical dermatology settings)

• Beef liver and chicken liver — Organ meats are among the most concentrated natural sources of pantothenic acid, with beef liver providing approximately 8–10mg per 100g serving — well above the 5mg adult RDA in a single serving.
• Sunflower seeds — Sunflower seeds provide roughly 7mg of pantothenic acid per 100g, making them one of the richest plant-based sources and a practical daily addition to the diet.
• Shiitake mushrooms — Cooked shiitake mushrooms contain approximately 3.6mg per 100g of pantothenic acid and are one of the best fungal food sources, with excellent bioavailability from the cooked form.
• Avocado — A whole avocado provides approximately 2–3mg of pantothenic acid along with healthy fats that support CoA-dependent fat metabolism, making it a practical and nutrient-dense daily source.
• Eggs (whole) — Two large eggs provide approximately 1.6mg of pantothenic acid, and as a complete food with fat and protein, support broader B5-dependent metabolic processes including steroid hormone synthesis.

• Diarrhea and loose stools (most commonly reported at doses exceeding 10g/day in high-dose acne protocols)
• Nausea and mild gastrointestinal discomfort at high doses
• Rare reports of mild skin reactions with topical dexpanthenol (contact sensitization, though this is uncommon)
• Increased urinary frequency (minor, reflects water-soluble excretion of excess B5)

• Recommended daily: Adequate Intake (AI): 5mg/day for adults (men and women). Therapeutic doses vary by indication: 2.2g/day (pantothenic acid) for acne studied in RCT; 600–900mg/day (pantethine) for lipid management; 5% topical dexpanthenol for wound healing and skin repair. High-dose acne protocols have used up to 10g/day but GI tolerance should be monitored.
• Best time of day: Oral supplements are best taken in the morning or with meals. High-dose protocols may be split into 2–4 divided doses throughout the day to minimize GI load and maintain steady CoA precursor availability.
• With or without food: Take with food to improve tolerability, particularly at higher doses. Food also ensures co-presence of other B vitamins that support B5's metabolic functions.
• Time to effect: Deficiency correction: days to 1–2 weeks. Acne improvement: 8–12 weeks of consistent supplementation. Lipid changes with pantethine: 12–16 weeks. Topical wound healing: 1–3 weeks depending on wound severity.
• How long to take it: For general nutritional support, ongoing daily intake at AI levels (5mg) from diet or a B-complex supplement is appropriate without cycling. For therapeutic high-dose use (acne, lipid management), a defined treatment period of 12–16 weeks followed by reassessment is advisable. Long-term high-dose supplementation beyond 6 months should be supervised.