Pantothenic acid, also known as vitamin B5, is the raw material your body uses to make coenzyme A, a molecule involved in hundreds of chemical reactions that keep you alive. It helps convert food into energy, build and break down fats, produce hormones, and maintain healthy skin. The adequate intake for adults is 5 mg per day, and because B5 is found in nearly every food group, true deficiency is rare.
How B5 Powers Your Metabolism
The central job of pantothenic acid is serving as the building block for coenzyme A (CoA). Your body converts B5 through a multi-step process: first phosphorylating it, then combining it with the amino acid cysteine, and finally attaching a molecular tag that completes the CoA structure. This isn’t just biochemical trivia. CoA is the molecule that shuttles fuel into your cells’ energy-producing machinery.
When you eat carbohydrates, fats, or protein, your body breaks them down into smaller units. CoA grabs those units and feeds them into the citric acid cycle, the process inside your mitochondria that generates the energy currency your cells run on. Without adequate pantothenic acid, this entire system slows down. CoA is also essential for beta-oxidation, the specific pathway that breaks stored fat into usable energy. In short, B5 sits at the crossroads of virtually every major energy pathway in your body.
Hormone and Neurotransmitter Production
CoA is required to synthesize cholesterol, which might sound like a bad thing, but cholesterol is the precursor to all steroid hormones, including cortisol, estrogen, testosterone, and progesterone. Animal research has shown this relationship directly: rats supplemented with pantothenic acid had higher baseline levels of corticosterone and progesterone, and their adrenal cells responded more strongly to hormonal signaling than those of unsupplemented controls.
B5 also contributes to the production of acetylcholine, a neurotransmitter critical for muscle contraction, memory, and focus. And because CoA is involved in synthesizing vitamins A and D, pantothenic acid has a quiet hand in immune function and bone health as well.
Skin Healing and Barrier Repair
You’ve probably encountered pantothenic acid in skincare products under the name dexpanthenol (or panthenol). When applied topically, dexpanthenol absorbs into the skin and converts to pantothenic acid, where it supports the normal function of the outermost skin layer. Clinical studies have confirmed that topical dexpanthenol accelerates wound healing by speeding up re-epithelialization, the process by which new skin cells migrate to close a wound. It also strengthens the skin’s moisture barrier by increasing water content in the outer layer and improving the structure of the lipids that hold skin cells together.
For acne specifically, the evidence is more limited but notable. In a study of 100 patients who received 10 g of oral pantothenic acid daily (split into four doses) along with a 20% topical cream, facial oil production dropped within two to three days, and existing breakouts began to subside within two weeks. A separate randomized trial of 41 people with mild to moderate acne found improvements over 12 weeks of supplementation. These doses are far above the normal dietary intake, though, and this remains a niche area of dermatology research rather than standard treatment.
Pantethine and Cholesterol
If you’ve seen claims that B5 lowers cholesterol, there’s an important distinction to understand. Regular pantothenic acid has little to no effect on blood lipids. Pantethine, a related compound that converts to CoA through a shorter pathway, is the form with lipid-lowering activity. At a standard dosage of 900 mg per day, pantethine has been shown to reduce triglycerides by about 32%, total cholesterol by 19%, and LDL cholesterol by 21%, while raising HDL cholesterol by roughly 23%. It works by slowing cholesterol production and accelerating fat breakdown in the mitochondria. These are not interchangeable supplements, so if cardiovascular health is your goal, plain vitamin B5 won’t deliver those results.
What Deficiency Looks Like
Because pantothenic acid is present in such a wide range of foods (the name itself comes from the Greek word “pantos,” meaning everywhere), isolated B5 deficiency is extremely uncommon outside of severe malnutrition. When it has been observed, historically in prisoners of war and in experimental settings, symptoms include fatigue, irritability, numbness and tingling in the hands and feet, and a burning sensation in the feet sometimes called “burning feet syndrome.” These neurological symptoms make sense given B5’s role in nerve-supporting compounds like acetylcholine and in the energy metabolism that nerve cells depend on heavily.
Best Food Sources
Meeting the 5 mg daily target is straightforward with a varied diet. Sunflower seeds are among the richest sources, with a cup of toasted kernels providing over 9 mg. A cup of cooked dark-meat chicken supplies about 1.8 mg, and a cup of sliced grilled portabella mushrooms provides around 1.5 mg. Other solid sources include peanuts (about 1.5 mg per cup dry-roasted), trout (1.4 mg per fillet), black beans, corn, and brown rice flour. Even trail mix with chocolate chips and nuts delivers about 1.4 mg per cup. Organ meats, eggs, and dairy products like feta cheese also contribute meaningful amounts.
Because B5 is water-soluble, significant amounts can be lost during cooking, especially boiling. Roasting, grilling, or eating foods raw preserves more of the vitamin.
Safety and Supplementation
No tolerable upper intake level has been established for pantothenic acid because toxicity is essentially unreported. The vitamin is water-soluble, so excess amounts are excreted in urine rather than stored. Even in studies using doses of 10 g per day for acne treatment, serious adverse effects were not a major concern. That said, very high doses can cause digestive discomfort, including diarrhea. Most multivitamins contain 5 to 10 mg, which comfortably covers the adequate intake without approaching the gram-level doses used in specialized research. Pregnant and breastfeeding women have slightly higher needs at 6 mg and 7 mg per day, respectively.