Symptoms of Low Vitamin B5 (Pantothenic Acid): Causes & Treatment
Deficiency
Symptoms & causes
Vitamin B5 (pantothenic acid) deficiency is extraordinarily rare because it is found in virtually every food — its name literally means 'from everywhere' in Greek; frank deficiency only occurs in severe malnutrition or with a rare genetic enzyme mutation.
Pantothenic acid, or vitamin B5, is an essential nutrient that your body needs to make coenzyme A, a molecule critical for breaking down fats and generating energy. Because B5 is present in almost every food, a true dietary deficiency is virtually unheard of outside of severe starvation or a rare genetic disorder. This page explains the real, documented symptoms of B5 deficiency, why you almost certainly don't have it, and the few situations where it actually matters.
This is general nutrition and wellness information, not medical advice. If you're on a weight-loss medication or managing a health condition, confirm specifics with your clinician.
Symptoms of low Vitamin B5 (pantothenic acid) — an essential water-soluble B vitamin; a component of coenzyme A (CoA), required for fatty acid metabolism, the citric acid cycle (energy production), synthesis of acetylcholine, steroid hormones, vitamin D, and heme. Also required for proper skin, hair, and nail function.
Everyday signs are on the left; the ones on the right mean it's time to check in with a clinician.
Everyday signs
Common symptoms
- Fatigue and malaise
- Headache
- Personality changes (irritability)
- Numbness and paresthesia (tingling) of the hands and feet
- Muscle cramps
- Nausea and abdominal cramps
Don't wait
See a doctor if
- Neurological symptoms — burning feet syndrome (peripheral neuropathy) associated with severe B5 depletion
- Symptoms of broad malnutrition (multiple concurrent nutrient deficiencies)
Who is most likely to run low
Some people are more prone to falling short than others — including many people on a weight-loss journey who are simply eating less.
- People with severe malnutrition (famine conditions, eating disorders, extreme alcoholism)
- Individuals with the PANK2 gene mutation (PKAN) — a very rare inherited neurological condition
- No significant risk in the general population, including vegans or people on calorie-restricted diets
What causes low Vitamin B5 (pantothenic acid) — an essential water-soluble B vitamin; a component of coenzyme A (CoA), required for fatty acid metabolism, the citric acid cycle (energy production), synthesis of acetylcholine, steroid hormones, vitamin D, and heme. Also required for proper skin, hair, and nail function.
- Severe malnutrition (the only realistic cause in the general population — B5 is in virtually all food)
- PANK2 gene mutation — causes pantothenate kinase-associated neurodegeneration (PKAN), a rare genetic disorder of B5 metabolism, not dietary deficiency
- Historically reproduced experimentally using a B5-specific antagonist (omega-methyl pantothenic acid)
How low levels are diagnosed
No reliable biomarker in routine clinical use; urinary pantothenate excretion reflects intake; diagnosis is usually clinical in the context of known malnutrition. Blood pantothenate can be measured in specialized labs.
How it's corrected
Most gaps close with food first, and supplementation when a clinician recommends it.
Pantothenic acid is present in nearly all foods — organ meats (liver, kidney), sunflower seeds, fish (trout, tuna, salmon), shellfish, eggs, milk, avocados, mushrooms, sweet potatoes, legumes, broccoli, whole grains. Calcium pantothenate tablets are the common supplement form; RDA-level supplementation is easily achieved via B-complex vitamins. PKAN is treated with pantothenate kinase activators under specialist care — not off-the-shelf B5 supplements.
How to keep levels up
Not practically necessary given the ubiquity of B5 in food. Adequate Intake (AI): 5 mg/day for adults; 6 mg during pregnancy, 7 mg during lactation (NIH ODS).
When to see a clinician
For peripheral neuropathy, burning feet, or symptoms of broad malnutrition — these require medical evaluation, not self-treatment with B5 supplements.
Why 'Symptoms of Low B5' Is Almost Certainly Not What You Have
If you're searching for the symptoms of low vitamin B5, the most honest first answer is this: you almost certainly don't have them. Pantothenic acid's name comes from the Greek 'pantothen,' meaning 'from everywhere,' and it lives up to the name—this vitamin is present in virtually every food you eat.
The symptom lists you'll find online—fatigue, irritability, numbness, tingling, and burning feet—are real, but they come from a very specific context. Researchers in the mid-20th century produced these symptoms by giving human volunteers a chemical antagonist called omega-methyl pantothenic acid, which actively blocks the body's ability to use B5. They didn't produce it by simply putting people on a low-B5 diet.
In the real world, outside of a laboratory or a famine zone, your body gets all the pantothenic acid it needs without you ever thinking about it. A single serving of sunflower seeds, an egg, or a portion of salmon can cover your entire daily Adequate Intake. Even highly processed diets contain enough B5 to prevent the clinical syndrome. If you are experiencing fatigue, brain fog, or tingling, the cause is almost certainly something else—and chasing a B5 deficiency is likely to delay finding the real answer.
Bottom line
If you eat food—any food—you are almost certainly getting adequate pantothenic acid. The symptoms described in the literature come from deliberately blocking B5 absorption in research settings, not from ordinary diet variation.
What Pantothenic Acid Actually Does—And Why Its Absence Matters Even If It's Rare
Vitamin B5's central job in your body is to form coenzyme A (CoA), a molecule so fundamental to life that it's involved in hundreds of chemical reactions. CoA is essential for breaking down fats and carbohydrates into energy via the Krebs cycle, synthesizing steroid hormones like cortisol and sex hormones, producing the neurotransmitter acetylcholine, and building heme for your red blood cells.
This metabolic breadth explains why deliberately blocking B5 in a lab produces such a wide range of symptoms—fatigue from impaired energy production, neurological symptoms from disrupted neurotransmitter synthesis, and skin issues from faulty fatty acid metabolism. But this same ubiquity of function is precisely why dietary deficiency is almost impossible to produce. Your body needs CoA so badly that B5 is woven into the fabric of the food supply.
The one clinical context where B5 metabolism genuinely fails is pantothenate kinase-associated neurodegeneration, or PKAN. This is a rare inherited disorder caused by a mutation in the PANK2 gene, which codes for the enzyme that starts the process of converting B5 into CoA. In PKAN, the problem isn't a lack of dietary B5—it's that the cellular machinery to use it is broken. This distinction is critical: PKAN patients have plenty of B5 in their blood, but their brains can't use it, leading to progressive movement disorders and cognitive decline. It is not a condition you can prevent or treat with a B5 supplement from the health food store.
Bottom line
B5's metabolic role is broad and essential, but this breadth is precisely why deficiency is almost impossible to produce through ordinary diet. The one serious B5-related illness, PKAN, is a genetic disorder of B5 utilization, not a dietary deficiency.
The Burning Feet Syndrome: B5 Deficiency's Most Distinctive—and Rare—Sign
If there is one symptom that historically put B5 deficiency on the map, it's 'burning feet syndrome.' During World War II, Allied prisoners of war in camps across Asia and the Pacific developed a distinctive condition: intense, searing pain in the soles of their feet, often worse at night, accompanied by numbness and tingling. The pain was so severe that some men could not bear the weight of a bedsheet on their feet.
Initially, the syndrome was attributed to a deficiency of thiamine (vitamin B1) or niacin (B3), both of which were known to cause neurological problems in severe deficiency. But researchers noticed that burning feet syndrome didn't respond well to thiamine or niacin alone. It did, however, improve when patients were given pantothenic acid or, more reliably, when they were simply fed a complete diet again. This suggested that B5 played a role, likely in combination with other B vitamins.
The key context here is the degree of deprivation required. These were individuals suffering from months of near-starvation, often subsisting on little more than polished white rice. In modern, food-secure populations, this syndrome is essentially nonexistent. If you are experiencing burning or tingling in your feet today, the differential diagnosis is long and includes diabetes, alcohol use disorder, chemotherapy side effects, and autoimmune conditions—but isolated B5 deficiency is at the very bottom of the list.
Bottom line
Burning feet syndrome is historically interesting but clinically obsolete in high-income, food-secure populations. It requires months of near-total dietary restriction to develop and is not a realistic concern for anyone eating a normal diet.
B5 and Skin Health: What the Supplement Marketing Gets Right and Wrong
Walk down the skincare aisle and you'll see pantothenic acid or its derivative, dexpanthenol, listed on everything from moisturizers to acne treatments. There is a kernel of real science here. Coenzyme A is required for the synthesis of fatty acids and sphingolipids, which are critical components of your skin's outer barrier. When that barrier is compromised, skin loses water and becomes vulnerable to irritation and infection.
Topical dexpanthenol, also called provitamin B5, has a decent body of evidence supporting its use in wound healing and skin barrier repair. When applied to the skin, it is converted to pantothenic acid and then to CoA, supporting the regeneration of damaged tissue. This is why you'll find it in many post-procedure creams and diaper rash ointments. The evidence for oral B5 and acne is shakier. A handful of small studies from the 1990s suggested that very high doses—several grams per day—could reduce acne lesions, possibly by altering the composition of skin oils. But these studies lacked the rigor of modern randomized controlled trials, and no large replication has been published.
The supplement industry has extrapolated wildly from this thin evidence, marketing B5 as a cure for acne, hair loss, and aging skin. The honest read: topical dexpanthenol is a legitimate skincare ingredient with real, if modest, benefits. Oral B5 for acne is an unproven, high-dose experiment. And in neither case is the benefit about correcting a deficiency—it's about pushing a metabolic pathway pharmacologically.
Bottom line
Topical dexpanthenol (provitamin B5) has decent evidence for skin healing. Oral B5 for acne has minimal rigorous evidence. You are not deficient in B5 if you have acne.
GLP-1 Users: Does Eating Less Threaten Your B5 Status?
If you're taking a GLP-1 medication like semaglutide or tirzepatide, you're eating less—sometimes a lot less. That raises legitimate questions about micronutrient adequacy, and many clinicians rightly recommend a broad-spectrum multivitamin as a safety net. But when it comes to pantothenic acid specifically, you can breathe easy.
B5 is the one B vitamin you can confidently de-prioritize when thinking about nutrient gaps on a reduced-calorie diet. The Adequate Intake is only 5 mg per day, and even a small, varied diet easily surpasses this. A single egg contains about 0.7 mg. A half-cup of mushrooms has 0.5 mg. A 3-ounce portion of salmon delivers over 1 mg. If you're eating even a modest variety of real foods, you're covered. The nutrients that genuinely deserve your attention on GLP-1 therapy are protein, choline, vitamin D, riboflavin, and iron—nutrients where real at-risk populations exist and where reduced intake can tip you into insufficiency.
If you and your clinician decide a supplement is warranted, a standard B-complex will cover B5 alongside the other B vitamins that matter more. There is no need for a standalone B5 supplement, and products marketed specifically for 'B5 deficiency' on a GLP-1 diet are solving a problem that doesn't exist.
Bottom line
B5 is the one B vitamin you can confidently de-prioritize when counseling GLP-1 users on micronutrient gaps. Focus instead on protein, choline, vitamin D, riboflavin, and iron, where real at-risk populations exist.
What most pages leave out
Many 'low B5 symptoms' pages invent elaborate symptom lists (fatigue, brain fog, hair loss, hormone imbalance) and sell B5 supplements. The honest position: experimental deficiency produces those symptoms only under extreme conditions. Real B5 deficiency in the 21st century is essentially limited to famine and a rare genetic disease. Competitors bury this; this page leads with it.
We flag this so you can make an informed choice — not to scare you off.
❓Frequently Asked Questions
Documented symptoms include fatigue, headache, numbness and tingling in the hands and feet, muscle cramps, nausea, and irritability. However, these have only been observed in experimental settings where B5 was deliberately blocked, or in cases of severe, prolonged malnutrition. Ordinary dietary variation will not cause them.
Extremely rare. Frank dietary B5 deficiency has not been documented in otherwise healthy people eating a normal diet in any major population study. Even highly restricted diets typically provide adequate amounts because the vitamin is present in nearly every food.
Beef liver, sunflower seeds, salmon, trout, avocados, mushrooms, sweet potatoes, eggs, and whole grains are all excellent sources. It's also commonly added to fortified breakfast cereals, making it even harder to miss in a standard diet.
Some small, older studies suggest high-dose oral B5 supplementation may reduce acne lesions, but the evidence is limited and not considered rigorous by modern standards. Topical dexpanthenol, a form of B5, has better evidence for wound healing and skin barrier repair. Using B5 for acne is a pharmacological application, not a correction of a deficiency.
There is no official Recommended Dietary Allowance (RDA) for pantothenic acid. Instead, the National Institutes of Health has set an Adequate Intake (AI) of 5 mg per day for adults. This amount is easily met by virtually any diet that includes food.
Hair loss can appear in the context of severe, multi-nutrient malnutrition, but isolated B5 deficiency causing hair loss has not been demonstrated in healthy humans. If you are experiencing hair loss, it is far more likely to be related to iron status, thyroid function, genetics, or other factors.
PKAN is a rare, inherited genetic disorder caused by a mutation in the PANK2 gene. This mutation impairs the body's ability to use vitamin B5 properly, leading to a progressive neurological disease. It is a disorder of B5 metabolism, not a dietary deficiency, and cannot be treated with over-the-counter B5 supplements.
Almost certainly not for the purpose of preventing a deficiency. Your diet almost certainly provides enough. If you are considering high-dose B5 for a specific condition like acne, discuss it with a clinician, as the evidence is mixed and high doses can sometimes cause mild diarrhea.
Medically reviewed by
Chet Tharpe, MDBoard-certified physician
Last reviewed July 2026
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This content is for general informational purposes only and is not medical or nutritional advice, a diagnosis, or a substitute for professional judgment. It does not account for your health, medications, or goals, and nutrition information changes over time. Always talk with a qualified clinician or dietitian before making significant changes to your diet, supplements, or medications. Curex offers compounded GLP-1 medications through licensed clinicians and does not sell or endorse the food or supplement reviewed on this page.