Know2eat

Pantothenic acid (vitamin B5)

Vitamins

What pantothenic acid (vitamin b5) may help with

Ranked by how strong the human evidence is — best supported first.

Best supportedBlood lipid profileLimited evidence· 4 sources

Then, in order

4 things to know first — allergies, interactions and limits

About Pantothenic acid (vitamin B5)

A water-soluble B vitamin and the building block of coenzyme A, required by every cell for fatty-acid and energy metabolism. Its name comes from the Greek for "from everywhere", because it is present in nearly all foods.

Pantothenic acid deficiency is essentially unknown outside experimental starvation studies and severe general malnutrition, which makes it one of the least useful vitamins to supplement and one of the most pointless entries in most B-complex products. Its supplement market rests on two things: the "adrenal support" concept, which has no clinical evidence behind it, and gram-dose pantothenic acid for acne, which rests on a small number of trials — one reasonably conducted, none large — and uses doses hundreds of times the Adequate Intake.

Sold as
Calcium pantothenate tablet, Capsule, Pantethine (a derivative), Component of B-complex, Topical dexpanthenol
Also known as
Vitamin B5, Calcium pantothenate, Pantothenate, Dexpanthenol

Regulation: No Tolerable Upper Intake Level has been set — the IOM found no evidence of toxicity from oral intake. Sold as a dietary supplement with no pre-market efficacy review. "Adrenal fatigue", the concept most often used to sell it, is not a recognised medical diagnosis.

What the research used

The amounts, forms and durations published trials of Pantothenic acid (vitamin B5) actually administered.

These are the amounts published trials administered — not a recommendation, and not a dose to copy. Trial participants were screened, supervised and given a characterised preparation. What is in a retail bottle is frequently not what was studied, and the amount that suits one person is not general advice.

  • Studied for Adequate Intake, adults

    5 mg

    Moderate

    An Adequate Intake rather than an RDA, because there was not enough data to establish a requirement. Ordinary diets comfortably exceed it.

  • Studied for Acne trials

    2200 mg

    Limited

    Pantothenic acid, divided doses · 12 weeks

    From a small randomised trial reporting fewer inflammatory lesions. The dose is roughly 440 times the Adequate Intake and the evidence base is one modest trial plus uncontrolled reports.

  • Studied for Pantethine for blood lipids

    600–900 mg

    Limited

    Pantethine, divided doses · 8–16 weeks

    Pantethine is a different compound from pantothenic acid and the lipid trials do not transfer to it. Studies are small and several were industry-supported.

This is general information about food, not medical advice. It cannot diagnose, treat or replace guidance from a clinician who knows your history.

When it was taken

Each window says whether a trial compared it against an alternative, or whether it is convention and pharmacology. Most timing advice is the second kind.

None of the timings below were directly compared in a trial. They reflect how the research happened to dose, or what the pharmacology implies — which is not the same as a timing being better.

  • Morning

    Not enough

    Taken in the morning by convention along with other B vitamins. No trial has compared timings.

    Timing was not directly compared. This reflects convention or how the compound behaves in the body, not a trial showing this window works better.

The evidence in depth

Best supported: Limited

What each association actually rests on, and the papers behind it. A rating describes the state of the research, not how promising the supplement sounds. How we rate evidence.

Blood lipid profile

Heart Health
Limited evidence

Pantethine, a derivative rather than pantothenic acid itself, lowered LDL cholesterol modestly in small trials. The studies are small, several were funded by manufacturers, and ordinary vitamin B5 does not do this.

Limited evidence. Early human work, or mostly lab and animal research.

View the 4 sources

Deep research mode adds each paper’s own conclusion and stated limitations.

Skin structure and hydration

Skin Health
Not enough evidence

One small randomised trial reported fewer inflammatory acne lesions with high-dose pantothenic acid over twelve weeks. It has not been replicated at scale, the dose is extreme relative to requirement, and gastrointestinal upset was common.

Not enough evidence. Not enough human research to say anything useful yet.

No source is attached to this association yet, so it is rated not enough evidenceby default. It is listed because people commonly ask about it — not because there is evidence for it.

Stress and anxiety

Mental Wellbeing
Not enough evidence

There is no clinical evidence that pantothenic acid affects stress or "adrenal fatigue", which is not a recognised diagnosis. Its role in synthesising coenzyme A — needed for steroid hormone production among many other things — is the entire basis of the marketing.

Not enough evidence. Not enough human research to say anything useful yet.

View the 2 sources

Deep research mode adds each paper’s own conclusion and stated limitations.

Things to know

Interactions, contraindications and dose limits, most serious first. Concentrated extracts interact with medication in ways the whole plant does not, so this section carries more weight here than it does on a food page.

  • Too much

    Diarrhoea at gram doses

    The acne dose of over 2 g/day commonly causes diarrhoea and abdominal discomfort. Very high intakes have also been associated with isolated reports of eosinophilic pleuropericardial effusion, though causation is not established.

  • Worth knowing

    "Adrenal fatigue" is not a diagnosis

    A systematic review of the literature found no evidence that "adrenal fatigue" exists as a condition. Persistent unexplained fatigue deserves proper investigation — thyroid disease, anaemia, sleep apnoea and depression are all far more likely explanations than a B5 shortfall.

  • Interaction

    Interference with biotin at high doses

    Pantothenic acid and biotin share an intestinal transporter, so very high doses of one may modestly reduce absorption of the other. The clinical significance is unclear.

  • Worth knowing

    Deficiency is essentially theoretical

    Isolated pantothenic acid deficiency has only been produced experimentally or seen in severe malnutrition. Supplementing it on a normal diet corrects nothing.

In the food catalogue

The whole-food form, where one exists. The evidence for a concentrated extract rarely transfers to the food, or the other way round — these are cross-links, not equivalents.

AvocadoOne of the better everyday fruit sources.Chicken liverAmong the densest food sources.Shiitake mushroomsA notably rich plant source.

Evidence ratings on this page: 1 limited evidence, 2 not enough evidence.

Supplements are sold in the US without pre-market review of efficacy or safety. Nothing on this page is a recommendation to take Pantothenic acid (vitamin B5), or a dose to follow.