Vitamin B5 (Pantothenic Acid)

Supplements · Vitamins · Supplement, Typed Supps

Its name comes from the Greek for everywhere — because it is in almost every food.

Stage by stage

Intake (Tablet): Absorbed efficiently in the small intestine.
Small intestine (Efficient absorption): Rarely a source of deficiency given how widely it occurs in food.
Bloodstream (Carried to cells): Carried in blood throughout the body.
Coenzyme A (Central metabolic role): Used to build coenzyme A, central to processing fats, carbohydrates, and proteins for energy.

What the evidence supports

Correcting a documented deficiency — strong evidence. True in principle. In practice isolated pantothenic acid deficiency is almost unheard of outside experimental settings — the name means "from everywhere" for a reason.
Reducing acne — limited evidence. One small trial at very high doses reported improvement. Not replicated at any scale.
Improving energy or stress resilience — insufficient evidence. A staple of "adrenal support" formulas without evidence behind that use.

Typical dose

Supplements and B-complexes usually supply many times the adequate intake for no established reason. The one small acne trial that reported benefit used very high doses, of the order of grams per day.

Upper limit: No UL has been established, as no toxicity has been demonstrated. Very high doses — of the order of 10 g daily — have been reported to cause mild intestinal upset and diarrhoea

Timing

With food, standard dosing.

Time to effect

Weeks: Levels normalize with regular intake.

Medication interactions

No established drug interactions: No clinically important interaction has been documented for pantothenic acid at the amounts found in food or in multivitamins. That reflects a nutrient the body handles easily rather than a literature that has looked hard, but there is nothing here to plan around. (moderate)
Tetracycline and quinolone antibiotics: Not the vitamin itself: the usual supplement form is calcium pantothenate, and calcium binds these antibiotics in the gut. At B-complex amounts the calcium involved is trivial, but if your product is a combined multivitamin with real calcium in it, separate it from the antibiotic by a couple of hours. (moderate)

Common myth

“B5 supplements meaningfully treat acne.” In reality: Small studies have explored high-dose B5 for acne, but evidence is limited and studied doses are far above typical supplement amounts.