Pantothenic acid (vitamin B5) supports metabolism and protects the heart, skin, and eyes. It builds coenzyme A and helps regenerate skin cells. Still, its potential benefits lack solid clinical evidence. Read on to learn the health benefits, sources, and dosage of pantothenic acid.
Vitamin B5, or pantothenic acid, is involved in many different functions of the body. It helps convert food into energy by supporting the metabolism of carbs, protein, and fats. Additionally, it is important for the immune, nervous, and gastrointestinal system .
It is a precursor for coenzyme A (CoA), which enables many different enzymatic pathways .
Topically, pantothenic acid is used in cosmetic products and eye drops, due to its skin-regenerating properties.
Vitamin B5 is sold under many different names as a supplement: D-pantothenic acid, dexpanthenol, zinc pantothenate, and calcium pantothenate .
- Aids metabolism of fats and carbohydrates
- May lower cholesterol levels
- Protects the heart
- May reduce stress
- Soothes the skin and eyes
- All benefits lack solid clinical evidence
- May not help with skin irradiation
- Higher doses may cause nausea
In a pilot study of 50 children with allergic rhinitis, a nasal spray with D-panthenol (also included lactoferrin, carboxymethyl-glucan and dipotassium glycyrrhizinate) effectively reduced the symptoms of allergic rhinitis, including nasal congestion .
A spray with dexpanthenol, an analog of pantothenic acid, reduced nasal obstruction, crust formation, and throat inflammation in 48 patients .
In 50 patients with chronic nasal and sinus inflammation (rhinosinusitis), a different spray with dexpanthenol reduced nasal discharge but not other symptoms after endoscopic sinus surgery .
No valid clinical evidence supports the use of pantothenic acid for any of the conditions in this section. Below is a summary of up-to-date animal studies, cell-based research, or low-quality clinical trials which should spark further investigation. However, you shouldn’t interpret them as supportive of any health benefit.
The same group of researchers observed these results in a similar trial with 32 subjects .
However, both trials were funded by the company that sells pantethine, which indicates a potential conflict of interest.
In another study of 182 patients, different forms of vitamin B5 (300-500 mg/day) supported the treatment of heart disease by improving metabolism and blood lipids .
Well-designed, unbiased clinical trials should investigate the effects of pantothenic acid and its derivatives on heart health.
Panthenol is widely used in clinical practice for the improvement of wound healing and skin irritation. However, this use also lacks solid clinical evidence.
In two trials, dexpanthenol reduced skin water loss, skin roughness, and skin inflammation due to sodium lauryl sulfate (SLS) exposure. This effect is of great importance, given that SLS is present in a range of cosmetic products [10, 11].
However, it wasn’t able to prevent SLS-induced skin irritation in another study in 25 volunteers .
Dexpanthenol speeded up the wound healing and repaired skin cells in test tubes .
Dexpanthenol 5% drops and gel showed similar benefits and enhanced wound healing following eye surgery in 40 patients .
However, it had insignificant benefits on eye wound healing in another trial of 18 patients .
According to one review of human and animal studies, pantothenic acid, along with other B vitamins and adaptogenic herbs, may minimize some of the negative effects of stress .
More research is needed before jumping to conclusions.
In an adequate dosage, pantothenic acid is likely safe and well-tolerated, including children and pregnant women. High doses may cause digestive upset and diarrhea. Topical application is also safe but may cause skin irritation in sensitive individuals .
The following doses of pantothenic acid (vitamin B5) are recommended daily: 
- 1.7 mg for infants younger than six months
- 1.8 mg for infants 6-12 months
- 2 mg for children 1-3 years
- 3 mg for children 4-8 years
- 4 mg for children 9-13 years
- 5 mg for 14 years and older
- 6 mg for Pregnant women
- 7 mg for Breastfeeding women