Vitamin B5 Test

Vitamin B5, also known as pantothenic acid, is a water-soluble vitamin that plays a central role in how your body creates energy and maintains essential cellular functions. It’s best known for being the raw material your body uses to make coenzyme A (CoA)—a molecule so vital that it’s involved in nearly every major metabolic pathway in your cells.

Coenzyme A acts like a metabolic multitool. It enables your body to:

• Convert carbohydrates, fats, and proteins from your food into usable energy
• Build fatty acids and cholesterol, which are needed for hormone production and healthy cell membranes
• Produce acetylcholine, a brain chemical critical for memory, mood, and muscle movement
• Support detoxification in the liver
• Help synthesize hemoglobin, the protein that carries oxygen in red blood cells

To perform all these roles, vitamin B5 must first be absorbed from food. This happens in the small intestine, where it enters the body using a sodium-dependent transport system—a biological mechanism that moves nutrients across cell membranes by pairing them with sodium. Once inside your cells, vitamin B5 is transformed into coenzyme A through a series of steps that require ATP, the energy currency of your cells.

Vitamin B5 is found in nearly every type of food, including eggs, poultry, mushrooms, avocados, legumes, and whole grains. Even your gut bacteria produce small amounts. Because of this widespread availability, deficiencies are rare. In fact, the name “pantothenic” comes from the Greek word pantos, meaning “everywhere.”

Still, in cases of severe malnutrition, alcoholism, or rare genetic conditions, low levels of vitamin B5 can occur. Symptoms include:

• Paresthesias—a tingling or pins-and-needles feeling, often in the feet
• A condition called burning feet syndrome, where the feet feel hot and painful
• Fatigue, irritability, nausea, and poor coordination

One rare condition, pantothenate kinase-associated neurodegeneration (PKAN), is caused by mutations in a gene needed to activate vitamin B5. This disrupts coenzyme A production and leads to movement disorders and iron buildup in the brain. While early research suggests B5 supplements may help in some cases, more evidence is needed.

Beyond deficiency, vitamin B5 is gaining attention for its potential role in preventing chronic diseases and supporting healthy aging:

• In the brain, B5 supports acetylcholine and myelin (the insulation around nerves), both of which are essential for cognitive function. Low levels have been linked to conditions like Alzheimer’s disease.
• In the heart, a derivative of vitamin B5 called pantethine has been shown to lower LDL cholesterol and total cholesterol in people with moderate cardiovascular risk.
• In the eyes, higher intake of vitamin B5 has been associated with a lower risk of advanced age-related macular degeneration (AMD).
• For immunity and recovery, vitamin B5 helps produce steroid hormones and supports liver detoxification, wound healing, and joint repair.
• Some studies even suggest a potential protective role against viral infections like COVID-19, possibly due to its influence on immune regulation.

Vitamin B5 is very safe. The body eliminates any excess through urine, and no toxicity has been reported at typical doses. The adequate intake for adults is 5 mg per day, increasing to 6 mg during pregnancy and 7 mg during breastfeeding.

In summary, vitamin B5 is a foundational nutrient that keeps your cells energized and resilient. From powering metabolism to supporting brain health, hormone balance, and immune function, it’s a quiet but critical player in the pursuit of both lifespan and healthspan.