How B Vitamins Support Energy Metabolism

by Lauren Panoff, MPH, RD, DipACLM

Many things tend to slow down as we get older, and it can feel harder to find as much energy and endurance to do certain things. Everyday nutrition habits are among the most important factors in sustaining energy and supporting overall wellness.

The B vitamins play a direct, science-backed role in how your body produces and uses energy. A strategic approach to your food choices and supplement routine can help you meet your needs.

What is Energy Metabolism?

Anytime you’re climbing a flight of stairs, walking through the grocery store, or thinking through a problem, your body is relying on a continuous supply of fuel for energy. This fuel has to be built from the nutrients and compounds in the foods you eat.

Energy metabolism is a series of chemical processes that your body uses to convert what you’re consuming into ATP (adenosine triphosphate), the primary energy currency in your cells. Carbohydrates are broken down into glucose (sugar molecules), fats into fatty acids, and proteins into amino acids, which go through further steps to become ATP.

In addition to nutrients, energy metabolism processes need coenzymes (helpers), including B vitamins. As we age, the efficiency of mitochondria (the “powerhouses” of cells) naturally declines, meaning your body has to work harder to produce the same amount of energy it once did with ease. Ensuring adequate B vitamin intake becomes even more important.

What the B Vitamins Do For Energy

There are 8 recognized B vitamins. They work together, each playing a role in supporting your body's energy production:

  • B1 (Thiamine): Thiamine helps convert carbohydrates into usable fuel. Without enough B1, glucose can't efficiently enter the energy-producing pathways your cells depend on.
  • B2 (Riboflavin): Riboflavin is necessary in the final stage of cellular energy production, where most ATP is made. It also helps recycle other B vitamins.
  • B3 (Niacin): Niacin helps make NAD+ (nicotinamide adenine dinucleotide), a coenzyme involved in hundreds of reactions in your body. NAD+ synthesis pathways decline with age.
  • B5 (Pantothenic Acid): B5 is required to make Coenzyme A, a molecule that supports ATP production. It's involved in breaking down all three macronutrients.
  • B6 (Pyridoxine): B6 supports protein metabolism and helps your body make brain chemicals like serotonin and dopamine, which influence energy, mood, and clarity. It also assists in converting stored glycogen into glucose for fuel.
  • B7 (Biotin): Biotin acts as a coenzyme in reactions involved in breaking down fats and carbs for energy. It also supports the body's ability to make glucose from non-carbohydrate sources.
  • B9 (Folate): Folate is critical for the production of healthy red blood cells, which carry oxygen through your bloodstream to your muscles, brain, and organs.
  • B12 (Cobalamin): Vitamin B12 works with folate to support red blood cell formation and plays a unique role in supporting nerve signaling and muscle function. B12 absorption declines with age.

B12 and B Complex: Energy Stars

While every B vitamin plays a valuable role, two stand out as particularly powerful allies for older adults managing their energy metabolism and vitality: vitamin B12 and B-Complex.*

B12 is arguably the most critical B vitamin for anyone over 50. It supports the production of red blood cells, maintains the nervous system, and is deeply involved in the cellular energy processes that keep you feeling sharp and strong.*

As we age, the stomach produces less acid and less of a protein called intrinsic factor (IF), both of which are needed to absorb B12 from food. In addition to a balanced diet, a high-quality, highly bioavailable B12 supplement may be a worthwhile addition to an older adult's daily routine.

B-Complex, on the other hand, is the whole team in a single capsule. Rather than targeting one pathway, a B-Complex supplement supports energy metabolism from multiple angles.* This matters because B vitamins work synergistically. For adults who want comprehensive, convenient nutritional support, a daily B-Complex provides a nice foundation.

The Vitamin B-50® Complex is made up of several vitamins that work well together to support nervous system health.* Another option is Vitamin B Complex + Vitamin C Time Release tablets, which provide B vitamins to promote energy metabolism and nervous system function and Vitamin C, which helps fight free radicals in the body while supporting a healthy heart.*

Alternatively, our Vitamin B-Complex and Vitamin B-12 supplement combines B1, B2, B3, and B12, vitamins that are involved in energy metabolism and help maintain the health of nerves and heart health.*

Food Sources and Supplements

A balanced diet is always the best first line of support for overall wellness, including energy support. Eating a variety of nutrient-dense, colorful foods like fruits, vegetables, nuts, seeds, whole grains, legumes, and other lean proteins is a great way to incorporate plenty of protein, healthy fats, complex carbs, and fiber, along with the vitamins (including B vitamins) and minerals your body needs.

However, sometimes diet isn’t enough, which is where certain supplements might come in handy. Appetite can naturally decrease with age, making it harder to consistently consume the volume and variety of foods needed to meet all nutritional targets, and nutrient absorption can also become less efficient.

Choosing a Quality Supplement

Not all supplements are created equally, and it’s important to prioritize the following when choosing B vitamins to support your diet and lifestyle:

  • Appropriate dosage: Because absorption declines with age, older adults may benefit from higher doses than younger people to achieve the same blood levels. Look for supplements that reflect current guidelines for your age group rather than one-size-fits-all formulas.
  • Clean formulation: Avoid products with unnecessary fillers, artificial colors, or allergens to help keep things simple.

It’s always best to consult your healthcare provider before adding a new supplement to your routine, especially if you have existing health conditions or take medications.

B Vitamins and Energy Support

Energy doesn’t suddenly disappear with age, but it does require more intentional support. B vitamins from the foods you eat and supplements you choose to take, such as B-Complex and Vitamin B12, can help support your intake of these important nutrients.

Check out our full line of B vitamin supplements for more.

*These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease.

References

  1. Lamers Y. Vitamin B-12 Requirements in Older Adults—Increasing Evidence Substantiates the Need To Re-Evaluate Recommended Amounts and Dietary Sources. J Nutr, 2022 Nov; 152(11):2317-2318. https://doi.org/10.1093/jn/nxac179
  2. Vitamin B12. Accessed May 12, 2026. https://ods.od.nih.gov/factsheets/Vitaminb12-HealthProfessional/