Understanding Vitamin A and B Supplements: A Comprehensive Guide for Women

Vitamin A and B vitamins do different jobs, and many women benefit from both. Vitamin A is fat-soluble and supports your vision, skin and immune defenses. The B complex is a group of water-soluble vitamins that help turn the food you eat into usable energy and keep your nerves and red blood cells healthy.

This guide covers what each one does, which deficiencies are common in women (including vitamin D and iron), and how these nutrients work together.

What vitamin A and B supplements are

Vitamin A (retinol) is a fat-soluble vitamin that keeps your retinas healthy and supports the growth of epithelial cells, the cells that line your skin and organs. It comes in two forms: preformed vitamin A (retinoids) from animal foods and provitamin A (carotenoids) from plants.

The B complex is eight water-soluble vitamins: B1 (thiamine), B2 (riboflavin), B3 (niacin), B5 (pantothenic acid), B6 (pyridoxine), B7 (biotin), B9 (folate) and B12 (cobalamin). Your body doesn't store much of them, so you need a regular supply from food or supplements. Our article on B vitamins and energy metabolism explains how they work together.

Why women need them

Women's nutrient needs change through the reproductive years, pregnancy and menopause. Evidence shows vitamin A may support your natural defenses by strengthening the barriers that line your respiratory and digestive tracts.

Among the B vitamins, folate (B9) and B12 stand out. Folate is needed for DNA synthesis and repair, which makes it central to prenatal health. B12 is needed to make healthy red blood cells and to maintain the myelin sheath that protects your nerves.

What vitamin A does beyond vision

Vitamin A is best known for helping you see in the dark, but it also acts as a signal that tells cells how to mature. That's why it matters for skin, and why vitamin A compounds are used for acne and fine lines. Research also suggests it helps your body make and use white blood cells such as lymphocytes, a key part of your immune response.

The B complex and energy

The "energy" from B vitamins isn't a caffeine-like buzz. It comes from your metabolism running smoothly. Thiamine (B1) helps convert carbohydrates into glucose, the main fuel for your brain and nerves. Riboflavin (B2) and niacin (B3) are needed for the electron transport chain, the series of reactions in your mitochondria that produces ATP (adenosine triphosphate).

Ongoing fatigue can be a sign these pathways aren't getting enough support. A B complex supplement provides all eight B vitamins together.

Common deficiencies in women

Even with plenty of food available, many women run low on a few nutrients. There are several common nutrient deficiencies in women, most often iron, vitamin D and some B vitamins. They can show up as brittle nails, hair loss or irritability. Often they're "silent": they don't make you ill, but they keep you from feeling your best.

Vitamin B12

B12 needs a protein called intrinsic factor to be absorbed in the small intestine, and this process gets less efficient with age. B12 comes mainly from animal foods, so people on plant-based diets are at much higher risk. In a 2009 paper in the American Journal of Clinical Nutrition, Allen et al. reported that B12 deficiency affects about 6% of adults under 60 and nearly 20% of those over 60, with vegans at far higher risk.

The signs of vitamin B12 deficiency include numbness in the hands and feet, memory problems and a specific type of anemia. Make sure your supplement includes a well-absorbed form of B12.

Vitamins and zinc

Zinc is involved in hundreds of enzyme reactions. It's needed to transport vitamin A in your blood, so without enough zinc your body can't make good use of the vitamin A stored in your liver. Zinc also matters for wound healing and DNA synthesis. If you have sensitive skin or seem to get sick often, it makes sense to get zinc alongside vitamins A and B.

Low vitamin D

Vitamin D is a pro-hormone your skin makes in sunlight, but indoor lifestyles, sunscreen and where you live all reduce how much you make. In a 2011 paper in Nutrition Research, Forrest & Stuhldreher found that about 41.6% of US adults are vitamin D deficient (below 20 ng/mL), one of the most common deficiencies.

If you think you're low in vitamin D, get it checked. In the Journal of Investigative Medicine in 2011, Aranow et al. noted that vitamin D receptors are found on nearly all immune cells, and that deficiency is linked to more infections and autoimmune conditions.

Iron and B vitamins

Iron deficiency is the most common nutritional deficiency worldwide, especially in women of childbearing age because of monthly blood loss. B vitamins, particularly B6, B9 and B12, are also needed to build healthy red blood cells, so supplements for iron deficiency anemia often include them. If your B vitamins are low, iron alone may not fully fix the fatigue that comes with low iron stores.

Choosing a multivitamin

Supplements are meant to complement a healthy diet, not replace it. A multivitamin can act as a safety net, and our article on multivitamins for immune support explains how. Look for well-absorbed forms and a clean label. Our guide to women's multivitamins covers the difference between synthetic and food-based nutrients, and there's more in our complete women's multivitamin guide.

Where Go Wise Multivitamin fits

Go Wise Multivitamin is a powder stick you pour onto your tongue, with no water needed and a natural berry flavor. Each stick has vitamins A, C, D3, E, B6 and B12, niacin, pantothenic acid, biotin, folic acid, zinc and chromium, plus elderberry extract and kelp as a natural source of iodine. It's vegan, gluten-free and has no artificial colors or flavors. It doesn't include thiamin (B1) or riboflavin (B2); our B-12 Complex does. Every batch is third-party tested by Eurofins for heavy metals and microbial contamination, and it is made in a GMP-certified facility.

Before you start, ask your healthcare provider whether testing for vitamin D, B12 or iron makes sense for you.

Frequently asked questions

Can I take vitamin A and B supplements together?

Yes. Many multivitamins include both because they do different, complementary jobs. Vitamin A is fat-soluble and supports vision and immunity. B vitamins are water-soluble and focus on energy metabolism and nerve health.

What are the most common signs of a vitamin B deficiency?

Common signs include ongoing fatigue, brain fog, irritability, skin rashes and cracks at the corners of the mouth. Because B vitamins are involved in so many processes, symptoms vary depending on which one is low.

How do B vitamins contribute to energy levels?

B vitamins don't supply energy as calories. They act as cofactors that help enzymes break down carbohydrates, fats and proteins into ATP, the main energy molecule your cells use. That's why they're linked with energy.

Why do women need specific supplements for iron deficiency anemia?

Women are at higher risk of iron deficiency because of blood loss during menstruation. Supplements for iron deficiency anemia often include vitamin C for better absorption, and B vitamins like B12 and folate to support healthy red blood cell production.

What is the difference between vitamin A and beta-carotene?

Vitamin A (retinol) is the active form found in animal foods. Beta-carotene is a provitamin in plants that your body has to convert into active vitamin A. Some people have genetic variations that make this conversion less efficient, so a supplement with the active form can help them.

Is it possible to take too much vitamin A?

Yes. Vitamin A is fat-soluble, so it's stored in the liver and can build up to toxic levels if you take very high doses for a long time. Stick to the recommended daily allowance (RDA) and talk to a healthcare provider before taking high-dose vitamin A.

References

• Allen et al. American Journal of Clinical Nutrition. 2009.
• Forrest, Stuhldreher. Nutrition Research. 2011.
• Aranow et al. Journal of Investigative Medicine. 2011.

This article is for general information and isn't medical advice. Talk to your healthcare provider before starting a supplement, especially if you are pregnant, nursing or taking other medication.