Hey, Your One A Day® is Showing

Nutritional support you can feel good about—from supportive health benefits to the taste. As part of a healthy lifestyle, taking One A Day® multivitamins is another thing you can do to be your best you.

Multivitamins Specially for You

Let’s face it, men and women are different. Grandparents and teens are different. Our nutritional needs change as we move through this amazing journey we call life.

One A Day® is a multivitamin brand with uniquely formulated products for your family. From prenatal to 65+, we offer complete multivitamins for different ages, genders, and health goals.

A Legacy of Nutritional Science

We’ve been leading vitamin innovations for over 75 years—and we’re not stopping any time soon. We believe that health is the key to accessing a better version of ourselves. That’s why we start with quality ingredients and continuously update our formulas to reflect the latest science.

Quality That Stands Up to 100+ Tests

We’re tough critics when it comes to quality. Our multivitamins are put through over 100 rigorous quality checks to ensure things like consistency and accuracy. We’re committed to providing you with the nutrients you may need at the best quality we can provide.

Formulas Designed by Experts

To create our multivitamins, our experienced team of researchers, scientists, and brand enthusiasts work together to identify the top health concerns and desires for specific groups. We research important dietary nutrients in developing our unique formulas.

A Legacy of Meaningful Nutrition

To create our multivitamins, our experienced team of reseachers, scientists, and brand enthusiasts work together to identify the top health concerns for a specific group. Then, we research they may be locking in their diet to develop a unique formula.

Quality That Stands Up to 100+ Tests

To create our multivitamins, our experienced team of reseachers, scientists, and brand enthusiasts work together to identify the top health concerns for a specific group. Then, we research they may be locking in their diet to develop a unique formula.

Formulas Designed by Experts

To create our multivitamins, our experienced team of reseachers, scientists, and brand enthusiasts work together to identify the top health concerns for a specific group. Then, we research they may be locking in their diet to develop a unique formula.

Good Stuff You Want,
Not Stuff You Don’t

Our goal is to formulate every one of our multivitamins with good stuff you want and keep it free of the stuff you don't. That’s why we’re updating our packaging to highlight stuff you don’t want, like being free of allergens and artificial ingredients. Look for the following “Free Of” icons on select products.

no artificial flavors

FREE OF Artificial Flavors

gluten free

FREE OF Gluten

no artificial sweeteners

FREE OF Artificial Sweeteners

no wheat ingredients

FREE OF Wheat

no artificial colors

FREE OF Artificial Colors

no eggs

FREE OF Egg

no HFCS

FREE OF High Fructose Corn Syrup

no soy ingredients

FREE OF Soy Allergens

No dairy

FREE OF Dairy

no fish ingredients

FREE OF Fish/Shellfish Allergens

Meet One of Our Own

Nastaran headshot

Nastaran Faghihnia, PhD

Senior Associate Director U.S. Medical Affairs, One A Day® Medical Lead, Professor, Scientist, and Mom


As one of the people responsible for developing One A Day’s® unique formulations, I put my PhD in Integrative Biology to work each and every day. I partner with product development, marketing, and regulatory to make sure that we are putting the best formulas out there. It’s so exciting when I get to see my efforts result in real products that help people.


Collaboration is one of the best things about my job. My colleagues consistently seek me out to learn about our formulas and I’m happy to share my knowledge about nutrition with them. In fact, one of my favorite pastimes is teaching courses on human nutrition, exercise physiology, and anatomy at renowned universities. From a young age, I knew that I was passionate about human health and wanted to build my career around it. That’s why I’m so proud and excited to do what I do at Bayer.


Collaboration is one of the best things about my job. My colleagues consistently seek me out to learn about our formulas and I’m happy to share my knowledge about nutrition with them. In fact, one of my favorite pastimes is teaching courses on human nutrition, exercise physiology, and anatomy at renowned universities. From a young age, I knew that I was passionate about human health and wanted to build my career around it. That’s why I’m so proud and excited to do what I do at Bayer.


As a mother of two, my go-to multivitamin is One A Day® Prenatal 1.

As a mother of two, my go-to multivitamin is One A Day® Prenatal 1.