What are One A Day products used for?
One A Day products are vitamin/mineral supplements that can help you meet your nutritional needs. They are typically used to supplement a healthy diet when dietary intake might not be enough or to support specific life stages (like pregnancy or aging). They are not a substitute for a balanced meal.
There are One A Day products for adults and children as young as 4 years old.
What are the possible side effects of One A Day products?
One A Day products are generally safe. However, some people may have mild, nonserious side effects, especially when first starting the supplement. These often go away with continued use.
- Mild stomach upset or nausea
- Constipation or diarrhea
- Unusual or darker stools (often due to iron content)
To help reduce stomach upset, try taking your One A Day product with food or a full glass of water. Some One A Day products may require you to take food with the supplement. Read the label on the product you are using to learn more.
Stop taking the supplement if you develop a rash or hives. Get medical help right away if you have signs of a serious allergic reaction, such as trouble breathing or swelling of the face, lips, or throat.
Interactions and Warnings
Certain vitamins and minerals can interfere with how your body absorbs or uses your prescription medications. It is crucial to tell your doctor or pharmacist about all supplements you take.
| Medication Type | Potential Interaction |
|---|---|
| Thyroid hormones (such as levothyroxine) | Products that contain iron, calcium, or zinc can block absorption of a thyroid medicine. Talk to your doctor or pharmacist to see if you are taking a thyroid medicine that can bind to ingredients in a One A Day product. If so, separate the doses by at least 4 hours. |
| Blood thinners (such as warfarin) | Changing your Vitamin K intake can affect blood clotting. If you take warfarin, talk to your doctor or pharmacist before starting a One A Day product. Keep your supplement use consistent. |
| Certain antibiotics that you take by mouth (such as ciprofloxacin, doxycycline) | Products that contain iron, calcium, or zinc can bind to the medicine, making the antibiotic less effective. Talk to your doctor or pharmacist to see if you are taking an antibiotic that can bind to ingredients in a One A Day product. In general, it is best to take your antibiotic at least 2 hours before taking a One A Day product. |
Always provide your full list of supplements to all your health care providers (doctors, pharmacists, dentists).
Keep One A Day products out of the reach of children. Accidental overdose of iron-containing products is a leading cause of fatal poisoning in children younger than 6. In case of accidental overdose, call a health care provider or Poison Control Center immediately.
What should I know before using One A Day products?
If you are pregnant or breastfeeding, talk to your health care provider before taking any One A Day products.
One A Day products can be free of things such as high fructose corn syrup, dairy, shellfish, soy, and synthetic colors. Read the label on the specific product you are using to learn more.
One A Day products may come as tablets, mini tablets, gummies, and soft gels. If you are taking a gummy product, chew the gummy fully before swallowing.
There may be side effects, additional warnings, and interactions with other medicines that are not listed here. These may vary depending on the combination of ingredients in the specific One A Day product you are using. Always check the label before taking any over-the-counter product. Do not take more than the recommended dose. Talk to your doctor or pharmacist about your health conditions and other medicines to help determine which products are safe for you.
Which One A Day product is right for me?
The different types of One A Day products are formulated to support the varying needs of different age groups and genders. Below are the categories and the primary reason for their specialized formulas.
Product Category | Why the Formula Is Different |
|---|---|
One A Day Women | Typically contains higher iron (to support blood health/menstruation) and more folic acid and calcium for bone support. |
One A Day Men | Generally contains no iron and may have different levels of zinc and B vitamins to support muscle function and energy metabolism. |
One A Day 50+ One A Day 65+ | Formulated with higher levels of vitamin D and vitamin B12, which are often harder to absorb or needed in greater amounts as we age. |
One A Day Prenatal | Specifically designed with essential nutrients like folic acid and iron to support the mother and the developing baby. |
One A Day Pregnancy Recovery | Formulated with folic acid, B vitamins, and omega-3s to help with energy support, immunity, and support higher nutritional needs for breastfeeding |
One A Day Menopause | Generally contains soy isoflavones to help with hot flashes and nutrients to support nutritional needs |
One A Day Teen | Generally contains nutrients to help support growth and development |
One A Day Kids | Lower doses formulated for children 4 years and older, supporting their growth and development |
One A Day Pre-Pregnancy Couple’s Pack | Contains nutrients such as DHA, folic acid, and iron to help support a couple’s nutritional health before, during, and after pregnancy. Contains nutrients such as antioxidants, lycopene, and zinc to help support healthy sperm |