One A Day
Product brand
UnclaimedOne A Day is a Bayer multivitamin and dietary-supplement brand introduced by Miles Laboratories in 1940.
Last updated August 22, 2026
Overview
One A Day is a family of multivitamin and dietary-supplement products owned and marketed by Bayer. The brand was introduced in 1940 by Miles Laboratories, making it one of the longstanding mass-market names in the vitamin category. Its central proposition is convenience: products are formulated and marketed around once-daily consumption, with different variants aimed at demographic groups, life stages, nutritional priorities, and preferred formats. The portfolio has expanded well beyond a single general-purpose multivitamin. Products listed under the brand include adult formulas such as Essential and Maximum, gender- and age-oriented offerings such as Men's Health, Men's 50+ Advantage, Women's, and Women's 50+ Advantage, and products for teenagers and expectant mothers. The line also includes functional or occasion-oriented formulas such as Cholesterol Plus, Energy, Energy Advantage2O, Women's Active Metabolism, and Women's Active Mind & Body. VitaCraves Gummies extends the brand into a chewable format, while Women's2O provides another format or positioning within the women's range. One A Day's broad portfolio reflects the way the modern supplement market is segmented. Rather than presenting one formula as suitable for everyone, the brand uses life-stage and wellness claims to distinguish products for men, women, older adults, teenagers, prenatal users, and consumers seeking energy or other targeted benefits. This gives Bayer a platform for addressing multiple supplement occasions while retaining the recognizable One A Day name. The brand's history also includes a significant regulatory and reputational episode involving WeightSmart, a related Bayer-marketed product. The United States Federal Trade Commission alleged that advertising for WeightSmart made false weight-loss claims. Bayer agreed to a settlement described in the available reference material as totaling $25 million, with the FTC recovering $3.2 million; the WeightSmart product was subsequently discontinued. This episode is separate from the ordinary multivitamin positioning of the core One A Day range but is relevant to the brand family's advertising and regulatory history. One-A-Day Women's was also included in ConsumerLab.com's 2011 review of 38 leading multivitamin and multimineral products sold in the United States and Canada. The product passed the review's stated tests, which covered selected nutrient amounts, disintegration, lead thresholds under California Proposition 65, and aspects of FDA labeling compliance. That result was a test outcome for the reviewed product and should not be treated as a blanket certification of every One A Day product. Today, One A Day remains an active Bayer brand with a broad multivitamin and supplement portfolio. Publicly available reference material identifies Bayer as the corporate owner and describes a range of products, but it does not provide a reliable standalone founding company headquarters, current executive roster, revenue figures, or a complete global market list for the brand.
History
One A Day was introduced in 1940 by Miles Laboratories as a once-daily multivitamin product. The name established a straightforward usage proposition: consumers could incorporate a vitamin supplement into a daily routine without taking multiple doses throughout the day. Over time, the product developed from a single recognizable multivitamin concept into a broader family of formulas. The later portfolio strategy used segmentation to address different consumer groups and nutritional occasions. Bayer's listed products include general adult formulas, products for men and women, offerings for consumers aged 50 and over, a teen-oriented formula, and a prenatal product. The brand also added products associated with energy, cholesterol, active metabolism, active mind and body, and other wellness themes. In parallel, formats such as VitaCraves Gummies broadened the range beyond conventional tablets. Ownership of the brand eventually passed into Bayer's portfolio. The reference material identifies One A Day as a Bayer product family, while the original brand history is attributed to Miles Laboratories. The available sources do not establish every ownership transaction or provide a complete chronology of product launches, so those developments cannot be dated reliably here. A notable regulatory event concerned WeightSmart, a Bayer-marketed product associated with the One A Day brand family. The FTC alleged that WeightSmart advertising made false claims about weight loss. The matter resulted in a settlement reported as $25 million, including $3.2 million recovered by the FTC, and WeightSmart was discontinued. This episode illustrates the regulatory sensitivity surrounding health and weight-management claims, although it should not be conflated with evidence that all One A Day multivitamins made the same claims. In 2011, ConsumerLab.com tested One-A-Day Women's as part of a review of 38 leading multivitamin and multimineral products sold in the United States and Canada. The reviewed product passed the stated examination, which included selected nutrient testing, disintegration under United States Pharmacopeia-related criteria, lead contamination thresholds under California Proposition 65, and FDA labeling requirements. The result applies to the tested product and review period rather than to the entire brand portfolio. The brand remains active under Bayer and is presented as a broad multivitamin and dietary-supplement line. Available reference material supports its 1940 introduction, Bayer ownership, product-family structure, WeightSmart regulatory episode, and 2011 ConsumerLab result. It does not support a complete list of current markets, current executives, detailed financial reporting, or a fully dated history of every formulation and campaign.
Products and positioning
A convenient, once-daily multivitamin and supplement platform segmented by age, gender, life stage, wellness objective, and dosage format.
targeted multivitamin
Cholesterol Plus
A One A Day product positioned around cholesterol-related nutritional support. The available reference identifies the product name but does not provide its complete formulation, dosage, or current availability.
energy supplement
Energy
An energy-oriented member of the One A Day portfolio. Public reference material confirms its inclusion in the product family but does not establish detailed ingredients, claims, or launch timing.
energy and hydration supplement
Energy Advantage2O
A product name in the One A Day range combining an energy-oriented proposition with an '2O' format or hydration reference. The available source does not describe its formulation or current retail status.
general multivitamin
Essential
A general-purpose One A Day multivitamin offering identified in Bayer's listed portfolio. The reference material does not provide a full ingredient panel or a precise target-consumer description.
general multivitamin
Maximum
A higher-tier or expanded adult multivitamin offering identified under the One A Day name. Details about its nutrient levels, formulation changes, and availability are not established by the supplied sources.
men's multivitamin
Men's Health
A gender-targeted multivitamin intended for the men's segment of the One A Day portfolio. The available source confirms the product name but does not specify its formula or marketing claims.
older-adult men's multivitamin
Men's 50+ Advantage
An age-segmented offering for men aged 50 and above. It represents One A Day's use of life-stage segmentation, although detailed nutritional composition and launch information are not available in the supplied material.
teen multivitamin
Teen Advantage
A One A Day formula directed at teenage consumers. The source identifies the product as part of the portfolio but does not document its exact age range, ingredients, or market status.
gummy vitamins
VitaCraves Gummies
A chewable gummy format within the One A Day family. Its inclusion shows the brand's extension from conventional supplement forms into a more consumer-friendly delivery format; detailed variants and formulation data are not supplied.
women's multivitamin
Women's
A women's multivitamin in the core One A Day portfolio. One-A-Day Women's was the product reviewed by ConsumerLab.com in 2011, but that review should not be generalized to all products or all later formulations.
women's supplement
Women's2O
A women's-focused product listed in the One A Day family. The supplied reference does not explain the '2O' designation, formulation, dosage form, or current availability.
older-adult women's multivitamin
Women's 50+ Advantage
An age-specific multivitamin for women aged 50 and over. It reflects the brand's life-stage segmentation, while the available source does not provide detailed nutritional or commercial information.
women's wellness supplement
Women's Active Metabolism
A women's product positioned around active metabolism. The name and portfolio listing are documented, but the supplied material does not establish ingredients, substantiated claims, launch date, or current status.
women's wellness supplement
Women's Active Mind & Body
A women's wellness offering framed around mind-and-body activity. The available source confirms its place in the product family but does not provide formulation or market details.
prenatal vitamin
Women's Prenatal
A prenatal supplement designed for the pregnancy-related nutritional segment. The supplied source identifies the product but does not provide its nutrient profile, directions, or launch history.
Controversies
WeightSmart false weight-loss advertising allegations
The FTC alleged that Bayer advertising for WeightSmart falsely claimed that the product led to weight loss. The reference material reports a $25 million settlement, including $3.2 million recovered by the FTC, and states that WeightSmart was discontinued.
Brand decisions
- Discontinuation of WeightSmartOther
Background
WeightSmart faced FTC allegations concerning unsupported or false weight-loss advertising claims.
Action taken
Bayer discontinued the WeightSmart product after the regulatory settlement described in the available reference.
Aftermath
The matter resulted in a reported $25 million settlement, with $3.2 million recovered by the FTC. No reliable source in the supplied material provides a precise settlement year.
Settlement amount; FTC recovery. $25 million settlement; $3.2 million recovered by the FTC (Undated in the supplied reference)
Recent events
- 2011
One-A-Day Women's passes ConsumerLab review[1]
Other
ConsumerLab.com included One-A-Day Women's in a review of 38 leading multivitamin and multimineral products sold in the United States and Canada. The reviewed product passed tests covering selected nutrient content, disintegration, lead thresholds, and aspects of FDA labeling requirements.
Sources1 sources
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