One Daily Women's by 21st Century — Ingredients, Evidence & Safety

🟢 100/100

This product looks safe

No ingredients exceed tolerable upper intake levels
71% of ingredients have research evidence

A Label Compliance Grade

Product Label

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Label Data

1 Tablet(s) Serving Size

100 Servings

Multi-Vitamin and Mineral (MVM) Product Type

71% Evidence Coverage

Supplement Facts — Evidence Check

Vitamin A

700 mcg (78% DV)

Vitamin C

84 mg (93% DV)

Vitamin D3

25 mcg (125% DV)

✅ 1.7× RDA — within safe limits 📚 604 studies (Tier A: 16, B: 251)

RDA 0.015mg This product: 0.025mg UL 0.1mg

Vitamin E

7.5 mg (50% DV)

✅ Within RDA (0.5× RDA of 15 mg) 📚 177 studies (Tier A: 3, B: 90)

RDA 15mg This product: 7.5mg UL 1000mg

Vitamin K

25 mcg (21% DV)

✅ Within RDA (0.2× RDA of 0.12 mg) 📚 273 studies (Tier A: 9, B: 175)

RDA 0.12mg This product: 0.025mg

Thiamine

1.2 mg (100% DV)

✅ Within RDA (1.0× RDA of 1.2 mg) 📚 76 studies (Tier A: 0, B: 33)

RDA 1.2mg This product: 1.2mg

Riboflavin

1.3 mg (100% DV)

✅ Within RDA (1.0× RDA of 1.3 mg) 📚 12 studies (Tier A: 0, B: 1)

RDA 1.3mg This product: 1.3mg

Niacin

16 mg (100% DV)

✅ 1.1× RDA — within safe limits 📚 193 studies (Tier A: 5, B: 63)

RDA 14mg This product: 16mg UL 35mg

Vitamin B6

1.7 mg (100% DV)

✅ 1.3× RDA — within safe limits 📚 113 studies (Tier A: 3, B: 35)

RDA 1.3mg This product: 1.7mg UL 100mg

Folate

665 mcg (166% DV)

✅ 1.7× RDA — within safe limits 📚 225 studies (Tier A: 10, B: 105)

RDA 0.4mg This product: 0.665mg UL 1.0mg

Vitamin B12

6 mcg (250% DV)

✅ 2.5× RDA — within safe limits 📚 138 studies (Tier A: 1, B: 44)

RDA 0.0024mg This product: 0.006mg

Biotin

30 mcg (100% DV)

✅ Within RDA (1.0× RDA of 0.03 mg) 📚 26 studies (Tier A: 0, B: 11)

RDA 0.03mg This product: 0.03mg

Pantothenic Acid

5 mg (100% DV)

✅ Within RDA (1.0× RDA of 5 mg) 📚 1 studies — no high-quality reviews

RDA 5mg This product: 5mg

Calcium

400 mg (31% DV)

Iron

18 mg (100% DV)

Iodine

150 mcg (100% DV)

✅ Within RDA (1.0× RDA of 0.15 mg) 📚 243 studies (Tier A: 4, B: 133)

RDA 0.15mg This product: 0.15mg UL 1.1mg

Zinc

8 mg (73% DV)

✅ Within RDA (0.7× RDA of 11 mg) 📚 258 studies (Tier A: 6, B: 134)

RDA 11mg This product: 8mg UL 40mg

Selenium

27.5 mcg (50% DV)

✅ Within RDA (0.5× RDA of 0.055 mg) 📚 172 studies (Tier A: 0, B: 67)

RDA 0.055mg This product: 0.0275mg UL 0.4mg

Copper

0.9 mg (100% DV)

✅ Within RDA (1.0× RDA of 0.9 mg) 📚 36 studies (Tier A: 0, B: 11)

RDA 0.9mg This product: 0.9mg UL 10mg

Manganese

1.8 mg (78% DV)

✅ Within RDA (0.8× RDA of 2.3 mg) 📚 8 studies — no high-quality reviews

RDA 2.3mg This product: 1.8mg UL 11mg

Chromium

25 mcg (71% DV)

✅ Within RDA (0.7× RDA of 0.035 mg) 📚 197 studies (Tier A: 1, B: 55)

RDA 0.035mg This product: 0.025mg

Other Ingredients

Gum Acacia Cellulose Starch Croscarmellose Sodium Dicalcium Phosphate Gelatin Magnesium Silicate Polyethylene Glycol Polysorbate Polyvinyl Alcohol Silicon Dioxide Stearic Acid

Label Claims — Verification

❓ Nutrient

❓ All Other

❓ Structure/Function

All Other (99% of products) Structure/Function (76% of products) Nutrient (58% of products)

Target Groups

Adult Female (18 - 50 Years) Gluten Free

Product Information

📋 Directions for Use

Directions: As a dietary supplement, adults take one (1) tablet daily with any meal or as directed by a healthcare provider. Do not exceed recommended dosage. Individual results may vary.

⚠️ Warnings & Precautions

Do not exceed recommended dosage.

Warning: Consult a healthcare provider prior to use if pregnant, nursing, on medications, have a medical condition or are planning a medical procedure.

Stop use and contact a physician if adverse reactions occur.

Keep out of reach of children.

Do not use if product appears to be tampered with or seal is broken.

Warning: Accidental overdose of iron-containing products is a leading cause of fatal poisoning in children under 6. Keep this product out of reach of children. In case of accidental overdose, call a doctor or poison control center immediately.

🧪 Formulation Notes

Non-GMO Gluten free

No artificial sweeteners, colors or flavors

No added yeast, artificial sweeteners, colors or flavors.

Gluten free.

Guaranteed quality Laboratory tested

Trusted Quality for over 30 years

Additional Information

Compare vs. One A Day Women's This product is not manufactured or distributed by Bayer Health Care, LLC, owner of the registered trademark of One A Day.

Store at room temperature.

Product Details

UPC / SKU 7 40985 27308 1

DSLD Entry Date 2024-01-24

Product Type Multi-Vitamin and Mineral (MVM)

Form Tablet or Pill

Brand 21st Century

DSLD ID 304113

Data Updated 2026-04-11

Research Evidence

337 Research Sources

54 Avg Quality Score

161 Meta Analysis

68 Systematic Review

51 Rct

48 Clinical Trial

2 Other

2 Regulatory Source

1 Narrative Review

1 Cochrane Review

1 Guideline

1 Openfda Safety

A Vitamin A supplementation for preventing morbidity and mortality in children from six months to five years of age

Meta Analysis The Cochrane database of systematic reviews 2017

PubMed DOI Cochrane

A Vitamin A supplementation for the prevention of morbidity and mortality in infants six months of age or less

Meta Analysis The Cochrane database of systematic reviews 2011

PubMed DOI Cochrane

A Vitamin A supplementation for reducing the risk of mother-to-child transmission of HIV infection

Meta Analysis The Cochrane database of systematic reviews 2011

PubMed DOI Cochrane

A Vitamin A supplements for preventing mortality, illness, and blindness in children aged under 5: systematic review and meta-analysis

Meta Analysis BMJ (Clinical research ed.) 2011

PubMed DOI

A Fortification of staple foods with vitamin A for vitamin A deficiency

Systematic Review The Cochrane database of systematic reviews 2019

PubMed DOI Cochrane

A Vitamin A supplementation for the prevention of morbidity and mortality in infants one to six months of age

Narrative Review The Cochrane database of systematic reviews 2016

PubMed DOI Cochrane

A Vitamin A and fish oils for preventing the progression of retinitis pigmentosa

Meta Analysis The Cochrane database of systematic reviews 2020

PubMed DOI

A Exercise training-induced changes in exerkine concentrations may be relevant to the metabolic control of type 2 diabetes mellitus patients: A systematic review and meta-analysis of randomized controlled trials

Meta Analysis Journal of sport and health science 2023

PubMed DOI

A Food fortification with multiple micronutrients: impact on health outcomes in general population

Meta Analysis The Cochrane database of systematic reviews 2019

PubMed DOI

A Oral vitamin A supplements to prevent acute upper respiratory tract infections in children up to seven years of age

Meta Analysis The Cochrane database of systematic reviews 2024

PubMed DOI

View all evidence for Vitamin A →