Energy by Bayer One A Day — Ingredients, Evidence & Safety

🟢 99/100

This product looks safe

Niacin: 40mg is 1.1× the Tolerable Upper Intake Level (35mg)
71% of ingredients have research evidence

C Label Compliance Grade

Product Label

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Safety Alerts

⚠️ Niacin: 40mg is 1.1× the Tolerable Upper Intake Level (35mg)

Label Data

1 Tablet(s) Serving Size

Other Combinations Product Type

71% Evidence Coverage

Supplement Facts — Evidence Check

Vitamin A

3500 IU (70% DV)

Vitamin C

60 mg (100% DV)

Vitamin D

400 IU (100% DV)

✅ Within RDA (0.7× RDA of 0.015 mg) 📚 604 studies (Tier A: 16, B: 251)

RDA 0.015mg This product: 0.01mg UL 0.1mg

Vitamin E

22.5 IU (75% DV)

✅ Within RDA (1.0× RDA of 15 mg) 📚 177 studies (Tier A: 3, B: 90)

RDA 15mg This product: 15.075000000000001mg UL 1000mg

Vitamin K

25 mcg (31% 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

3 mg (200% DV)

✅ 2.5× RDA — within safe limits 📚 76 studies (Tier A: 0, B: 33)

RDA 1.2mg This product: 3mg

Riboflavin

3.4 mg (200% DV)

✅ 2.6× RDA — within safe limits 📚 12 studies (Tier A: 0, B: 1)

RDA 1.3mg This product: 3.4mg

Niacin

40 mg (200% DV)

⚠️ Exceeds Tolerable Upper Intake Level by 1.1× (UL: 35 mg) 📚 193 studies (Tier A: 5, B: 63)

RDA 14mg This product: 40mg UL 35mg

Vitamin B6

4 mg (200% DV)

📊 3.1× RDA — above typical dose (UL: 100 mg) 📚 113 studies (Tier A: 3, B: 35)

RDA 1.3mg This product: 4mg UL 100mg

Folic Acid

400 mcg (100% DV)

✅ Within RDA (1.0× RDA of 0.4 mg) 📚 225 studies (Tier A: 10, B: 105)

RDA 0.4mg This product: 0.4mg UL 1.0mg

Vitamin B12

12 mcg (200% DV)

📊 5.0× RDA — above typical dose 📚 138 studies (Tier A: 1, B: 44)

RDA 0.0024mg This product: 0.012mg

Biotin

300 mcg (100% DV)

📊 10.0× RDA — above typical dose 📚 26 studies (Tier A: 0, B: 11)

RDA 0.03mg This product: 0.3mg

Pantothenic Acid

10 mg (100% DV)

✅ 2.0× RDA — within safe limits 📚 1 studies — no high-quality reviews

RDA 5mg This product: 10mg

Calcium

250 mg (25% DV)

Iron

9 mg (50% 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

Magnesium

40 mg (10% DV)

📊 Market median: 4002.0mg (1 products) 📚 20 studies (Tier A: 0, B: 2)

This product: 40mg

Zinc

15 mg (100% DV)

✅ 1.4× RDA — within safe limits 📚 258 studies (Tier A: 6, B: 134)

RDA 11mg This product: 15mg UL 40mg

Selenium

45 mcg (64% DV)

✅ Within RDA (0.8× RDA of 0.055 mg) 📚 172 studies (Tier A: 0, B: 67)

RDA 0.055mg This product: 0.045mg UL 0.4mg

Copper

2 mg (100% DV)

✅ 2.2× RDA — within safe limits 📚 36 studies (Tier A: 0, B: 11)

RDA 0.9mg This product: 2mg UL 10mg

Manganese

2 mg (100% DV)

✅ Within RDA (0.9× RDA of 2.3 mg) 📚 8 studies — no high-quality reviews

RDA 2.3mg This product: 2mg UL 11mg

Chromium

100 mcg (83% DV)

✅ 2.9× RDA — within safe limits 📚 197 studies (Tier A: 1, B: 55)

RDA 0.035mg This product: 0.1mg

Molybdenum

25 mcg (33% DV)

✅ Within RDA (0.6× RDA of 0.045 mg) 📚 2 studies — no high-quality reviews

RDA 0.045mg This product: 0.025mg UL 2mg

Caffeine

90 mg

📊 Market median: 180.0mg (239 products) 📚 43 studies (Tier A: 1, B: 19)

This product: 90mg UL 400mg

Other Ingredients

Calcium Carbonate Microcrystalline Cellulose Caffeine Magnesium Oxide Ascorbic Acid Niacinamide Ferrous Fumarate Less than 2% of:

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 (18 - 50 Years)

Product Information

📋 Directions for Use

Directions: Adults: One tablet daily, with food.

⚠️ Warnings & Precautions

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.

This product contains about as much caffeine as a cup of coffee (90 mg).

For adult use only.

If pregnant, breast-feeding or taking medication, ask a health professional before use.

Keep out of reach of children

Do not use this product if printed safety seal bearing "Bayer Health Care" under cap is torn or missing.

🧪 Formulation Notes

Formulated to support: Physical energy with high levels of B-Vitamins to help convert food to fuel Mental alertness with Caffeine Immune health with Vitamins C, A, Selenium and Zinc Bone health with Calcium, Vitamin D and Magnesium Refers to Vitamins B1, B2, B6, B12, Niacin, Folic Acid, Biotin and Pantothenic Acid.

This product contains about as much caffeine as a cup of coffee (90 mg).

That's why One A Day Energy is a complete multivitamin with key nutrients, including B-vitamins to help support physical energy by converting food to fuel, plus Caffeine to help support mental alertness.

Does not contain aspirin.

Additional Information

Complete multivitamin with more Formulated to support: Physical energy Mental alertness Immune health Bone health

Questions or comments? Please call 1-800-800-4793 (Mon - Fri 9AM - 5PM EST) Made in the USA of US & imported materials

A complete multivitamin that supports energy Being both physically and mentally active is important for supporting your healthy lifestyle.

Child resistant cap

83918950 3141

Supports physical energy & mental alertness

Product Details

UPC / SKU 0 16500 52586 8

DSLD Entry Date 2018-06-25

Product Type Other Combinations

Form Tablet or Pill

Brand Bayer One A Day

DSLD ID 178021

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 →