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Energy

product on market Tablet or Pill Bayer One A Day Safety: 99/100
99/100

This product looks safe

  • Niacin: 40mg is 1.1× the Tolerable Upper Intake Level (35mg)
  • 66% of ingredients have research evidence
C Label Compliance Grade

What the Evidence Says

✨ AI-generated · Qwen 3.6 · methodology

The formulation contains a blend of essential vitamins, including A, C, D, E, and K, which support immune function and bone health. There is strong research evidence supporting the physiological roles of these nutrients in maintaining general health. The ingredient profile demonstrates a high safety score with minimal reported concerns.

AI-generated summary based on research evidence. Not medical advice.

Alerts

Safety Alerts

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

Label

Product Label

Label for Energy
Open Full PDF View on NIH DSLD →
Details

Label Data

1 Tablet(s)
Serving Size
Other Combinations
Product Type
66%
Evidence Coverage
Ingredients

Supplement Facts — Evidence Check

Vitamin A
3500 IU (70% DV)
Vitamin C
60 mg (100% DV)
400 IU (100% DV)
Within RDA (0.7× RDA) 608 studies (A:16, B:251)
22.5 IU (75% DV)
Within RDA (1.0× RDA) 179 studies (A:3, B:90)
25 mcg (31% DV)
Within RDA (0.2× RDA) 275 studies (A:9, B:175)
3 mg (200% DV)
2.5× RDA — within safe limits 76 studies (A:0, B:33)
3.4 mg (200% DV)
2.6× RDA — within safe limits 13 studies (A:0, B:1)
40 mg (200% DV)
Exceeds UL by 1.1× (UL: 35 mg) 196 studies (A:5, B:63)
4 mg (200% DV)
3.1× RDA — above typical dose (UL: 100 mg) 114 studies (A:3, B:35)
400 mcg (100% DV)
Within RDA (1.0× RDA) 226 studies (A:10, B:105)
12 mcg (200% DV)
5.0× RDA — above typical dose 139 studies (A:1, B:44)
300 mcg (100% DV)
10.0× RDA — above typical dose 27 studies (A:0, B:11)
10 mg (100% DV)
2.0× RDA — within safe limits 2 studies — no high-quality reviews
Calcium
250 mg (25% DV)
Iron
9 mg (50% DV)
150 mcg (100% DV)
Within RDA (1.0× RDA) 245 studies (A:4, B:133)
40 mg (10% DV)
Within RDA (0.1× RDA) 316 studies (A:8, B:159)
15 mg (100% DV)
1.4× RDA — within safe limits 263 studies (A:6, B:134)
45 mcg (64% DV)
Within RDA (0.8× RDA) 173 studies (A:0, B:67)
2 mg (100% DV)
2.2× RDA — within safe limits 37 studies (A:0, B:11)
2 mg (100% DV)
Within RDA (0.9× RDA) 9 studies — no high-quality reviews
100 mcg (83% DV)
2.9× RDA — within safe limits 199 studies (A:1, B:55)
25 mcg (33% DV)
Within RDA (0.6× RDA) 3 studies — no high-quality reviews
99.3 mg (3% DV)
Market median: 4002.0mg (1 products) 21 studies (A:0, B:2)
Potassium
99 mg (3% DV)
Nickel
5 mcg
Tin
10 mcg
5 mg
Market median: 108.0mg (8 products) 9 studies (A:0, B:4)
90 mg
Market median: 180.0mg (239 products) 49 studies (A:1, B:19)

Other Ingredients

Calcium Carbonate Potassium Chloride Microcrystaline Cellulose Guarana seed powder Caffeine Magnesium Oxide Ascorbic Acid Niacinamide Less than 2% of
Claims

Label Claims — Verification

Unverified Nutrient
Unverified All Other
Unverified Structure/Function
Info

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.

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

Keep out of reach of children Child resistant cap

Formulation Notes

An active lifestyle may need energy support. One A Day Energy can help. It's designed with B-Vitamins which help convert food to energy, and caffeine to help support mental alertness.

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

Additional Information

Questions or comments? Please call 1-800-800-4793 (Mon-Fri 9AM - 5 PM EST)

Metadata

Product Details

DSLD Entry Date2020-11-21
Product TypeOther Combinations
FormTablet or Pill
BrandBayer One A Day
DSLD ID239417
Data Updated2026-04-11
Research

Research Evidence

337
Research Sources
54
Avg Quality
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
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
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
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
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
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 →
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This product page is for informational purposes only and does not constitute medical advice. Always consult your healthcare provider before taking any supplement.