Sentry Adults

Sentry Adults

21st Century4.7 (26,138 ratings)
Format:Tablet Quantity: 130 Tablet(s) · 130 servings
Goals
$8.99 $0.06 per serving

Product analysis

57 out of 100

Sentry Adults offers broad vitamin and mineral support for everyday dietary gaps, including nutrients used in energy production and normal immune function. Missing details on some forms and blends make its quality harder to compare.

AI assessment of the formula, label and price. How scoring works

Nutrient Quality40

Nutrient forms are mixed in quality, with iodine among the favorable choices and selenium and copper less favorable. Unspecified folate and biotin forms also leave part of the formula harder to compare.

Ingredient Transparency78

All nutrient amounts and most forms are disclosed, making daily intake easier to check. The folate and biotin forms and the proportions within the vitamin A and calcium blends are missing.

Value For Money52

Several minerals compare favorably on cost, while selenium offers more moderate value. Value across much of the remaining formula is uncertain, so the whole blend cannot be compared confidently.

Customer Satisfaction91

Customer satisfaction is strongly positive across a very large number of ratings. The large feedback base gives a broad view of reception without confirming the claimed nutritional benefits.

Product Focus39

The broad formula is mainly suited to filling everyday nutritional gaps. Its many ingredients also touch on hair, energy and concentration, but those benefits depend largely on inadequate intake.

Format
Tablet
Container
130 Tablet(s)
Per serving
$0.06
Customer rating
4.7 · 26,138 ratings
Report analysis

Goals

Immunity
Impact
Highest effect
C- Ingredient FitA+ PathwaysA+ EvidenceA+ Formulation Logic
Magnesium · 50 mgVitamin C · 60 mgZinc · 11 mgVitamin A · 1050 mcgVitamin D · 25 mcgSelenium · 55 mcg

Vitamin A supports protective barriers, with zinc, vitamin D and selenium contributing to normal immune function. Iron, copper, folate, B6 and B12 can help fill dietary gaps that impair immune cells, without establishing added benefit when intake is adequate. Vitamin C and magnesium are below the saved minimum amount criterion. Vitamin E receives an allowance despite limited routine immunity evidence.

How this product is rated for Immunity

Ingredient fit59

The relevant nutrients receive the main ingredient allowances. Amounts vary in how fully they meet the saved comparison ranges.
Goal fit
The relevant nutrients supply the main saved ingredient focus; other actives and the product’s wider purposes affect specificity.
Dose adequacy
The declared amounts receive partial or mixed allowances, limiting the saved contribution without proving the ingredients ineffective.

Pathways96

The strongest saved contribution concerns lymphocyte function and immune regulation. The saved findings span the target range of immune functions.
Depth
The strongest saved contribution concerns lymphocyte function and immune regulation.
Breadth
The saved findings identify meaningful coverage of barrier and antimicrobial defense, lymphocyte function and immune regulation, oxidative and inflammatory balance.

Evidence100

The strongest relevant support concerns normal nutrient function or regular vitamin C use, rather than general infection prevention.
Evidence strength
The strongest relevant support concerns normal nutrient function or regular vitamin C use, rather than general infection prevention.
Studied preparation
The relevant preparations receive the saved comparison allowance, without establishing clinical superiority over alternative forms.

Formulation logic100

The counted ingredients meet the minimum amount criterion and have no missing required partner or identified configured conflict.
Partner coverage
No required partner is missing for the ingredients counted in the saved findings.
Conflicts
No configured ingredient conflict was identified; this does not establish individual suitability.
Effective doses
The ingredients counted here meet the saved minimum amount criterion; this comparison threshold does not prove clinical effectiveness.
Study evidence
Iron Supportive 23 studies
Magnesium Supportive 8 studies
Selenium Mixed 37 studies
Vitamin A Supportive 107 studies
Vitamin C Supportive 53 studies
Vitamin D Supportive 85 studies
Vitamin E Supportive 21 studies
Zinc Supportive 73 studies
Everyday Health
Impact
Highest effect
A- Ingredient FitA+ PathwaysB+ EvidenceA+ Formulation Logic
Folate · 667 mcg DFEVitamin B12 · 6 mcgVitamin D · 25 mcgMagnesium · 50 mgVitamin K · 25 mcgSelenium · 55 mcgZinc · 11 mgVitamin C · 60 mg

B vitamins provide nutrients used in normal energy metabolism; Vitamin B9 (Folate) provide nutrients used in blood formation; Vitamin D contribute to bone and mineral nutrition; Zinc and Selenium contribute to normal antioxidant and immune functions; iodine helps fill a dietary gap relevant to normal thyroid function; iron can help address low intake that contributes to iron deficiency. These nutritional contributions are useful when intake falls short; extra benefit above adequate intake is not established.

How this product is rated for Everyday Health

Ingredient fit86

Vitamin B1 (Thiamin), Vitamin B2 (Riboflavin), Vitamin B3 (Niacin), Vitamin B5 (Pantothenic Acid), Vitamin B9 (Folate), Vitamin B6, Vitamin D, Zinc, Selenium, Iron and Iodine supply the main nutritional contributions.
Goal fit
The relevant nutrients address several ordinary nutritional needs.
Dose adequacy
The relevant serving amounts make unequal contributions, with some below the saved comparison endpoints.

Pathways100

The strongest supported area is energy metabolism cofactors.
Depth
The strongest supported area is energy metabolism cofactors.
Breadth
The broader contribution covers energy metabolism cofactors, one-carbon metabolism and blood formation, antioxidant and immune defence.

Evidence82

The nutrient findings concern filling dietary gaps, with no established extra benefit when intake is adequate.
Evidence strength
Vitamin B9 (Folate) leads the saved comparison; the supported contribution is nutritional availability when intake is low.
Studied preparation
The saved findings accept the relevant preparations; this does not demonstrate superior forms or improved outcomes in adequately nourished adults.

Formulation logic100

The relevant ingredients have no missing required partners or triggered listed conflicts.
Partner coverage
The relevant ingredients can contribute independently or have their required partners; this does not establish an added combination benefit.
Conflicts
No listed ingredient conflict was triggered by the supplied facts.
Effective doses
All ingredients retained in this finding meet its amount threshold; that threshold is not a proven clinical dose.
Study evidence
Folate Supportive 80 studies
Magnesium Supportive 114 studies
Selenium Supportive 70 studies
Vitamin C Supportive 56 studies
Vitamin D Supportive 115 studies
Vitamin K Supportive 34 studies
Zinc Supportive 60 studies
Hair Health
Impact
High effect
C Ingredient FitF PathwaysA+ EvidenceA+ Formulation Logic
Biotin · 30 mcgVitamin D · 25 mcgZinc · 11 mgIron · 18 mgVitamin C · 60 mg

Zinc, iron and biotin can help address low intake that contributes to diffuse hair shedding. This role concerns nutrient sufficiency, with no established extra regrowth benefit when intake is adequate. The declared nutrients cover different dietary gaps, rather than establishing a combined hair-growth effect.

How this product is rated for Hair Health

Ingredient fit62

Zinc, iron and biotin are relevant to nutrient-related shedding within a broader formula. The useful role depends on the cause of shedding and nutrient intake.
Goal fit
Zinc, iron and biotin are relevant to nutrient-related shedding within a broader formula.
Dose adequacy
The serving provides varying nutrient amounts; larger quantities do not establish proportionally greater hair regrowth.

Pathways18

The strongest saved connection concerns antioxidant protection around follicles; normal antioxidant roles do not establish hair regrowth. The findings do not establish broad pathway coverage.
Depth
The strongest saved connection concerns antioxidant protection around follicles; normal antioxidant roles do not establish hair regrowth.
Breadth
None of the examined areas has enough contribution for broad coverage.

Evidence97

Zinc leads the saved findings, while its useful hair role centers on correcting low intake associated with shedding. The findings do not demonstrate routine regrowth in adults with adequate intake.
Evidence strength
Zinc leads the saved findings, while its useful hair role centers on correcting low intake associated with shedding.
Studied preparation
Iodine does not meet the reviewed preparation criteria; other counted ingredients meet those criteria without proving regrowth.

Formulation logic100

The counted ingredients have their required partners and no evaluated conflict was identified. The amount threshold does not establish a proven hair-growth regimen.
Partner coverage
The counted ingredients do not lack a required partner; this does not demonstrate additional hair benefit from combining them.
Conflicts
No evaluated ingredient conflict was identified in the supplied facts.
Effective doses
The counted ingredients meet the comparison’s amount threshold; this does not establish an effective hair-growth dose.
Study evidence
Biotin Supportive 4 studies
Copper Adverse 4 studies
Folate Mixed 15 studies
Iodine No effect 1 study
Iron Disputed 25 studies
Niacin Disputed 2 studies
Selenium Disputed 7 studies
Vitamin A Disputed 13 studies
Vitamin D Disputed 34 studies
Vitamin E No effect 3 studies
Zinc Supportive 22 studies
Impact
Moderate effect
C Ingredient FitF PathwaysA+ EvidenceA+ Formulation Logic
Iodine · 150 mcgVitamin D · 25 mcgVitamin B5 · 10 mgMagnesium · 50 mgRiboflavin · 1.7 mgThiamin · 1.5 mgVitamin B12 · 6 mcgIron · 18 mgPotassium · 80 mg

B vitamins support normal energy metabolism, while folate and vitamin B12 help maintain normal blood formation. Their energy relevance is mainly nutritional: helping meet needs can matter when intake is low, while high amounts do not promise extra energy once needs are met. Iron at 18 mg supports oxygen transport, alongside smaller magnesium and vitamin C contributions.

How this product is rated for Energy

Ingredient fit63

Energy-related ingredients share the formula with ingredients aimed at other health goals. The assessed amounts provide partial coverage of the saved references.
Goal fit
Energy-related ingredients share the formula with ingredients aimed at other health goals.
Dose adequacy
The assessed amounts provide partial coverage of the saved references.

Pathways0

The main contribution is nutritional support rather than a specific assessed performance mechanism. The saved findings show limited coverage across specific energy-performance processes.
Depth
The main contribution is nutritional support rather than a specific assessed performance mechanism.
Breadth
The saved findings show limited coverage across specific energy-performance processes.

Evidence97

Iron provides the strongest evidence contribution among the assessed ingredients, within the supplied evidence's limits. Preparation matching is incomplete for Iodine, limiting direct application of the reviewed findings.
Evidence strength
Iron provides the strongest evidence contribution among the assessed ingredients, within the supplied evidence's limits.
Studied preparation
Preparation matching is incomplete for Iodine, limiting direct application of the reviewed findings.

Formulation logic100

The assessed ingredients can contribute individually or have their required companion present. No configured ingredient conflict was identified in the supplied assessment. All ingredients counted in this finding meet the saved minimum amount threshold.
Partner coverage
The assessed ingredients can contribute individually or have their required companion present.
Conflicts
No configured ingredient conflict was identified in the supplied assessment.
Effective doses
All ingredients counted in this finding meet the saved minimum amount threshold.
Study evidence
Iodine Adverse 3 studies
Iron Supportive 74 studies
Magnesium Supportive 4 studies
Potassium Supportive 2 studies
Thiamin Disputed 12 studies
Vitamin D Supportive 32 studies
Productivity Boost
Impact
Moderate effect
D- Ingredient FitF PathwaysA EvidenceA+ Formulation Logic
Iron · 18 mgVitamin B12 · 6 mcgVitamin B12 · 6 mcgVitamin B6 · 2 mgZinc · 11 mgMagnesium · 50 mg

B vitamins support energy metabolism and neurotransmitter function. Iron at 18 mg, folate and B12 can matter for fatigue and concentration when nutrient status is low, with zinc adding nutritional support. Extra nutrient intake does not imply better productivity in someone already meeting their needs.

How this product is rated for Productivity Boost

Ingredient fit42

The relevant ingredients sit within a broader mix aimed at several needs. The assessed amounts are relatively modest against the saved comparison benchmarks.
Goal fit
The relevant ingredients sit within a broader mix aimed at several needs.
Dose adequacy
The assessed amounts are relatively modest against the saved comparison benchmarks.

Pathways13

The strongest assessed area is synaptic plasticity and neuroprotection, with limited coverage. None of the assessed areas reaches the saved threshold for substantial coverage.
Depth
The strongest assessed area is synaptic plasticity and neuroprotection, with limited coverage.
Breadth
None of the assessed areas reaches the saved threshold for substantial coverage.

Evidence91

Zinc provides the strongest evidence contribution among the assessed ingredients; its relevance to everyday productivity remains qualified. The assessed ingredients meeting the amount threshold match the preparations recognized in the saved findings.
Evidence strength
Zinc provides the strongest evidence contribution among the assessed ingredients; its relevance to everyday productivity remains qualified.
Studied preparation
The assessed ingredients meeting the amount threshold match the preparations recognized in the saved findings.

Formulation logic100

The assessed ingredients can contribute independently or have their required partner. No configured ingredient conflict was matched in the supplied assessment. All ingredients included in this check reach its minimum amount threshold.
Partner coverage
The assessed ingredients can contribute independently or have their required partner.
Conflicts
No configured ingredient conflict was matched in the supplied assessment.
Effective doses
All ingredients included in this check reach its minimum amount threshold.
Study evidence
Iron Supportive 69 studies
Magnesium Supportive 10 studies
Zinc Supportive 11 studies

Ingredients

IngredientAmount per servingScore
Vitamin A (Beta-Carotene, Vitamin A Acetate)
1050 mcg
Vitamin C (Ascorbic Acid)
60 mg
Vitamin D3 (Cholecalciferol)
25 mcg
Vitamin E (DL-Alpha-Tocopheryl Acetate)
13.5 mg
Vitamin K (Phytonadione)
25 mcg
Thiamine (Thiamine Mononitrate)
1.5 mg
Riboflavin
1.7 mg
Niacin (Niacinamide)
20 mg
Vitamin B6 (Pyridoxine Hydrochloride)
2 mg
Folate
667 mcg DFE
Vitamin B12 (Cyanocobalamin)
6 mcg
Biotin
30 mcg
Pantothenic Acid (D-Calcium Pantothenate)
10 mg
Calcium (Calcium Carbonate, Dicalcium Phosphate)
200 mg
Iron (Ferrous Fumarate)
18 mg 73
Phosphorus (Dicalcium Phosphate)
20 mg
Iodine (Potassium Iodide)
150 mcg 100
Magnesium (Magnesium Oxide)
50 mg
Zinc (Zinc Oxide)
11 mg
Selenium (Sodium Selenate)
55 mcg 53
Copper (Copper Sulfate)
0.5 mg 46
Manganese (Manganese Sulfate)
2.3 mg 70
Chromium (Chromium Picolinate)
35 mcg
Molybdenum (Sodium Molybdate)
45 mcg 64
Chloride (Potassium Chloride)
72 mg 81
Potassium (Potassium Chloride)
80 mg
Gluten Free Adults 18–50
Report overview
A+ Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyA+ Value
Each serving supplies 150 mcg of iodine from potassium iodide, an amount aligned with the evaluation’s daily-support criterion. A whole-product serving costs about $0.07.
How this ingredient is rated

Active Ingredient Quality & Bioavailability100

Iodine is listed as potassium iodide. No marine source is recorded, so marine-specific sourcing is not assessed.
Iodine Form & Bioavailability
Iodine is listed as potassium iodide.
Marine Source Purity & Sourcing
No marine source is recorded, so the marine-specific check does not apply; this does not establish that contaminants are absent.

Dose, Safety & Label Transparency100

The label records 150 mcg of iodine per serving, an amount aligned with the evaluation’s daily-support criterion. The general safety check flags no excess.
Dosage Efficacy for Daily Support
The 150 mcg serving aligns with the evaluation’s daily-support criterion.
Dosage Safety & Upper Limits
The evaluation flags no excess for the 150 mcg serving under its general safety check.
Elemental Iodine Transparency
The label records 150 mcg of iodine and its source per serving.

Value100

A whole-product serving costs about $0.07.
Price Per Effective Serving
A whole-product serving costs about $0.07.
B+ Active Ingredient Quality & BioavailabilityB- Dose, Safety & Label TransparencyA+ Value
A serving provides 72 mg of chloride from potassium chloride. The whole-product serving costs about $0.07, which covers all of its ingredients.
How this ingredient is rated

Active Ingredient Quality & Bioavailability80

The recorded chloride source is potassium chloride.
Chloride source quality
The recorded chloride source is potassium chloride.

Dose, Safety & Label Transparency72

The chloride entry specifies 72 mg per serving and identifies potassium chloride as its source.
Chloride amount per serving
A serving provides 72 mg of chloride.
Amount and source disclosure
The chloride entry specifies 72 mg per serving and identifies potassium chloride as its source.

Value100

The whole-product serving costs about $0.07; that price is not allocated to chloride alone.
Price per serving
The listed whole-product serving costs about $0.07.
F Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyA+ Value
A serving provides 18 mg of iron from ferrous fumarate. Zinc is also listed, and the evaluation flags it as a possible competitor for iron absorption.
How this ingredient is rated

Active Ingredient Quality & Bioavailability31

The named iron source is ferrous fumarate. Zinc is also listed, and the evaluation flags it as a possible competitor for iron absorption.
Iron Chemical Form & Bioavailability
Ferrous fumarate is the named iron form; the available evaluation does not establish comparative absorption for this serving.
Absorption Support & Blocker Avoidance
Zinc is listed and flagged as potentially competing with iron absorption; vitamin C is also present.

Dose, Safety & Label Transparency100

A serving provides 18 mg of iron, and the recorded amount refers to iron rather than just a compound weight.
Elemental Iron Label Clarity
The recorded 18 mg is an iron amount, not merely the weight of an iron compound.
Dosage Effectiveness & Safety Range
A serving provides 18 mg of iron.

Value100

A whole-product serving costs about $0.07; that price covers the entire serving.
Price per Effective Serving
The price is about $0.07 per whole-product serving, not just for the iron.
Report alternatives

Sources

Published studies used for the product analysis and the top-ranked studies for each ingredient and goal.

  1. Association of radioactive iodine treatment with survivorship symptoms and primary care utilisation in women of reproductive age with thyroid cancer: a retrospective cohort study.
    Devanarayan P; Hartman M; Partin M · Family medicine and community health · 2026
    Cohort study10,882 participantsEnergy forIodine
  2. Energy level and fatigue after surgery for thyroid cancer: A population-based study of patient-reported outcomes.
    Hughes DT; Reyes-Gastelum D; Kovatch KJ; Hamilton AS; Ward KC; Haymart MR · Surgery · 2020
    Cohort study2,584 participantsEnergy forIodine
  3. Health-Related Quality of Life in Differentiated Thyroid Cancer Survivors: A Cross-Sectional Study From Turkey.
    Gültekin A; Kahraman MY; Şengöz T; Şimşek FS · Head & neck · 2026
    Cross-sectional study202 participantsEnergy forIodine
  4. Large-dose intravenous ferric carboxymaltose injection for iron deficiency anemia in heavy uterine bleeding: a randomized, controlled trial.
    Van Wyck DB; Mangione A; Morrison J; Hadley PE; Jehle JA; Goodnough LT · Transfusion · 2010
    Randomized trial477 participantsEnergy forIron
  5. The Effect of Parenteral or Oral Iron Supplementation on Fatigue, Sleep, Quality of Life and Restless Legs Syndrome in Iron-Deficient Blood Donors: A Secondary Analysis of the IronWoMan RCT.
    Macher S; Herster C; Holter M; Moritz M; Matzhold EM; Stojakovic T; Pieber TR; Schlenke P; Drexler C; Amrein K · Nutrients · 2021
    Randomized trial176 participantsEnergy forIron
  6. Ferric carboxymaltose vs. oral iron in the treatment of pregnant women with iron deficiency anemia: an international, open-label, randomized controlled trial (FER-ASAP).
    Breymann C; Milman N; Mezzacasa A; Bernard R; Dudenhausen J; FER-ASAP investigators · Journal of perinatal medicine · 2018
    Randomized trial252 participantsEnergy forIron
  7. Effect of iron therapy on fatigue symptoms in non-anaemic iron deficient women of reproductive age- A Randomized Controlled Trial.
    Sultana N; Bajwa FA; Sikandar MZ; Haider MM; Majeed T · JPMA. The Journal of the Pakistan Medical Association · 2026
    Randomized trial164 participantsEnergy forIron
  8. Intravenous iron isomaltoside treatment of women suffering from severe fatigue after postpartum hemorrhage.
    Holm C; Thomsen LL; Langhoff-Roos J · The journal of maternal-fetal & neonatal medicine : the official journal of the European Association of Perinatal Medicine, the Federation of Asia and Oceania Perinatal Societies, the International Society of Perinatal Obstetricians · 2019
    Randomized trial85 participantsEnergy forIron
  9. Magnesium-L-threonate improves sleep quality and daytime functioning in adults with self-reported sleep problems: A randomized controlled trial.
    Hausenblas HA; Lynch T; Hooper S; Shrestha A; Rosendale D; Gu J · Sleep medicine: X · 2025
    Randomized trial80 participantsEnergy forMagnesium
  10. Total magnesium intake and risk of frailty in older women.
    Struijk EA; Fung TT; Bischoff-Ferrari HA; Willett WC; Lopez-Garcia E · Journal of cachexia, sarcopenia and muscle · 2024
    Cohort study81,524 participantsEnergy forMagnesium
  11. Red blood cell magnesium and chronic fatigue syndrome.
    Cox IM; Campbell MJ; Dowson D · Lancet (London, England) · 1991
    Randomized trial32 participantsEnergy forMagnesium
  12. Exercise, magnesium and immune function.
    Laires MJ; Monteiro C · Magnesium research · 2008
    Narrative reviewEnergy forMagnesium
  13. [Efficacy of potassium N-acetylaminosuccinate (Cogitum) in the treatment of asthenic syndrome: results of double-blind placebo-controlled trial].
    Esin RG; Khayrullin IK; Esin OR; Fatykhova AF; Gismatullina EI; Isaeva YN · Zhurnal nevrologii i psikhiatrii imeni S.S. Korsakova · 2023
    Randomized trial37 participantsEnergy forPotassium
  14. Human resting energy expenditure in relation to dietary potassium.
    Dériaz O; Thériault G; Lavallée N; Fournier G; Nadeau A; Bouchard C · The American journal of clinical nutrition · 1991
    Randomized trial8 participantsEnergy forPotassium
  15. Physicochemical properties of and volatile compounds in riboflavin fortified cloudy apple juice; study of its effect on job fatigue among Egyptian construction workers.
    Fouad S; Ibrahim GE; Hussein AMS; Ibrahim FA; El Gendy A · Heliyon · 2021
    Non-randomized trialEnergy forRiboflavin
  16. Vitamin B status in patients with chronic fatigue syndrome.
    Heap LC; Peters TJ; Wessely S · Journal of the Royal Society of Medicine · 1999
    Case-control study30 participantsEnergy forRiboflavin
  17. B-vitamins, related vitamers, and metabolites in patients with quiescent inflammatory bowel disease and chronic fatigue treated with high dose oral thiamine.
    Bager P; Hvas CL; Hansen MM; Ueland P; Dahlerup JF · Molecular medicine (Cambridge, Mass.) · 2023
    Observational studyEnergy forRiboflavin
  18. Metabolic features of chronic fatigue syndrome.
    Naviaux RK; Naviaux JC; Li K; Bright AT; Alaynick WA; Wang L; Baxter A; Nathan N; Anderson W; Gordon E · Proceedings of the National Academy of Sciences of the United States of America · 2024
    Case-control study84 participantsEnergy forRiboflavin
  19. Effectiveness of Riboflavin in Inherited Metabolic Diseases: A Systematic Review
    Bregje Jaeger, Nina N Stolwijk, Femke Aaldering, Charlotte A Ruys, Marije Smits, Nicole I Wolf, Carla E M Hollak, Annet M Bosch · Journal of Inherited Metabolic Disease · 2026
    Systematic review381 studies pooledEnergy forRiboflavin
  20. Influence of thiamin supplementation on the health and general well-being of an elderly Irish population with marginal thiamin deficiency.
    Smidt LJ; Cremin FM; Grivetti LE; Clifford AJ · Journal of gerontology · 1991
    Randomized trial80 participantsEnergy forThiamin