Sentry Senior

Sentry Senior

21st Century4.7 (15,949 ratings)
Format:Tablet Quantity: 265 Tablet(s) · 265 servings
Goals

Product analysis

56 out of 100

Sentry Senior offers inexpensive nutritional coverage that may help with tiredness related to low nutrient intake.

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

Nutrient Quality42

The mineral forms vary in their absorption potential, with favorable iodine and molybdenum forms alongside less favorable copper sulfate. Many other forms are named without a confirmed quality comparison.

Ingredient Transparency76

Ingredient amounts and most forms are stated, helping you identify the formula. The proportions of the vitamin A and calcium mixtures are missing.

Value For Money47

The daily serving is inexpensive, with favorable value for several minerals. Value for many other nutrients remains uncertain, so affordability does not settle every ingredient comparison.

Customer Satisfaction91

Customer feedback is very positive across many thousands of ratings. The large review base gives a broad picture of satisfaction without proving an energy benefit.

Product Focus35

The broad vitamin and mineral lineup fits general nutrition more than a narrowly targeted energy supplement. Its potential effect on tiredness depends on individual nutritional needs.

Format
Tablet
Container
265 Tablet(s)
Per serving
$0.06
Customer rating
4.7 · 15,949 ratings
Report analysis

Goals

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 · 25 mcgPotassium · 80 mg
Study evidence
Iodine Adverse 3 studies
Magnesium Supportive 4 studies
Potassium Supportive 2 studies
Thiamin Disputed 12 studies
Vitamin D Supportive 32 studies

Ingredients

IngredientAmount per servingScore
Vitamin A (Beta-Carotene, Vitamin A Acetate)
750 mcg
Vitamin C (Ascorbic Acid)
60 mg
Vitamin D3 (Cholecalciferol)
25 mcg
Vitamin E (DL-Alpha-Tocopheryl Acetate)
22.5 mg
Vitamin K (Phytonadione)
30 mcg
Thiamine (Thiamine Mononitrate)
1.5 mg
Riboflavin
1.7 mg
Niacin (Niacinamide)
20 mg
Vitamin B6 (Pyridoxine Hydrochloride)
3 mg
Folate
667 mcg DFE
Vitamin B12 (Cyanocobalamin)
25 mcg
Biotin
30 mcg
Pantothenic Acid (D-Calcium Pantothenate)
10 mg
Calcium (Calcium Carbonate, Dicalcium Phosphate)
225 mg 63
Phosphorus (Dicalcium Phosphate)
20 mg
Iodine (Potassium Iodide)
150 mcg 100
Magnesium (Magnesium Oxide)
50 mg
Zinc (Zinc Oxide)
11 mg
Selenium (Sodium Selenate)
19 mcg
Copper (Copper Sulfate)
0.5 mg 46
Manganese (Manganese Sulfate)
2.3 mg 70
Chromium (Chromium Picolinate)
50 mcg
Molybdenum (Sodium Molybdate)
45 mcg 64
Chloride (Potassium Chloride)
72 mg 81
Potassium (Potassium Chloride)
80 mg
Lutein
250 mcg
Lycopene
300 mcg
Gluten Free Seniors 50+
Report overview
A+ Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyA+ Value
Each serving provides 150 mcg of iodine from potassium iodide at a low cost per serving. The amount supports daily iodine intake. The amount and source are clearly stated.
How this ingredient is rated

Active Ingredient Quality & Bioavailability100

Potassium iodide supplies the iodine. The marine-specific purity concern does not apply.
Iodine Form & Bioavailability
The iodine comes from potassium iodide.
Marine Source Purity & Sourcing
The iodine is not identified as coming from a marine source, so the marine-specific purity concern does not apply.

Dose, Safety & Label Transparency100

The serving provides 150 mcg of iodine. The source is stated.
Dosage Efficacy for Daily Support
The 150 mcg serving provides iodine for daily thyroid and metabolic support.
Dosage Safety & Upper Limits
The 150 mcg serving is below the general adult upper intake level; individual needs can differ.
Elemental Iodine Transparency
Both the iodine amount and its potassium iodide source are stated.

Value100

The cost per serving is low.
Price Per Effective Serving
The cost per serving is low.
C+ Active Ingredient Quality & BioavailabilityD- Dose, Safety & Label TransparencyA+ Value
A serving provides a 225 mg of calcium at a low cost per serving. The calcium comes from Calcium Carbonate and Dicalcium Phosphate, in undisclosed proportions. A listed artificial additive is present.
How this ingredient is rated

Active Ingredient Quality & Bioavailability65

The label states the calcium amount and sources. The proportions of the forms are unknown.
Calcium Form & Absorption Potential
The calcium comes from Calcium Carbonate and Dicalcium Phosphate, in undisclosed proportions.
Elemental Calcium Transparency
The label states 225 mg of calcium and its sources.

Dose, Safety & Label Transparency42

A serving provides 225 mg of calcium. A listed artificial additive is present.
Absorption-Optimized Serving Dose
A serving provides a 225 mg of calcium.
Formulation Purity & Additives
A listed artificial additive is present.

Value100

The cost per serving is low.
Price Per Serving Efficiency
The cost per serving is low.
B+ Active Ingredient Quality & BioavailabilityB- Dose, Safety & Label TransparencyA+ Value
Sentry Senior provides 72 mg of chloride per serving, a moderate amount, at a low cost per serving. The listed chloride source is Potassium Chloride.
How this ingredient is rated

Active Ingredient Quality & Bioavailability80

The listed chloride source is Potassium Chloride.
Chloride source quality
The listed chloride source is Potassium Chloride.

Dose, Safety & Label Transparency72

The serving provides 72 mg of chloride, a moderate amount. Its salt source is also listed.
Chloride amount per serving
Each serving provides 72 mg of chloride, a moderate amount.
Amount and source disclosure
The chloride amount and its salt source are listed.

Value100

The cost per serving is low.
Price per serving
The cost per serving is low.
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. 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
  5. 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
  6. Red blood cell magnesium and chronic fatigue syndrome.
    Cox IM; Campbell MJ; Dowson D · Lancet (London, England) · 1991
    Randomized trial32 participantsEnergy forMagnesium
  7. Exercise, magnesium and immune function.
    Laires MJ; Monteiro C · Magnesium research · 2008
    Narrative reviewEnergy forMagnesium
  8. [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
  9. 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
  10. 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
  11. 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
  12. 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
  13. 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
  14. 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
  15. 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
  16. Randomised clinical trial: high-dose oral thiamine versus placebo for chronic fatigue in patients with quiescent inflammatory bowel disease.
    Bager P; Hvas CL; Rud CL; Dahlerup JF · Alimentary pharmacology & therapeutics · 2021
    Randomized trial40 participantsEnergy forThiamin
  17. Dietary reference values for thiamin.
    EFSA Panel on Dietetic Products, Nutrition and Allergies (NDA); Turck D; Bresson JL; Burlingame B; Dean T; Fairweather-Tait S; Heinonen M; Hirsch-Ernst KI; Mangelsdorf I; McArdle HJ; Naska A; Nowicka G; Pentieva K; Sanz Y; Siani A; Sjödin A; Stern M; Tomé D; Van Loveren H; Vinceti M; Willatts P; Lamberg-Allardt C; Przyrembel H; Tetens I; Gudelj Rakic J; Ioannidou S; de Sesmaisons-Lecarré A; Forss AC; Neuhäuser-Berthold M · EFSA journal. European Food Safety Authority · 2026
    Guideline / consensusEnergy forThiamin
  18. Effects of thiamine supplementation on exercise-induced fatigue.
    Suzuki M; Itokawa Y · Metabolic brain disease · 1996
    Randomized trial16 participantsEnergy forThiamin
  19. Long-term maintenance treatment with 300 mg thiamine for fatigue in patients with inflammatory bowel disease: results from an open-label extension of the TARIF study.
    Bager P; Hvas CL; Rud CL; Dahlerup JF · Scandinavian journal of gastroenterology · 2022
    Randomized trialEnergy forThiamin
  20. A new perspective on vitamin B12 deficiency in rheumatology: a case-based review.
    Dułak NA; Rytlewska M; Jaskólska M; Chmielewski M · Rheumatology international · 2024
    Case series3 participantsEnergy forVitamin B12