Sentry Adults

Name: Sentry Adults
Brand: 21st Century
SKU: 1lAYANvB
Rating: 4.7 (25507 reviews)

21st Century

4.7

★ ★ ★ ★ ★

(25507 ratings)

Iodine 150 mcg

Chloride 72 mg

Iron 18 mg

Manganese 2.3 mg

Molybdenum 45 mcg

Score

A bulk-size multivitamin that offers great value and broad nutritional support for daily vitality.

How scoring works

Quantity:300 Tablet(s) • (300 servings)

Goals:

Energy

Hair Health

Productivity Boost

Score 93

A bulk-size multivitamin that offers great value and broad nutritional support for daily vitality.

How scoring works

Also available as

1 option

130 servings 1 Tablet(s) • 130 Tablet(s) • 130 servings $8.99 ($0.06 per serving)

$16.99($0.05 per serving)

iHerb	$ 16.99
Amazon	$ 16.99

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Analysis

This high-count version of the adult multivitamin is designed for long-term consistency. It provides all the essential vitamins, including 18 mg of iron for energy and healthy hair support. The formula also features iodine and chloride to help with metabolic health and electrolyte balance.

It is a practical choice for budget-conscious families or individuals who want a simple daily habit. While the tablet form is basic, it offers high transparency and a reliable source of daily minerals. This is one of the most cost-effective ways to get a broad range of nutrients.

Pros

Exceptional value with 300 servings
18 mg iron for energy support
High label transparency
Comprehensive mineral mix

Cons

Calcium and iron compete for absorption
Tablet may be difficult for some

Warnings

Keep away from children due to iron content
Check with a doctor if you have mineral processing issues

Nutrient quality

Highest impact

Uses standard mineral forms like potassium chloride and magnesium oxide for foundational nutrient delivery. Dosages are appropriately balanced for general maintenance in healthy adults without excessive risk.

Ingredient transparency

Highest impact

Dosages for active ingredients are clearly identified, providing clarity for consumer tracking. Labeling is straightforward regarding usage and serving size, ensuring consumers know exactly what they are taking.

Customer satisfaction

Highest impact

Massive review volume and high ratings confirm strong consumer trust and product efficacy. Consistency in feedback suggests that users find the tablet reliable and effective for long-term health maintenance.

Value for money

Highest impact

Outstanding cost per serving provides exceptional value for a comprehensive nutrient profile. The price point is extremely competitive, making routine mineral support highly accessible for all consumers.

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Goals

Selected only

Energy

Impact

High effect

B-

Goal Fit

Strength of Support

Coverage

B+

Formula Quality

This bulk-sized multivitamin offers a reliable daily dose of iron and iodine to support oxygenation and thyroid-related metabolic rates. A complete B-complex is included to facilitate the conversion of carbohydrates and fats into usable cellular fuel.

The formulation serves as a cost-effective strategy for addressing common nutrient deficiencies that can lead to fatigue. It appears well aligned with sustaining mental and physical vitality for broad adult use.

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Hair Health

Impact

Moderate effect

B+

Goal Fit

C-

Strength of Support

C-

Coverage

Formula Quality

Iron and iodine meaningfully support the oxygenation of hair follicles and thyroid-regulated growth cycles. These nutrients appear well aligned for those addressing common nutritional deficiencies linked to diffuse hair shedding.

Biotin and zinc are present at token levels that likely do not contribute significantly to hair thickness or structural strength. High amounts of calcium carbonate are included, which could impede the absorption of iron if not timed correctly for maximum efficacy.

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Productivity Boost

Impact

Lower effect

Goal Fit

Strength of Support

Coverage

D+

Formula Quality

This bulk-size multivitamin provides foundational nutrients like iron and B-vitamins to support general energy levels. However, the B12 dosage (6mcg) is included at maintenance levels that are unlikely to provide a significant productivity boost.

Absorption of the 18mg of iron is significantly compromised by the 400mg of calcium present in the tablet. The formula provides broad wellness support but lacks the specific potency or bioactive forms required for acute focus.

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Ingredients

Display goals

Ingredient	Amount per serving
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, Vitamin B1)	1.5 mg
Riboflavin (Vitamin B2)	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
Phosphorus (Dicalcium Phosphate)	20 mg
Iodine (Potassium Iodide)	150 mcg
Magnesium (Magnesium Oxide)	50 mg
Zinc (Zinc Oxide)	11 mg
Selenium (Sodium Selenate)	55 mcg
Copper (Copper Sulfate)	0.5 mg
Manganese (Manganese Sulfate)	2.3 mg
Chromium (Chromium Picolinate)	35 mcg
Molybdenum (Sodium Molybdate)	45 mcg
Chloride (Potassium Chloride)	72 mg
Potassium (Potassium Chloride)	80 mg

Report overview

Iodine (Potassium Iodide) · 150 mcg OverallScore

A+

Active Ingredient Quality & Bioavailability

A+

Dose, Safety & Label Transparency

A+

Value

This bulk-size multivitamin offers a standard dose of iodine in a reliable salt form. It provides consistent thyroid support at a very low cost for the budget-conscious consumer.

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Chloride (Potassium Chloride) · 72 mg OverallScore

Active Ingredient Quality & Bioavailability

B-

Dose, Safety & Label Transparency

A+

Value

This high-count version of Sentry Adults provides a reliable dose of chloride in a highly transparent and affordable package. While the tablet format is a standard drawback, the use of potassium chloride is a high-quality choice for a value-oriented multivitamin.

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Iron (Ferrous Fumarate) · 18 mg OverallScore

Active Ingredient Quality & Bioavailability

A+

Dose, Safety & Label Transparency

A+

Value

This bulk-size multivitamin offers the same effective iron dose and high affordability as the smaller count. Absorption remains the main concern due to high calcium competition and a basic iron compound form.

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