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Magnesium 500 mg

Sundown
4.7
★ ★ ★ ★ ★
(30035 ratings)
Magnesium 500 mg
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Score86

A high-dose, budget-friendly magnesium oxide tablet for basic mineral support.

How scoring works
Quantity:180 Tablet(s) • (180 servings)
Goals:
Digestive Health
General Health
Energy
Heart Health
Cardiovascular Support
Stress Relief

Score 86

A high-dose, budget-friendly magnesium oxide tablet for basic mineral support.

How scoring works
$7.87($0.04 per serving)
Vitacost
$ 8.69
Amazon
$ 0.00
iHerb
$ 7.87
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Analysis

Providing 500mg of magnesium in a single tablet, this product uses the oxide form to offer a high elemental yield at a very low price. While oxide has limited systemic absorption, it is often effective for drawing water into the gut and promoting regularity.

It is a basic, no-frills supplement for those who want a strong dose without spending much money. It fits best for general health goals where high elemental content is prioritized over advanced chelation.

Pros

  • Very low price per serving
  • High 500mg elemental dose in one tablet
  • Large 180-count supply
  • Simple, single-ingredient formula

Cons

  • Oxide form has poor intestinal absorption
  • More likely to cause loose stools than other forms
  • Tablet can be somewhat chalky

Warnings

  • Taking 500mg at once may cause digestive urgency
  • Drink plenty of water throughout the day

Nutrient quality

69 High impact

Using magnesium oxide provides a high elemental weight but offers minimal systemic bioavailability. While the dosage is substantial, the inorganic form is prone to causing digestive irritation for many users.

Ingredient transparency

95 Highest impact

Labeling clearly identifies the mineral form and specifies the total elemental amount provided per tablet. Disclosure is adequate and follows standard industry practices for consumer information.

Customer satisfaction

93 Highest impact

Consistently strong ratings across a massive volume of reviews indicate reliable performance for general mineral needs. Feedback suggests the product is well-received for its cost-effectiveness and simple efficacy.

Value for money

89 Highest impact

Extremely low cost per serving makes this one of the most accessible mineral supplements available. While the mineral quality is basic, the affordability provides significant value for budget-conscious consumers.

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Goals

Impact
Highest effect
A- Goal FitB+ Strength of SupportC- CoverageA+ Formula Quality

Magnesium oxide is provided at 500mg to support bowel regularity and motility through osmotic action. This inorganic form is a standard intervention for promoting stool softening and relieving occasional constipation.

While effective for stool regulation, the oxide form has limited systemic bioavailability compared to chelated alternatives. It is most suitable for those seeking localized digestive support for regularity.

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Impact
High effect
A+ Goal FitC Strength of SupportC CoverageB+ Formula Quality

Magnesium is provided as magnesium oxide for foundational structural and metabolic health. This mineral is essential for hundreds of biological reactions contributing to systemic vitality.

Reliance on the oxide form results in lower systemic bioavailability for achieving peak mineral repletion.

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Impact
High effect
B+ Goal FitC+ Strength of SupportC CoverageA+ Formula Quality

Magnesium oxide is utilized in a 500mg dose to support essential cofactors for cellular ATP generation.

Poor systemic absorption of the oxide form significantly reduces its effectiveness for addressing fatigue.

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Impact
High effect
A- Goal FitB- Strength of SupportD CoverageA- Formula Quality

Magnesium Oxide is provided to support foundational heart rhythm and blood pressure regulation. While this form provides a high elemental yield, its systemic absorption is generally lower than other organic chelates.

Magnesium appears well-aligned for those seeking a basic mineral supplement for cardiovascular support. The single-ingredient formula ensures focused delivery of the mineral.

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Impact
High effect
B+ Goal FitC Strength of SupportD- CoverageA Formula Quality

This magnesium supplement provides a high dose of the elemental mineral in its oxide form. While it supports general heart rhythm and muscle function, its systemic bioavailability is quite low.

Magnesium is the sole active ingredient, provided at 500mg per tablet. This dosage is significant for those needing basic mineral support, though organic chelates would offer better absorption for cardiovascular tissue.

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Impact
High effect
C+ Goal FitC Strength of SupportD+ CoverageA Formula Quality

This high-dose Magnesium Oxide supplement provides 500mg per serving to support foundational health and the physiological stress response. Magnesium is a critical mineral for regulating neuronal excitability and promoting a state of calm in the body.

The use of magnesium oxide significantly limits the systemic bioavailability compared to more specialized organic chelates like glycinate or citrate. This formula appears more aligned with basic nutritional repletion than targeted, intensive stress relief.

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Ingredients

IngredientAmount per serving
Magnesium (Magnesium Oxide)
500 mg
Gluten Free Adults 18–50 Dairy Free Sugar Free Vegetarian
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F Active Ingredient Quality & BioavailabilityA- Dose, Safety & Label TransparencyD+ Value
This high-dose magnesium oxide tablet is a very inexpensive option for general supplementation. However, its low absorption rate and potential for causing laxative effects make it less ideal for systemic magnesium repletion.
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