SuppHelper
search
Home›Supplements›Mineral›Magnesium›Magnesium Oxide Douglas Laboratories
Product Image

Magnesium Oxide

Douglas Laboratories
4.7
★ ★ ★ ★ ★
(24 ratings)
Magnesium 300 mg
Product Image
Score 60

A high-dose magnesium oxide product that is economical and often used for digestive regularity, though its systemic absorption may be limited.

scaleQuantity:100 Capsule(s) • (100 servings)
track_changesGoals:
flag Digestive Health
flag General Health
flag Bone Health
flag Cardiovascular Support
flag Fitness
flag Heart Health
flag Anti-Aging
flag Brain Health

leaderboard Score 60

A high-dose magnesium oxide product that is economical and often used for digestive regularity, though its systemic absorption may be limited.

insightsAnalysis

This product delivers 300 mg of elemental magnesium in the oxide form. Magnesium oxide has a high elemental magnesium content by weight, meaning you get a lot of magnesium for the size of the pill. However, it's known to have lower absorption rates compared to other forms like citrate or glycinate for systemic effects.

It's often favored when a laxative effect is desired, but for those primarily seeking to increase magnesium levels throughout the body for general health benefits, other forms may be more efficient. The capsule form is standard and easy to take, and the price per serving is quite economical.

thumb_upPros
  • Provides a high elemental dose of magnesium.
  • Very economical price per serving.
  • Often effective for promoting digestive regularity.
  • Standard and easy-to-take capsule form.
thumb_downCons
  • Generally lower bioavailability for systemic absorption compared to other forms.
  • Higher potential for gastrointestinal upset or laxative effect at this dosage if not intended.
warningWarnings
  • Magnesium oxide can have a strong laxative effect; start with a lower dose to assess tolerance.
  • Individuals with kidney issues should exercise caution with high-dose magnesium supplements and consult a professional.
  • Can interact with certain medications, including antibiotics and bone density medications.
flagReport analysis
$11.50($0.11 per serving)
Vitacost
$ 11.50
Pure Formulas
$ 11.50
flagReport prices
track_changesGoals
flagDigestive Health
Impact
Highest effect
Magnesium oxide is highly effective at drawing water into the bowels, making it a common and strong choice for promoting digestive regularity. This is its primary strength.
View goal →
flagGeneral Health
Impact
High effect
While it provides a large amount of elemental magnesium, its lower systemic bioavailability means that for broad general health benefits, other forms might be more effective at raising overall magnesium levels in the body.
View goal →
flagHeart Health
Impact
Moderate effect
While magnesium is important for heart health, the oxide form's lower systemic absorption means it may be less effective for robust cardiovascular support compared to more bioavailable forms.
View goal →
flagCardiovascular Support
Impact
Moderate effect
Magnesium is beneficial for the heart, but the oxide form is not typically the first choice for comprehensive cardiovascular support due to its relatively poor absorption into the bloodstream for systemic effects.
View goal →
flagFitness
Impact
Moderate effect
Magnesium is key for muscle function, but the limited systemic absorption of magnesium oxide means it might not be the most efficient form for supporting muscle recovery or energy for intense physical activity.
View goal →
flagBone Health
Impact
Moderate effect
Magnesium is important for bones, but for building bone mineral density, a form with higher systemic absorption would generally be preferred to ensure sufficient magnesium reaches bone tissue.
View goal →
flagAnti-Aging
Impact
Moderate effect
Magnesium is involved in cellular processes, but the lower bioavailability of magnesium oxide might limit its full contribution to overall cellular vitality and anti-aging goals compared to other forms.
View goal →
flagCognitive Support
Impact
Moderate effect
Magnesium's role in brain function is important, but magnesium oxide's lower systemic uptake makes it a less optimal choice for targeting cognitive support compared to forms that cross the blood-brain barrier more readily.
View goal →
scienceIngredients
IngredientAmount per serving
Magnesium
300 mg
grain_off Gluten Free person Adults 18–50
flagReport overview
Magnesium 60
As a magnesium product, it provides a high elemental amount, but its oxide form means it's often more beneficial for digestive regularity than for broad systemic magnesium replenishment. It serves a specific niche within the magnesium category.
scienceView ingredientinventory_2View products
inventory_2Alternative products
75 Value

Magnesium Complex 500 mg

Nature's Way
4.8
★★★★★
(7940 ratings)
Provides a good mix of magnesium citrate and oxide, offering improved bioavailability over pure oxide at a very fair price (reused for comprehensive coverage).
Other sellers (3)
75 Value

Sentry Senior Women's 50+

21st Century
4.7
★★★★★
(21237 ratings)
A comprehensive multivitamin with magnesium, offering broad nutritional benefits and good value for money (reused for comprehensive coverage).
Other sellers (3)
72 Value

One Daily Men's Health with Lycopene

21st Century
4.7
★★★★★
(29469 ratings)
A multivitamin with magnesium and lycopene, providing comprehensive nutrient support at an excellent price point (reused for comprehensive coverage).
Other sellers (1)
90 Performance

Chelated Magnesium 133 mg

Swanson
4.8
★★★★★
(10236 ratings)
Contains TRAACS Magnesium Bisglycinate Chelate, a superior and highly absorbable magnesium form, ideal for those seeking maximum efficacy (reused for comprehensive coverage).
Other sellers (0)
85 Performance

Vegan Cal Mag Plus

DEVA
4.7
★★★★★
(899 ratings)
A premium blend of chelated magnesium with calcium and vitamins D2/K, offering comprehensive mineral support (reused for comprehensive coverage).
Other sellers (4)
82 Performance

Magnesium Citrate Pure Powder

Best Naturals
4.4
★★★★★
(126 ratings)
Offers magnesium citrate, a highly bioavailable form, in a versatile powder format, ideal for custom dosing and absorption (reused for comprehensive coverage).
Other sellers (0)
45 Budget

Magnesium Oxide Pure Powder

NOW
4.5
★★★★★
(1184 ratings)
Significantly cheaper per serving, offering a basic magnesium oxide form for maximum affordability (reused for comprehensive coverage).
Other sellers (4)
55 Budget

Magnesium 500 mg

Nature's Bounty
4.8
★★★★★
(8299 ratings)
Provides a high dose of magnesium oxide at a much lower cost, making it a very economical choice despite its form (reused for comprehensive coverage).
Other sellers (3)
65 Budget

Magnesium 250 mg

21st Century
4.7
★★★★★
(70201 ratings)
Offers a solid dose of magnesium oxide at a very low price, presenting a cost-effective alternative for general use (reused for comprehensive coverage).
Other sellers (0)
75 Value

Magnesium Complex 500 mg

Nature's Way
4.8
★★★★★
(7940 ratings)
Provides a good mix of magnesium citrate and oxide, offering improved bioavailability over pure oxide at a very fair price (reused for comprehensive coverage).
Other sellers (3)
75 Value

Sentry Senior Women's 50+

21st Century
4.7
★★★★★
(21237 ratings)
A comprehensive multivitamin with magnesium, offering broad nutritional benefits and good value for money (reused for comprehensive coverage).
Other sellers (3)
72 Value

One Daily Men's Health with Lycopene

21st Century
4.7
★★★★★
(29469 ratings)
A multivitamin with magnesium and lycopene, providing comprehensive nutrient support at an excellent price point (reused for comprehensive coverage).
Other sellers (1)
90 Performance

Chelated Magnesium 133 mg

Swanson
4.8
★★★★★
(10236 ratings)
Contains TRAACS Magnesium Bisglycinate Chelate, a superior and highly absorbable magnesium form, ideal for those seeking maximum efficacy (reused for comprehensive coverage).
Other sellers (0)
85 Performance

Vegan Cal Mag Plus

DEVA
4.7
★★★★★
(899 ratings)
A premium blend of chelated magnesium with calcium and vitamins D2/K, offering comprehensive mineral support (reused for comprehensive coverage).
Other sellers (4)
82 Performance

Magnesium Citrate Pure Powder

Best Naturals
4.4
★★★★★
(126 ratings)
Offers magnesium citrate, a highly bioavailable form, in a versatile powder format, ideal for custom dosing and absorption (reused for comprehensive coverage).
Other sellers (0)
flagReport alternatives

SuppHelper

Compare supplements smarter. Science-backed, user-rated, updated daily.

Explore

  • Compare Supplements
  • Health Goals
  • Stacks

Legal

  • Privacy Policy
  • Terms of Use
  • Medical Disclaimer

Stay in the Loop

Medical disclaimer: Information on SuppHelper is for educational purposes only and is not medical advice. Statements on this site about dietary supplements have not been evaluated by the Food and Drug Administration. Dietary supplements are not intended to diagnose, treat, cure, or prevent any disease. Always consult a qualified healthcare professional before using supplements. Read full disclaimer

© 2025 SuppHelper. All rights reserved.