Harbor & Pine Magnesium Glycinate (Buffered) 240 mg
Harbor & Pine · Demo
- Primary ingredient
- Magnesium Glycinate
- Per serving
- 240 mg elemental magnesium
- Servings
- 90
- Format
- Capsules
- Price
- $19.49*
- Per serving cost
- $0.22
Not verified
MagnesiumCapsulesManufacturer claim onlyDemo
Northfield Labs Magnesium L-Threonate
by Northfield Labs · 144 mg elemental magnesium per serving · 30 servings
Summary
A premium-priced L-threonate product: three capsules provide 144 mg elemental magnesium, which makes its cost per 100 mg many times higher than other forms.
Price per serving (demo)
$1.50
$1.04 per 100 mg elemental magnesium
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Supplement Facts
Supplement Facts
Serving size: 3 capsules
Servings per container: 30
Servings per container: 30
| Amount per serving | Amount | % DV |
|---|---|---|
| Magnesium (as magnesium L-threonate) | 144 mg | 34% |
† Daily Value not established.
Other ingredients: Hypromellose (vegetable capsule), Magnesium stearate.
From product label Transcribed from the product label (fictional demonstration label). Last updated September 28, 2026.
Label details
- Brand
- Northfield LabsFictional demonstration brand
- Primary ingredient
- Magnesium
- Ingredient form
- Magnesium L-Threonate
- Format
- Capsules
- Serving size
- 3 capsules
- Servings per container
- 30
- Amount per serving
- 144 mg elemental magnesium
- Vegan
- YesManufacturer stated
- Manufacturer
- Northfield Labs (fictional)Location: Not verified
Certifications & testing
No certification verifiedSuppScout hasn’t confirmed this product in any certifier’s public listing.
Manufacturer claims
- “Lab tested” — no details provided Claim
A manufacturer claim is what the brand says. A certification is shown as verified only after SuppScout confirms the product in the certifier’s public listing. What “third-party tested” means.
Factual indicators
SuppScout indicators
- Ingredient transparency
From product label - All active amounts disclosed
- Testing information
Manufacturer claim - Manufacturer claim only
- Price per serving
SuppScout calculation - $1.50Based on demonstration price
- Label completeness
SuppScout calculation - 7 of 7 fields
- Independently verified certifications
Third-party certification - None verified
- Number of ingredients
From product label - 1 active · 2 other
SuppScout does not assign a single health score. These are factual indicators drawn from the label and our calculations; they don't tell you whether a supplement is appropriate for you.
What stands out on the label
Pros
- Form clearly stated
Considerations
- Highest cost per 100 mg elemental in this catalog
- Three capsules per serving for 144 mg
- Form-specific human research is limited
Label-based observations, not a judgment of whether the product is right for you.
Who might consider researching this product
- People curious why L-threonate costs more
Compare against similar products
Harbor & Pine Magnesium Citrate 150 mg
Harbor & Pine · Demo
- Primary ingredient
- Magnesium Citrate
- Per serving
- 150 mg elemental magnesium
- Servings
- 60
- Format
- Capsules
- Price
- $14.99*
- Per serving cost
- $0.25
Not verified
Harbor & Pine Magnesium Oxide 250 mg
Harbor & Pine · Demo
- Primary ingredient
- Magnesium Oxide
- Per serving
- 250 mg elemental magnesium
- Servings
- 100
- Format
- Tablets
- Price
- $8.99*
- Per serving cost
- $0.09
Not verified
Northfield Labs Magnesium Glycinate 200 mg
Northfield Labs · Demo
- Primary ingredient
- Magnesium Glycinate
- Per serving
- 200 mg elemental magnesium
- Servings
- 60
- Format
- Capsules
- Price
- $24.99*
- Per serving cost
- $0.42
Manufacturer claim only
References
- Magnesium: Fact Sheet for Health Professionals. NIH Office of Dietary Supplements. ods.od.nih.govGovernment
- Magnesium: Fact Sheet for Consumers. NIH Office of Dietary Supplements. ods.od.nih.govGovernment
- Mah J, Pitre T (2021). Oral magnesium supplementation for insomnia in older adults: a Systematic Review & Meta-Analysis. BMC Complementary Medicine and Therapies 21:125. pubmed.ncbi.nlm.nih.govMeta-analysis
SuppScout links to primary and authoritative sources wherever possible. See our editorial policy for how sources are selected and how corrections are handled.
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This page is educational and is not medical advice. Talk to a healthcare professional before starting a supplement, especially if you have a medical condition, take medications, or are pregnant or breastfeeding.