











Magnesium w/SRT®
- Relieves stiff muscles*
- Boosts energy and mood*
- The only time-release magnesium with a peer-reviewed clinical trial.
Supplement Facts

Supplement Facts
-
Vitamin B6 (as Pyridoxal 5-Phosphate) 5mg 294% daily value
-
Folate (as Quatrefolic® 5-Methyl Tetrahydrofolic Acid Glucosamine Salt) 200 mcg 50% daily value
-
-
Vitamin B12 (as MecobalActive® Methylcobalamin) 6 mcg 250% daily value
-
Magnesium (as Dimagnesium Malate) 500 mg 119% daily value
-
Malic Acid (as Dimagnesium Malate) 1,436 mg † daily value
††The % Daily Value (DV) is based on a 2,000 calorie diet.
†Daily Value not established.
**DFE (Dietary Folate Equivalent) is the total amount of folate per serving.
Other ingredients: Microcrystalline Cellulose, Hydroxypropyl Cellulose, Croscarmellose Sodium & Hydroxypropyl Methylcellulose (Plantbased insoluble fibers used to achieve Sustained Release Technology*); L-Leucine (Essential amino acid used as lubricant), Silicon Dioxide (Anti-caking agent), Clear Coating (Hydroxypropyl Methylcellulose and Sunflower oil) and Micro Wax (for easier swallowing).
Made with love by: Jigsaw Health, LLC. 9035 E Pima Center Pkwy, Suite 4, Scottsdale, AZ 85258
Suggested use: As a nutritional supplement, take 4 tablets per day with food. Divide doses if desired, or use as directed by your healthcare professional.

Supplement Facts
-
Magnesium (as Dimagnesium Malate) 500 mg 119% daily value
-
Malic Acid (as Dimagnesium Malate) 1436 mg † 50% daily value
-
††The % Daily Value (DV) is based on a 2,000 calorie diet.
† Daily Value not established
Other Ingredients: Microcrystalline Cellulose & Hydroxypropyl Cellulose (plant-based insoluble fibers used to achieve SRT); L-Leucine (essential amino acid used as lubricant), Croscarmellose Sodium (plant-based insoluble fiber used to achieve SRT), Silicon Dioxide (anti-caking agent), Clear Coating (hydroxypropylmethylcellulose and sunflower oil) and Micro Wax (for easier swallowing).
Suggested Use: As a nutritional supplement, take 4 tablets per day with food. Divide doses if desired, or use as directed by your healthcare professional.
Should not be used if tamper-evident seal is broken. Keep out of reach of children. Store in a cool, dry place.

Science & 3rd-Party Testing
Clinically Tested
We put MagSRT® to the test in the Scottsdale Magnesium Study, a placebo-controlled clinical trial published in the Journal of the American College of Nutrition. The results? Participants taking MagSRT® experienced a 22% increase in serum Magnesium, while a group continuing supplementation for 90 days saw a 30% increase in red blood cell Magnesium and a 63% reduction in Magnesium deficiency symptom scores. These findings support the effectiveness of our sustained-release Magnesium technology.*
3rd-Party Testing
At Jigsaw Health, quality and safety come first. Every batch of our supplements goes through a rigorous three-step testing process to verify identity, purity, and potency. We manufacture in FDA-registered, cGMP-compliant facilities and conduct independent 3rd-party laboratory testing to validate that our products meet label claims. We also publish our 3rd-party test results on our website, because you deserve to know exactly what's in your supplements.
Certifications
Manufactured in GMP and FDA registered facilities in the U.S., and thoroughly tested for heavy metals and contaminants.
How to Use
As a nutritional supplement, take 4 tablets per day with food. Divide doses if desired, or use as directed by your healthcare professional.
Why Jigsaw?
Feeling good is the point. The details make the difference.
Purposefully formulated. From nutrient forms to delivery methods, we obsess over the details that make a supplement worth taking.
Science in every formula. Our formulas are backed by science and built with purpose. We choose ingredients for their quality and effectiveness... never cheap, ineffective forms just to cut costs.
Quality beyond the label. 3rd-party testing and a dedicated quality team help ensure what goes into your supplements meets our standards.
Real people. Real help. Questions about a product or your order? Our Customer Happiness Team is here for you. Connect with a real person who cares, and skip the frustration.
Call a human: 888-352-5050 · Live chat · Email us: help@jigsawhealth.com


Why MagSRT®
Why MagSRT® over any other magnesium
8 hours of absorption
Our Proprietary Sustained Release Technology (SRT) spreads the release of magnesium out over 8 hours, allowing your body to actually absorb it while avoiding GI upset.*
The only one with a clinical trial
MagSRT is the only time-release magnesium supplement with a peer-reviewed clinical trial published in the Journal of the American College of Nutrition.
Highly absorbable form
Utilizes Albion® Dimagnesium Malate to deliver 500mg of elemental magnesium. We never use the cheap forms of magnesium that are poorly absorbed.*
Family-owned since 2005
Founded by Pat Sullivan Sr. and Patrick Sullivan Jr. in April 2005. Still family-run, still triple-testing every batch, still real people answering the phone.
Clinical evidence
We ran the study. Then we published it.
MagSRT® by Jigsaw Health was evaluated in the Scottsdale Magnesium Study (SMS), a human clinical trial of 91 participants.The study measured blood serum magnesium levels, red blood cell magnesium levels, and magnesium deficiency symptoms:
+22%
in blood serum magnesium levels.*
+30%
in red blood cell levels.*
-63%
in magnesium deficiency symptoms.*
Most supplement companies cite someone else’s research. We funded our own. The Scottsdale Magnesium Study was a placebo-controlled human clinical trial of 91 participants that measured serum magnesium, red blood cell (RBC) magnesium, and magnesium deficiency symptoms, and it was published in the peer-reviewed Journal of the American College of Nutrition. RBC magnesium matters here because it reflects what actually made it into your cells, not just what’s floating in your bloodstream.
Published in the Journal of the American College of Nutrition
Compare
How MagSRT® stacks up
| MagSRT® | SLOW-MAG® | MAG-TAB® SR | |
|---|---|---|---|
| Magnesium per serving | 500 mg | 143 mg | 168 mg |
| Cost per 500mg daily | $0.83 | $2.08 | $2.04 |
| Magnesium form | Dimagnesium Malate (Albion®) | Chloride | L-lactate dihydrate |
| B-vitamin cofactors | YesB-FREE option | No | No |
| Peer-reviewed clinical trial | Yes | No | No |
| 3rd-party verified | Yes | No | No |
| Time-released | Yes8 hours | NoPartial | Yes |
| Doses to reach 500mg | 4 tablets | ~11 tablets | ~9 caplets |
| 90-day money-back guarantee | Yes | No | No |
Competitor figures checked against current labels before launch, then quarterly.
As featured in
- Journal of the American College of Nutrition

- Food Business Review — 2026 Nutritional Supplement Company of the Year



- Best of Scottsdale 2022
Support
Frequently Asked Questions
Usage
How long until I notice something?
Most people notice nothing dramatic in the first few days, and that’s normal. Week 1–2 is where many of our customers first notice a change: falling asleep more easily, waking less.*
Morning or night?
Either is fine. Most customers take 2 in the morning and 2 in the afternoon.
Science
What does “SRT” mean?
MagSRT uses a Proprietary Sustained Release Technology that releases magnesium over roughly eight hours instead of dumping it into your gut at once, making it easier for your body to absorb.*
Why malic acid?
Magnesium and malic acid are both used in cellular energy production. MagSRT® uses dimagnesium malate from Albion®, which pairs the two.*
Why is Vitamin B12 (Methylcobalamin) included?
Methylcobalamin, the active form of Vitamin B12, is included as a supporting B vitamin to contribute to the effectiveness of Magnesium.*
Additionally, methylcobalamin is a necessary cofactor for your body's ability to properly methylate. Methylation is a cycle that occurs in your body billions of times every second. It's one of the most important biochemical processes for long-term health and essential for the proper function of almost all of your body's systems.*
Using the active form of B12 is particularly important because people with chronic conditions are poor methylators -- making it difficult to convert inactive forms into their useful active form.*
What is Quatrefolic® (Folate, Vitamin B9), and why is it included?
Quatrefolic® (5-MTHF, or folate) is an active form of Vitamin B-9, folic acid. For many people, it is difficult for the liver to convert folic acid into folate and can lead to a deficiency.
Folate is an important cofactor to Pyridoxal-5-Phosphate (P5P, Vitamin B6) and beneficial to many bodily functions. Together, these greatly improve Magnesium’s function to support optimal health.*
Why is Vitamin B6 (Pyridoxal-5-Phosphate) included?
P5P (Pyridoxal-5-Phosphate), the active form of Vitamin B6, performs over 30 critical enzymatic reactions in the body, including the manufacture of serotonin and dopamine in the brain. The inactive forms of B6 (pyridoxine hydro-chloride, pyridoxal, or pyridoxamine) have to be converted by the liver to the active form (Pyridoxal-5-Phosphate or P5P) the body needs. Individuals with compromised liver function have difficulty making this conversion and consequently may be at risk of a vitamin B6 deficiency.
P5P works synergistically with Magnesium in many ways. A deficiency in either causes many issues where the body depends on both Magnesium and P5P. It is critical to get both.
Since Vitamin B6 is already difficult to get and convert into its usable form, we give it to you already in its active P5P form. All the benefits are available immediately after absorption - no trouble converting or waiting.
PLEASE NOTE: This product does NOT contain Pyridoxamine.
Safety
Will this cause GI upset like other magnesium supplements?
Instead of the magnesium being dumped into your system all at once, SRT slows down the release of magnesium so it's spread out over 8 hours, which allows your body to absorb the maximum it needs to start feeling your best... avoiding the dreaded digestive discomfort that high doses that most high potency magnesium supplements can cause.*
How do I know what’s in the bottle is what’s on the label?
Every batch of our products is triple-tested, and the lab results are posted online for all to see. We believe that what’s on the label is what should be in the bottle, and nothing else.
Orders & Shipping
What is your return policy?
Every order is covered by our 90-Day Money-Back Guarantee. Reach out to our Customer Happiness Team: 888-352-5050, Live chat, or Email us at help@jigsawhealth.com
How fast will my order ship?
Orders received BEFORE 3pm ET / 12pm PT on business days will be shipped out the same day. Orders received after that time will be shipped the following business day. Business days are Monday - Friday, excluding holidays.
Can I cancel or change my subscription?
Yes, cancel or change anytime.
Recent Reviews
Pairs well with MagSRT®
Complete your routine
Bundle any pairing below and save on both.

















