Good Magnesium 200 mg – Muscle and Nerve Support | 60 Vegetarian Capsules
Good Magnesium is a magnesium supplement with 200 mg of magnesium as rice protein chelate in every vegetarian capsule, 47% of the Daily Value. The other ingredients include parsley leaf, holy basil and ginger root. Each bottle holds 60 vegetarian capsules, and one capsule is a serving. It supports normal muscle function, nervous system function and relaxation.†
Good Magnesium is for adults who want a simple, one-capsule way to top up a mineral a lot of us run short on. The NIH Office of Dietary Supplements notes that many people in the United States get less magnesium from food than recommended (the NIH magnesium fact sheet). If you train hard, sit through long and stressful workdays, or are building a better bedtime routine, magnesium is one of the basics worth getting right.
Aging isn't optional. Getting old is. The habits that keep you moving well in your 70s and 80s start in your 30s and 40s, and most of them are boring: sleep, strength, decent food, small nutrient gaps closed. This is one of the boring ones, and we mean that as a compliment.
Why people take Good Magnesium
- Supports normal muscle function, so muscles can contract and relax the way they're built to.†
- Supports normal nervous system function and a healthy response to everyday stress.†
- Supports normal energy production in your cells.†
- Supports relaxation and normal sleep quality as part of an evening routine.†
- Helps close a common nutrient gap with 200 mg, or 47% of the Daily Value, in one capsule.†
What's in each serving
| Ingredient | Amount per serving | % Daily Value |
|---|---|---|
| Magnesium (rice protein chelate) | 200 mg | 47% |
Serving size: 1 Vegetarian Capsule. Each bottle holds 60 vegetarian capsules, which is 60 servings at the label's one-capsule serving. Other ingredients: Vegetable cellulose (preservative-free, from capsule shell), L-leucine, organic rice concentrate, parsley leaf (Petroselinum crispun), holy basil herb (Ocimum sanctum), and ginger root (Zingiber officinale). The label states: "NO corn, soy, salt, yeast, gluten, milk & egg products, sugar, starch, or preservatives."
How Good Magnesium works
Magnesium: 200 mg per capsule
Magnesium is a cofactor in more than 300 enzyme systems, the reactions behind building protein, muscle and nerve function, and energy production (NIH Office of Dietary Supplements).† Less than 1% of the magnesium in your body is in your blood serum, and a standard serum test doesn't necessarily reflect how much your body holds overall (a review of magnesium basics).
Adults need 400 to 420 mg a day (men) or 310 to 320 mg (women who aren't pregnant) from all sources, depending on age. One capsule gives you 200 mg, 47% of the Daily Value. It's built to top up a decent diet, not replace one.
The rice protein chelate
The label lists the magnesium as rice protein chelate. A chelate (say "KEE-late") is a mineral bound to amino acids, here amino acids from rice protein. Researchers group amino acid chelates and citrate with the organic forms of magnesium, and magnesium oxide and other simple mineral salts with the inorganic forms.
A systematic review of 14 magnesium bioavailability studies concluded that inorganic forms appear less bioavailable than organic ones, and that the share you absorb depends on the dose. It also notes that in healthy people who weren't low to begin with, all the forms studied could maintain normal magnesium levels. In a 60-day randomized, double-blind trial in 46 healthy people taking 300 mg a day, an amino acid chelate and magnesium citrate both showed greater absorption than magnesium oxide (by 24-hour urine magnesium), and oxide was no different from placebo. Citrate produced the highest blood levels. The limits: it was a small study, and it tested an amino acid chelate, not our rice protein chelate specifically.
Muscles and energy
Magnesium takes part in energy metabolism and helps maintain normal muscle function.† A review of magnesium and exercise performance found that the need for magnesium rises with physical activity, and that surveys link better magnesium status with muscle performance such as grip strength and leg power. Some supplement trials suggested gains in measures such as thigh muscle torque, but most human studies tracked heart rate, blood pressure or oxygen use rather than performance itself. Straight talk: that's a long way from extra magnesium turning into a personal record. It supports the normal muscle function you already have.†
Stress and the nervous system
Magnesium helps regulate the signals your nervous system uses during a normal stress response.† A 2020 review of magnesium and stress describes a two-way street: stress may increase the magnesium your body loses, and low magnesium may leave you more sensitive to stress. The idea rests on lab research and on studies that measured magnesium in stressed people, so think of it as a reason to keep your intake steady, not a promise of calm in a capsule.
Relaxation and sleep
In a 2025 randomized, placebo-controlled trial in 155 healthy adults who reported poor sleep, 250 mg of magnesium a day (as bisglycinate, another amino acid chelate) improved sleep questionnaire scores more than placebo after 4 weeks, but the difference was small. Exploratory analyses hinted that people who ate less magnesium improved more. Different form, slightly higher dose, self-reported sleep. So: a modest signal, most likely to matter if your diet runs low.†
Parsley, holy basil, ginger and the rest
Parsley leaf, holy basil herb and ginger root are listed among the other ingredients, and the front of the bottle reads "Magnesium plus Herbs." The label doesn't give their amounts, so we don't make claims for them. L-leucine (an amino acid) and organic rice concentrate are also listed, and the capsule shell is vegetable cellulose.
How to take Good Magnesium
The label says: "One or more capsules daily, as a dietary supplement."
One capsule gives you 200 mg. The NIH lists an adult upper limit of 350 mg a day for magnesium from supplements, because higher supplement doses can cause loose stools, nausea and stomach cramping (magnesium from food doesn't count toward it). Two capsules would be 400 mg, so talk with your practitioner before taking more than one a day, and count the magnesium in your other supplements.
Magnesium can reduce how well your body absorbs some medications, including tetracycline and quinolone antibiotics and oral bisphosphonates, so doses may need to be spaced hours apart. Ask your healthcare practitioner before use if you are pregnant, nursing, taking medication, or have a medical condition.
Don't take our word for it
- Verified by independent labs. ISO 17025-accredited labs check our test results.
- Every ingredient lot tested before use. Federal rules only require an identity test on incoming dietary ingredients. We test every incoming lot, the magnesium chelate included, for identity, potency, heavy metals and microbes.
- If it misses spec, it doesn't go in a bottle. More than 99% of our tests pass, and the lots that don't are turned away.
- A certificate of analysis for every lot. See the certificates of analysis for Good Magnesium.
Made in the USA. Made and tested in Mt. Angel, Oregon. It's a farm town of about 3,500 people in the Willamette Valley, and our UL-certified cGMP facility is right there. Formulators, makers and testers work under one roof, so the people who write the spec, the people who fill the capsules and the people who test the lot share a building. The owners work there too, and have since 2017. We've been making supplements in Oregon since 1974, and we're not getting old either.
Frequently asked questions
How much magnesium is in each capsule?
Each capsule has 200 mg of magnesium as rice protein chelate, 47% of the Daily Value. One capsule is a serving, and a bottle holds 60.
How many capsules should I take a day?
The label says one or more capsules daily, and one capsule is 200 mg. The NIH lists an adult upper limit of 350 mg a day for magnesium from supplements, so check with your practitioner before going to two capsules (400 mg).
When should I take it, and does it need food?
Take it whenever you'll remember it. The label doesn't name a time or mention food. Many people like it in the evening as part of winding down.
How long until I notice a difference?
Many people won't feel a switch flip, because magnesium works in the background of normal muscle and nerve function.† In the sleep trial above, the small difference was measured after 4 weeks of daily use, so give it about a month of steady use before you judge.
Can I take Good Magnesium with other Mt. Angel Vitamins products?
Yes, but add up the magnesium first. Calming Mag Powder and Sleepy Sleep both contain magnesium too, and the 350 mg upper limit covers all your supplements combined. If your total goes past it, run the plan by your practitioner.
What does "rice protein chelate" mean?
It's how the label names the magnesium source: magnesium bound to amino acids from rice protein. Chelates like this are grouped with the organic forms of magnesium, and in human studies organic forms such as amino acid chelates and citrate have generally shown greater absorption than magnesium oxide.
Is it safe to take with my medication?
Ask your healthcare practitioner or pharmacist first. Magnesium can lower how well you absorb some antibiotics and bone medications, so doses may need spacing.
Keep learning
- How six magnesium products for sleep compare on dose, form, testing and price
- Calming Mag Powder, magnesium you mix into a drink
- The Calm + Sleep Stack: Sleepy Sleep, Relaxing Passion Flower and 5-HTP
References
- Jahnen-Dechent W et al. Magnesium basics. Clin Kidney J. 2012. PubMed
- Pardo MR et al. Bioavailability of magnesium food supplements: A systematic review. Nutrition. 2021. PubMed
- Walker AF et al. Mg citrate found more bioavailable than other Mg preparations in a randomised, double-blind study. Magnes Res. 2003. PubMed
- Zhang Y et al. Can Magnesium Enhance Exercise Performance? Nutrients. 2017. PubMed
- Pickering G et al. Magnesium Status and Stress: The Vicious Circle Concept Revisited. Nutrients. 2020. PubMed
- Schuster J et al. Magnesium Bisglycinate Supplementation in Healthy Adults Reporting Poor Sleep: A Randomized, Placebo-Controlled Trial. Nat Sci Sleep. 2025. PubMed
†These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
