NOW Foods Magnesium Oxide 8 oz.

NOW® Magnesium Oxide Pure Powder is about as simple as a magnesium supplement gets: a single-ingredient powder with nothing added, delivering 290 mg of elemental magnesium from 500 mg of magnesium oxide in a small 1/4-teaspoon serving. Magnesium is a required cofactor for an estimated 300 enzymes, driving reactions that include energy production and metabolism, protein and fatty-acid synthesis, and glucose metabolism.* It is also essential for muscle contraction, nerve-impulse transmission and healthy bone mineralization, and it helps regulate the body's calcium balance through its effect on the parathyroid gland.* A powder lets you scale your serving precisely and mix magnesium into water or a clear beverage — just remember it must be dissolved into cold liquid before drinking. It is an economical, no-frills way to supplement this essential mineral.*

About the key ingredients

• Magnesium (elemental, from Magnesium Oxide) – 290 mg per 1/4 tsp: A concentrated, single-ingredient source of magnesium oxide that delivers a high amount of elemental magnesium per small serving, with no fillers, flavors or additives of any kind.* Learn more about Magnesium from the NIH.
• Other ingredients: NOW® uses simple, functional excipients — typically a plant-based hypromellose (cellulose) capsule or a light tablet coating plus flow agents such as stearic acid and silicon dioxide — with no unnecessary fillers, artificial colors or preservatives.

Who it's for

This is a straightforward daily magnesium option for adults who want to top up an essential mineral that is easy to fall short on — especially active people, those who sweat a lot, older adults, and anyone whose diet is light on leafy greens, nuts, seeds and whole grains.* It suits people looking to support relaxed muscles, steady energy and a calm, healthy nervous system as part of their everyday routine.* Because NOW® offers magnesium in several forms and strengths, you can match the format to your preference, whether you like capsules, tablets, softgels or a mixable powder.

Suggested use

Mix 1/4 level teaspoon of powder into at least 6 oz. of cold water or clear liquid. Take once daily with a meal. Pure Magnesium Oxide Powder can increase the temperature of liquids upon contact; therefore, the recommended serving MUST be mixed into at least 6 oz. of cold liquid to neutralize this reaction prior to ingestion. Store in a cool, dry place after opening.

Quality & certifications

• Family Owned Since 1968
• GMP Quality Assured
• Keto-Friendly
• Non-GMO Project Verified
• Kosher
• Vegan

Frequently asked questions

What makes magnesium oxide a good choice?
As a pure powder it contains only magnesium oxide — no capsules, coatings or excipients — giving you a flexible, economical way to add magnesium to water or juice.*

What does magnesium actually do in the body?
Magnesium is one of the most widely used minerals in human physiology. It acts as a cofactor for roughly 300 enzymes involved in producing cellular energy, building protein, and metabolizing carbohydrates and fats, and it supports normal muscle, nerve, heart and bone function.* Many modern diets fall short of the recommended intake.

When and how should I take it?
Most people take magnesium daily with food, and some prefer an evening dose as part of a wind-down routine. Follow the serving size on the label or the guidance of your healthcare provider, and if you are new to magnesium, starting with a lower amount lets your digestive system adjust.

Is this product vegetarian and free of common allergens?
NOW® magnesium products are made without wheat, gluten, soy, milk, egg, fish and shellfish ingredients, and most use a plant-based vegetarian capsule or coating. Check the Supplement Facts panel for the exact form and any product-specific certifications such as Kosher, Vegan or Non-GMO.

Cautions & interactions

Magnesium is generally well tolerated, but larger doses can have a natural laxative effect, so it is wise to start low and take it with food. Talk to your doctor before combining magnesium with prescription medicines, because it can reduce the absorption of certain antibiotics (such as tetracyclines and quinolones) and bisphosphonates — separate these by a few hours — and it may add to the effect of some blood-pressure or diuretic medications. If you have reduced kidney function, use magnesium only under medical supervision, since the kidneys clear excess magnesium. Keep out of reach of children and consult your physician if pregnant, nursing or managing a medical condition.

Allergen information: Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish or tree nut ingredients. Produced in a GMP facility that processes other ingredients containing these allergens.

Caution: This product must be dissolved into at least 6 oz. of cold water or clear liquid before consuming. Do not breathe powder and avoid contact with skin, eyes, and clothing. For adults only. Consult physician if pregnant/nursing, taking medication, or have a medical condition. Keep out of reach of children.

*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.