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Magnesium glycinate side effects: what to check on the label

Possible side effects depend on the ingredients, dose, allergies, medical context, and total intake from other products.

Medium safety attention Moderate evidence Price: $0.47
Educational onlyChecked 2026-07-23Label check neededLabels can changeLabel details

Quick answer

For Magnesium Bisglycinate, check the ingredient list, allergen statement, dose per serving, medication cautions, and any condition-specific warnings. Side effects can vary by person and by product format.

Check these first

Ingredient risks: Magnesium glycinate · Form and serving: Powder, 1 scoop · Price context: $0.47 per serving estimate at last check; retailer prices can change.

Label check

Side effect checklist

  • Active ingredients: confirm Magnesium glycinate and the amount per serving rather than relying on the front label.
  • Serving context: compare Powder and 1 scoop with how often the label says to use it.
  • Allergens and inactive ingredients: check flavors, sweeteners, capsules, gelatin, oils, dairy, soy, gluten, fish, or shellfish when they matter to you.
  • Overlap: count similar ingredients from multivitamins, powders, blends, gummies, drinks, and topical products before adding another product.
  • Check elemental magnesium amount, loose-stool risk, kidney disease context, and spacing from thyroid medicine, some antibiotics, and bone medicines.
  • Count magnesium from multivitamins, sleep blends, laxative-style products, and powders before adding another source.

Before using

Most likely label issues

Label cautionsCheck total magnesium intake and kidney-related cautions. Medication: Magnesium may need to be separated from certain antibiotics, thyroid medication, or bisphosphonates if advised. High-dose context: Avoid stacking multiple magnesium products without checking total elemental magnesium intake.
Allergy checkCheck the allergen statement and inactive ingredients, especially if you avoid dairy, soy, fish, shellfish, gluten, gelatin, or sweeteners.
Medication contextMagnesium may need to be separated from certain antibiotics, thyroid medication, or bisphosphonates if advised.
Condition contextKidney disease or impaired kidney function requires professional guidance before magnesium use. Pregnancy/Breastfeeding: Ask a healthcare professional before using supplemental magnesium during pregnancy or breastfeeding.

Safety signals

When to stop and get help

  • Get urgent help for trouble breathing, facial or throat swelling, severe hives, fainting, chest pain, or a severe allergic reaction.
  • Stop using the product and contact a clinician if you notice a severe rash, persistent vomiting, severe diarrhea, black or bloody stool, yellowing skin, or unusual weakness.
  • For topical products, stop and seek help if scalp or skin irritation becomes severe, spreads, blisters, or involves the eyes.
  • For children, pregnancy, breastfeeding, major medical conditions, or multiple medications, use clinician guidance before relying on a supplement label alone.

This page is educational and does not replace care from a qualified clinician.

Product context

Why side effects can differ

Magnesium Bisglycinate is a Magnesium product from Thorne. Side effects can depend on dose, form, inactive ingredients, allergies, medication use, health conditions, and whether you use similar products at the same time.

Price context: $0.47 per serving estimate at last check; retailer prices can change.

Ingredients and goals

Follow the ingredient, then the goal

Connected ingredients: Magnesium glycinate. Connected goals: Sleep, Stress, Muscle.

Safety notes

Known cautions from the product record

  • Check total magnesium intake and kidney-related cautions.
  • Medication: Magnesium may need to be separated from certain antibiotics, thyroid medication, or bisphosphonates if advised.
  • Condition: Kidney disease or impaired kidney function requires professional guidance before magnesium use.
  • Possible side effect: Loose stools, cramping, or digestive discomfort may occur, especially with citrate or higher doses.
  • Dose: Avoid stacking multiple magnesium products without checking total elemental magnesium intake.
  • Pregnancy/Breastfeeding: Ask a healthcare professional before using supplemental magnesium during pregnancy or breastfeeding.
  • Ingredient context: Check kidney disease, medications, and total magnesium intake.

Label Check

Last checked
2026-07-23
Next check
2026-08-22
Source
Product label snapshot
Label confidence
Label check needed

Shown fields

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Can change

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