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Description
Schuessler Tissue Salts Mag Phos (No. 8) Oral Spray is a convenient lactose-free spray delivering the Mag Phos tissue salt. Mag Phos is traditionally known as the muscle relaxant tissue salt.
Product Strengths
- Mag Phos (No. 8) tissue salt in a convenient oral spray
- Lactose-free format
- Easy to use on the go
- 30ml spray
Ingredients
Each spray contains Magnesium phosphate (Mag Phos) 6X. Contains ethanol.
Allergens
Always review label for full list of ingredients.
Suggested Use
Adults: 4 sprays. Children: 2 sprays. Infants: 1 spray. For acute conditions: every half hour (up to 6 doses per day) until symptoms subside. For chronic or maintenance use: 4 times daily, ideally half an hour before meals, with the last dose at bedtime, or as professionally prescribed. Confirm directions from product label
Storage
Store below 30°C in a cool, dry place away from direct sunlight.
Always read the label and follow the directions for use. If symptoms persist, talk to your health professional.
ingredients
Contains Magnesium phosphate 6X
suggested dose
Adults: 4 sprays
Children: 2 sprays
Infants: 1 spray
Acute conditions: every half an hour (up to 6 doses per day) until symptoms subside.
Chronic or maintenance dose: 4 times daily.
Take half an hour before meals, last dose at bedtime, or as professionally prescribed.
Precautions
Always read the label and use only as directed. If symptoms persist consult your healthcare practitioner.
Mag Phos
What is Mag Phos traditionally used for?
Mag Phos is traditionally used for calf cramps and mild nerve pain. It's tissue salt No. 8, magnesium phosphate made up at 6X, one of the twelve Schuessler tissue salts, and it also comes as a lactose-free spray.

Christina HanleyBHSc (Nutritional Medicine), Digital Experience & Content Manager
Checked this page October 2026
See what we checked
Is this the right tissue salts for you?
How the forms compare
Common questions
Is Mag Phos a magnesium supplement?
No. It's magnesium phosphate prepared at 6X, diluted one in ten six times over, which leaves no meaningful amount of the mineral in the tablet. That's not a magnesium dose. If you're worried about your magnesium intake, a magnesium supplement gives you milligrams you can count, and it's the one the nutrient research is about.
Can I take Mag Phos instead of magnesium for cramps?
They're different products. Mag Phos is the tissue salt tradition's choice for cramp, but no trial has tested it. And real magnesium hasn't done much better: a Cochrane review found oral magnesium changed cramps with no known cause by just 0.18 a week, with a confidence interval from 0.84 fewer to 0.49 more. If your cramps keep coming back, talk to your doctor.
Can I give Mag Phos to my teething baby?
Not by mouth if your baby is under 12 months. Australia's ingredient rules say an oral magnesium phosphate medicine must not be directed for use in babies that young, and that includes tissue salts. For an older child, check with us first, because there's no safety data on tissue salts for children. A pharmacist or your child health nurse can help with teething.
How much, and when
Food sources
Before you start
The evidence, and its limits
How it works
The Australian rules
Not sure this is the right form for you? Ask one of our naturopaths. It is free and takes 10 minutes.
Mag Phos is one form of Tissue Salts. Always read the label and follow the directions for use. General information only, and not a substitute for advice from your doctor or one of our naturopaths.