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Schuessler Tissue Salts Kali Phos

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Price $15.63 Save 6% RRP $16.61

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Price $15.63 Save 6% RRP $16.61

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Kali Phos

What is Kali Phos traditionally used for?

Tradition links Kali Phos with nervous tension, study and restless sleep. It's tissue salt No. 6, potassium phosphate made up at 6X, one of the twelve Schuessler tissue salts.

Christina Hanley, BHSc (Nutritional Medicine), Digital Experience & Content Manager, Mr Vitamins

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?

People who ask about Kali Phos are often stressed, tired or not sleeping, so these are the questions our naturopaths ask in store before you buy it.

A good fit if

  • You follow the tissue salt tradition and No. 6 is the salt you're after
  • You understand it's traditional use, and that the one trial of it found no effect
  • You want something very low risk alongside the basics of sleep, food and rest

Check with us first if

  • You're pregnant or breastfeeding. There's no specific evidence either way.
  • It's for a child. There's no safety data for tissue salts in children.
  • You're avoiding lactose, which is the usual tablet base, or you're managing your blood glucose or tooth decay, because some tablets use sucrose.
  • You take prescription medicine. No interaction with a 6X tissue salt has been found, but it's worth checking.

How the forms compare

  • Kali Phos 6X tablets. Best known for: The standard retail form, at the potency Schüssler used. Absorption: Not applicable; there's no nutritional dose of potassium to absorb. Typical use: Let it dissolve on your tongue, following the pack directions.
  • Spray or liquid tissue salts. Best known for: A water, ethanol or glycerol base instead of a lactose tablet. Absorption: Not applicable at 6X. Typical use: If you're avoiding lactose and a Kali Phos liquid is available.
  • Combination tissue salt formulas. Best known for: Several salts in one tablet, sold for a named concern. Absorption: Not applicable at 6X. Typical use: Whatever that product's own AUST L indication says.
  • Higher potencies (12X, 30C and similar). Best known for: More dilution steps than the 6X Schüssler used. Absorption: Not applicable. Typical use: Individual homoeopathic prescribing, outside the tissue salt system.

Common questions

Does Kali Phos work for stress and study?

It's the tissue salt that tradition links with nerves and mental tiredness, and it's the only one that's been tested at the 6X strength sold. A triple-blind trial in 86 people found no effect on mental tiredness compared with placebo. The authors noted their test may have missed a small effect, and it used a single dose. So we describe it as traditional use, not as proven.

Can Kali Phos help me sleep?

Tradition uses Kali Phos for restless sleep, but no trial shows it helps. A European clinical guideline doesn't recommend homeopathy for long-term insomnia, and recommends cognitive behavioural therapy as the first treatment for adults. If your sleep has been off for weeks, it's worth raising with your doctor before you reach for a tablet.

Is Kali Phos a potassium supplement?

No. It's potassium phosphate prepared at 6X, the sixth step of a one-in-ten dilution, which leaves no meaningful amount of the mineral in the tablet. Potassium itself comes from food. The required kidney and blood pressure medicine warning you may have seen on a tissue salt belongs to Kali Mur, which is potassium chloride, not Kali Phos.

How much, and when

Reference values. The potassium figures don't apply to this product. For context, the NHMRC sets an Adequate Intake for potassium of 3,800 mg a day for adult men and 2,800 mg a day for adult women. A 6X tablet adds nothing meaningful towards either.

Typical supplemental range. Schüssler's own approach, which Australian packs still follow, was the sixth decimal dilution. In his words: "In my practice I generally use the 6th decimal trituration." Directions vary by brand, so follow the label on the pack you're holding.

Upper level. Australia's permitted ingredients list (Schedule 1) has no daily cap on potassium phosphate in homoeopathic use. For potassium as a nutrient, the NHMRC notes that "No ULs have been set for potassium from dietary sources." Neither figure is relevant to a 6X tablet.

Worth knowing. If you're worried about how you're coping, sleeping or concentrating, it's worth talking it through rather than just picking something off the shelf. What you need depends on your age, diet and health, so talk to one of our naturopaths.

Food sources

The register deliberately doesn't pair tissue salts with food, because doing so implies the tablet supplies the nutrient. The potassium and phosphate your body actually uses come from food and, where needed, from a nutritional supplement, not from Kali Phos.

Before you start

If any of these sound like you, talk to one of our naturopaths or your doctor before you start.

  • Ongoing sleep, stress or concentration problems. The main risk is delaying care that works.
  • Pregnancy and breastfeeding. We found no specific evidence.
  • Children. There's no safety data for tissue salts in children.
  • If you're avoiding lactose. Homoeopathic tablets are made by repeatedly grinding the ingredient into lactose.
  • If you're managing blood glucose or tooth decay. Some homoeopathic tablets contain sucrose, which is a permitted excipient.
  • If you take prescription medicines, check with your doctor, pharmacist or our naturopaths before you start.

The evidence, and its limits

  • Nerves and mental tiredness are what tradition uses Kali Phos for; reviews find no homeopathic remedy convincingly beats placebo. (DOI record)
  • Kali Phos was Schüssler's salt for nerves and exhaustion of mind and body; that's traditional use only. (Internet Archive / US National Library of Medicine digitised)
  • A triple-blind trial of Kali Phos 6x in 86 people found no effect on mental fatigue (effect size -0.17). (DOI record)
  • Dibasic potassium phosphate (Schedule 1 item 1778) is allowed for active, excipient and homoeopathic use in listed medicines. (Schedule 1, item 1778)
  • In 41 homeopathy trials, side effects were no more common than in the comparison groups (OR 0.99, 95% CI 0.86 to 1.14). (DOI record)

How it works

In Schüssler's system, each tissue salt matched a mineral he believed the body's cells were short of, and Kali Phos was his salt for nerves and mental exhaustion. That's the tradition, not a research finding. It's also the one tissue salt that's actually been tested at the strength sold: a triple-blind trial of Kali Phos 6X in 86 people found no effect on mental tiredness. Think of the name as its place in the system rather than a description of what's inside. A 6X tablet is the sixth step of a one-in-ten dilution by grinding, so there's no meaningful amount of potassium phosphate left in it nutritionally.

The Australian rules

Dibasic potassium phosphate is item 1778 on Australia's permitted ingredients list (Schedule 1). It's allowed for active, excipient and homoeopathic use. Its conditions are about pH, and about potassium being a required component when it's sold as a mineral supplement. Monobasic (item 3398) and tribasic potassium phosphate (item 4997) are allowed for the same three purposes. None of them carries a warning statement. The potassium chloride warning about kidney disease belongs to Kali Mur, not Kali Phos. On claims, the permitted indications include nervous system, nervous tension, sleep and stress wordings that may rest on traditional evidence. "Helps enhance/promote healthy nerve conduction/transmission/neurotransmission" needs scientific evidence, which a 6X tablet doesn't have, so we don't use it. Being allowed isn't the government endorsing a product, and it says nothing about whether the product works.

Read the instrument: Schedule 1, item 1778.

Not sure this is the right form for you? Ask one of our naturopaths. It is free and takes 10 minutes.

Kali 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.

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