IP-6
Useful mainly for people with recurrent calcium oxalate kidney stones seeking a non-prescription adjunct.
Quick decision guide
May help most
People with recurrent calcium oxalate kidney stones seeking a non-prescription adjunct
Common dosing range
800–1,600 mg/day on an empty stomach
When to expect effects
Weeks
Watch out for
Chronically reduces absorption of iron, zinc, and calcium — risk of mineral deficiency with sustained high-dose use
What is it
IP-6 (inositol hexaphosphate, phytic acid) is a phosphorylated form of inositol found in seeds, grains, and legumes. As a supplement it is marketed for cancer support, kidney stone prevention, and antioxidant effects.
Is it worth it for you?
Use this as a quick fit check, not a diagnosis.
Worth considering if…
Probably skip if…
Evidence at a glance
| Goal | Effect | Best fit | Time |
|---|---|---|---|
antioxidant / free iron chelation Mixed Evidence | Reduces pro-oxidant free iron in preclinical and in vitro models | Not established in any specific human population | Unknown in clinical context |
antioxidant / free iron chelation
- Effect
- Reduces pro-oxidant free iron in preclinical and in vitro models
- Best fit
- Not established in any specific human population
- Time
- Unknown in clinical context
Evidence for 1 use
AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.
antioxidant / free iron chelation
Mechanism onlyIP-6 chelates polyvalent cations including free iron, which in excess can catalyze oxidative damage via the Fenton reaction. This antioxidant mechanism is demonstrated in cell and animal models. Human biomarker data are sparse and clinical outcomes have not been tested.
Bottom line: A plausible antioxidant mechanism via iron chelation exists, but no human clinical benefit has been demonstrated.
How it works
How to take it
What to track
1 commercial form
Compare the main delivery options and what they’re best suited for.
IP-6 + inositol
Most common branded format on the market.
Combined product; oral absorption is modest.
Safety
Know the common side effects, key cautions, and who should avoid it.
Common side effects
Serious risks
Mineral deficiency (iron, zinc, calcium) with chronic high-dose use in nutritionally vulnerable individuals
Who should avoid it
- People with iron-deficiency anemia
- People with zinc deficiency
- People with osteoporosis
- Pregnant and breastfeeding women (insufficient data)
Pregnancy & breastfeeding
Insufficient safety data; avoid concentrated IP-6 supplements during pregnancy.
Interactions
IP-6 chelates iron and significantly reduces absorption; separate by at least 2 hours
IP-6 reduces zinc absorption; separate by at least 2 hours
IP-6 binds calcium in the gut; take separately
Food sources
| Food | Amount | %DV |
|---|---|---|
| Rice bran (1 oz) | high IP-6 (~1-2 g) | — |
| Beans (1 cup) | ~500-1000 mg phytate | — |
| Whole grains | variable | — |
Rice bran (1 oz)
- Amount
- high IP-6 (~1-2 g)
- %DV
- —
Beans (1 cup)
- Amount
- ~500-1000 mg phytate
- %DV
- —
Whole grains
- Amount
- variable
- %DV
- —
Choosing a product
What to look for on the label — and what to be skeptical of.
Look for…
Be skeptical of…
Frequently asked questions
Does IP-6 prevent cancer?⌄
Lab studies are interesting, but there is no human trial evidence that IP-6 prevents or treats cancer.
Will IP-6 cause mineral deficiency?⌄
It can reduce absorption of iron, zinc, and calcium when taken with food. Take separately if you have deficiency risk.
References by claim
antioxidant / free iron chelation
Graf et al., 1990 — PubMed (1990) link
Track IP-6 with Pilora
Set up dose reminders, check interactions, and join the community in the Pilora iPhone app.
Coming to App StoreDisclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you’re pregnant, breastfeeding, on medications, or managing a chronic condition.