LAISHA · DRAVYAGUNA

Loha

लोह

Iron; loha bhasma is chiefly iron oxides, largely Fe2O3 and Fe3O4.

Parthiva · mineral origin · Dhatu

SHODHANA — NO MINERAL DRAVYA IS USED RAW

Heated red hot and quenched in tila taila, takra, gomutra, kanji and kulattha kwatha in turn, then marana over many puta with triphala bhavana.

Benefits & side effects

TRADITIONAL VIEW, WITH SAFETY LIMITS

What the texts say Loha does

What the evidence says. Some characterisation work exists on loha bhasma's oxide content. Clinical evidence against modern iron preparations is not established.

Side effects and limits

Iron overload is the real risk and it is not theoretical: iron has no active excretion route in the body. Haemochromatosis and thalassaemia are absolute contraindications.

Avoid or ask first: Haemochromatosis, thalassaemia and any iron overload state.; Active infection — free iron favours bacterial growth.

A traditional classification, not a recommendation. The full safety record is below.

Matra and anupana

AS THE CLASSICAL TEXTS AND THE API PRESCRIBE

Bhasma30–125 mg
AnupanaMadhu · Ghrita · Triphala kwatha
KalaAdhobhakta

The classical drug of pandu. Madhu and ghrita in equal quantity is the standard anupana and the texts warn against giving them in equal weight.

Reported from Sharangadhara Samhita and the Ayurvedic Pharmacopoeia of India. Laisha states what the texts prescribe; it does not recommend. No quantity here is adjusted for a particular person — not for agni, koshtha, bala, age, pregnancy, kidney or liver function, or anything already being taken.

Rasapanchaka

Rasa
TiktaKashayaMadhura
Guna
RukshaGuruSheeta
ViryaSheeta
VipakaMadhura
DoshakarmaKaphapittahara.

Karma and part used

RasayanaBalyaPandughnaMedoharaChakshushya
Upayukta angaLoha bhasma

Paryaya

AyasTikshnaKaleeyaka

Loha is classed among the Dhatu.

Names, by language

EnglishIron
HindiLoha
KannadaKabbina

Classical references

Rasa Ratna Samuccaya
Chapter 5
Among the dhatu; gives the three varieties — munda, tikshna and kanta — and their marana.
Bhavaprakasha Nighantu
Dhatvadi Varga
Rasa, guna and the use in pandu.

Rasa, guna, virya, vipaka and karma are recorded as the classical texts give them, with the text and section named so a student can open the book and check.

Adulterants and substitutes

Kanta loha is the magnetic variety and is the one the texts prefer; munda and tikshna are not interchangeable with it. Unmarana'd iron filings are not loha bhasma.

Identity

Iron; loha bhasma is chiefly iron oxides, largely Fe2O3 and Fe3O4.

A WAY TO REMEMBER IT

Loha in the oldest usage means metal in general, and narrowed to iron — the same narrowing English made when metal became a word for steel in the trades.

What the tradition holds

Loha bhasma is the classical treatment of pandu and appears in a large number of named yogas — Navayasa churna, Punarnava mandura and others.

Constituents. Iron; loha bhasma is chiefly iron oxides, largely Fe2O3 and Fe3O4.

What the evidence says

StatusSome characterisation work exists on loha bhasma's oxide content. Clinical evidence against modern iron preparations is not established.
The honest gapMineral and animal dravya are far less studied than plant dravya, and what study exists is chiefly characterisation and toxicology rather than clinical efficacy.

Safety

Iron overload is the real risk and it is not theoretical: iron has no active excretion route in the body. Haemochromatosis and thalassaemia are absolute contraindications.

ContraindicationsHaemochromatosis, thalassaemia and any iron overload state.
Active infection — free iron favours bacterial growth.
InteractionsOral iron supplements — additive, and iron overload is the consequence.
Tetracyclines, fluoroquinolones, levothyroxine, levodopa, bisphosphonates — iron binds all of these in the gut and reduces their absorption. Separate by at least two hours; this is the commonest real interaction of any mineral dravya.
Antacids and proton pump inhibitors reduce iron absorption in the other direction.
Pregnancy and breastfeedingIron is given in pregnancy in modern practice, but loha bhasma is not the same preparation and is not established as safe. Use a characterised iron preparation instead.

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What this is not

Sources

Rasa Ratna Samuccaya and Rasa Tarangini
National Institute of Indian Medical Heritage
The classical Rasashastra position: which group the dravya belongs to, its shodhana and marana, and the matra of the prepared form.
https://niimh.nic.in/ebooks/
Ayurvedic Pharmacopoeia of India
Pharmacopoeia Commission for Indian Medicine and Homoeopathy, Ministry of Ayush, Government of India
The official Indian pharmacopoeial standing of the dravya and the identity of the prepared article.
https://pcimh.gov.in/
Classical matra by dose form
Sharangadhara Samhita, Madhyama Khanda
The classical quantity for each dose form, as the standard reference gives it.
https://niimh.nic.in/ebooks/esharangadhara/
Mineral fact sheets
National Institutes of Health Office of Dietary Supplements
The established physiology of the element, its upper intake level and its documented interactions with medicines.
https://ods.od.nih.gov/factsheets/list-all/
Monographs for mineral and animal-derived ingredients
Health Canada, Natural and Non-prescription Health Products Directorate
A second regulator's position on the prepared ingredient, from a jurisdiction outside India.
https://www.canada.ca/en/health-canada/services/drugs-health-products/natural-non-prescription/applications-submissions/product-licensing/compendium-monographs.html
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