The Research Evidence Base for Homeopathy
Systematic reviews of randomised controlled trials (RCTs) of homeopathy
Two major reviews of RCTs of
have reached broadly positive
Four of ve major comprehensive reviews of RCTs in homeopathy have reached broadly
Based on a smaller selection of trials, a fth review came to a negative
conclusion about homeopathy.
Positive conclusions have been reported in 9 of 35 reviews of RCTs in specic categories
of medical condition (the other 26 are largely inconclusive):
•allergies and upper respiratory tract infections
•seasonal allergic rhinitis
Placebo-controlled RCTs of homeopathy - the original data
Up to the end of 2014, the peer-reviewed literature included 153 papers reporting
placebo-controlled RCTs, of which 104 have data eligible for our analysis: 43 positive;
5 negative; 56 not statistically conclusive. In addition to the medical conditions above,
there is a positive balance of evidence in the following, for example:
There is evidence from singleton placebo-controlled RCTs in favour of homeopathy for
a number of other conditions including: bronchitis,
chronic fatigue syndrome,
Cost eectiveness of homeopathy
70.7% of 6,554 follow-up patients, treated at Bristol Homeopathic Hospital for a wide
range of chronic medical complaints, reported positive health changes.
Many patients who attended the Royal London Homeopathic Hospital were able to reduce or
stop conventional medication following homeopathic treatment.
Laboratory research has obtained evidence that water may retain information about
Additional laboratory studies have shown that homeopathic dilutions can exert biological
Integration of homeopathy with conventional treatment is associated with better clinical
outcomes for similar or lower costs.
Clinical observational studies
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Nathalie Parmentier is Klassiek Homeopaat en Orthomoleculaire Therapeut in Laren en omgeving en Amsterdam