#Pruritus #ChronicPruritus #Vitamin
#Dermatology #Micronutrition
Chronic pruritus is a perplexing and
debilitating symptom common to many skin disorders (eczema, psoriasis,
urticaria), systemic diseases (chronic kidney disease, hepatic cholestasis),
and neuropathic conditions. Despite its prevalence, it often remains
poorly
controlled by conventional treatments such as antihistamines, corticosteroids,
or immunosuppressants. These strategies, though widely used, yield inconsistent
results, carry side effects, and are unsuitable for long-term management.
Given these limitations, interest in
better-tolerated alternatives has grown. Several
vitamins—particularly
D, B12,
B3 (niacinamide), and E—have shown promise due to their anti-inflammatory,
antioxidant, immunomodulatory properties, or their ability to strengthen the
skin barrier. However, results remain inconsistent, and no official
recommendations have yet been established.
This study was conducted to
evaluate the
efficacy of various vitamins in reducing the intensity of chronic pruritus,
regardless of its cause, examining outcomes based on the type of vitamin, route
of administration, and treatment duration.
Vitamins for itch relief?
This analysis reviewed 21 randomized controlled
trials involving 1,723 participants with
chronic pruritus of dermatologic,
systemic, or oncologic origin. The studies investigated
vitamins D2, D3, B3,
B12, and E, administered
orally or topically, over periods ranging from 4 to 52
weeks. The primary outcome was the
reduction in pruritus intensity measured via
standardized scales (VAS, SCORAD, UAS7).
The results demonstrated a
moderate but
significant effect of vitamins on pruritus intensity. The most pronounced
effects were observed with topical vitamin B12 and topical vitamin D3,
especially in cases of atopic eczema, renal-related or cancer-related pruritus.
Oral formulations—particularly vitamin B3 and E—also showed moderate
effectiveness. Oral vitamin D2 and D3 produced only modest results.
Short-term treatments (≤12 weeks) were
associated with
better outcomes than those exceeding 24 weeks, possibly due to
physiological adaptation or reduced adherence. Additional benefits were noted
in terms of skin lesions and inflammatory markers (TNF-α, IL-6, hsCRP).
Read next: Dupilumab in chronic spontaneous urticaria
Miracle vitamins or mirage?
Chronic pruritus is a debilitating symptom
often
resistant to standard treatments and significantly affects quality of
life. Despite its varied causes,
its management remains poorly standardized,
and current therapeutic options are often
ineffective in the long term or
poorly tolerated.
One of the key challenges is to offer
alternative, accessible, and better-tolerated therapeutic approaches that can
modulate inflammation, restore the skin barrier, and limit pruritus mediators
without major adverse effects.
In this context,
vitamins are attracting growing
interest, both for their biological properties and their potential for
therapeutic repurposing.
This study aimed to evaluate the
antipruritic
efficacy of topically or orally administered vitamins by comparing their impact
on pruritus intensity, associated skin lesions, and inflammatory markers. The
findings confirm that certain vitamins—especially topical B12 and D3—can
provide
significant relief, particularly in inflammatory dermatoses and
systemic pruritus.
Nevertheless, several major limitations
restrict the generalizability of the results (heterogeneous protocols, short
study durations, lack of long-term follow-up, absence of standardized
formulations), underlining the need for more rigorous future research. Such
studies should assess vitamin effects over longer periods, define optimal
doses, determine the best administration routes, and identify patient profiles
most likely to respond. Integrating vitamins into the therapeutic strategy for
pruritus could ultimately support more targeted, effective, and sustainable
care.
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