What it is
L-Histidine is an essential amino acid that contributes to histamine synthesis, carnosine (with beta-alanine), and filaggrin in skin. Plasma histidine runs low in chronic systemic inflammation.
Supplement · Amino Acid & Mucosal Health
L-Histidine
Histidine
500–4000 mg · vegan · gluten-free · 60 caps
skin-breakoutsdry-skinjoint pain skingut
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How it works
Restoring plasma histidine supports filaggrin synthesis in epidermal cells, improving the skin barrier in eczema. It also feeds carnosine, an intracellular antioxidant.
Who should take it
Adults with atopic dermatitis, runners with skin barrier breakdown, vegetarians with low plasma histidine on lab work.
Avoid / careful
Active systemic mastocytosis. Caution in women with strong mast-cell-driven cycles.
When to take it
Morning
Noon
Evening
Night
How to take it
With food
Empty stomach
Before food
Flexible — works in any of the above.
FAQs
Frequently asked
Can L-Histidine help with skin dryness?
Yes, by supporting filaggrin synthesis, L-Histidine can improve the skin barrier, reducing transepidermal water loss and improving hydration in dry skin conditions like eczema.
Is L-Histidine useful for athletes?
Yes, L-Histidine is a precursor to carnosine, an antioxidant that buffers muscle acidity during intense exercise. It may also help maintain skin barrier integrity, which can be compromised by sweat and environmental factors during prolonged activity.
How does L-Histidine relate to histamine intolerance?
While L-Histidine is a precursor to histamine, supplementation is generally considered for restoring deficient histamine pools or supporting carnosine/filaggrin synthesis, not for exacerbating histamine intolerance. However, individuals with severe histamine intolerance should consult a healthcare provider.
Research summary
A plain-English read of the literature behind this supplement. Not a clinical recommendation.
A Japanese RCT in adult atopic dermatitis showed SCORAD reductions at 4 g/day over 8 weeks. Carnosine synthesis benefits are mechanistic, not endpoint-trial.
From the blog
Editorial notes
SacredBod's longer take on L-Histidine — context the structured blocks above don't capture.
L-Histidine is a amino acid & mucosal health supplement. L-Histidine is an essential amino acid that contributes to histamine synthesis, carnosine (with beta-alanine), and filaggrin in skin. Plasma histidine runs low in chronic systemic inflammation.
How it works
Restoring plasma histidine supports filaggrin synthesis in epidermal cells, improving the skin barrier in eczema. It also feeds carnosine, an intracellular antioxidant.
Who it’s for
Adults with atopic dermatitis, runners with skin barrier breakdown, vegetarians with low plasma histidine on lab work.
Dosage & timing
- Typical dose: 500–4000 mg
- Best time: evening
- With food: flexible
- Expected onset: 4–6 weeks for skin and gut markers.
India context
Availability on Amazon India is currently limited or import-only for this form. International brands (iHerb, NOW Foods, Doctor’s Best) ship to India with variable customs handling. Local Ayurvedic equivalents may offer overlapping benefits.
Safety
Active systemic mastocytosis. Caution in women with strong mast-cell-driven cycles.
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