Natural Antihistamine: Which Foods, Herbs and Supplements May Help?
Some natural compounds have human allergy studies, but none is proven to replace standard antihistamine medicines across allergies, hives or histamine intolerance.
Vitamin C and Histamine Intolerance: Can It Help Lower Histamine?
Human studies suggest vitamin C can influence circulating histamine, but direct evidence for treating histamine intolerance is still missing.
Quercetin for Histamine Intolerance: Does It Actually Help?
Quercetin can inhibit mast-cell mediator release in experimental studies, but direct clinical evidence for histamine intolerance is still missing.
Tryptase Test: What the Blood Test Measures and What Results Mean
A tryptase result only makes sense in context: whether it was drawn during a reaction or at baseline, when it was collected, and...
PMDD and Histamine: Is There Really a Connection?
PMDD appears to reflect abnormal brain sensitivity to normal hormone shifts; histamine may overlap, but it has not been shown to cause the...
Histamine and Menopause: Can Hormonal Changes Affect Histamine Intolerance?
Menopause can change immune, vascular and mast-cell biology, but current evidence does not show that menopause directly causes dietary histamine intolerance.
Estrogen and Histamine: How Strong Is the Hormone Connection?
Estrogen can affect mast-cell signaling, but the popular estrogen–histamine feedback-loop theory goes further than current human evidence can prove.
Histamine and Acid Reflux: What the Evidence Actually Shows
Histamine helps control stomach acid through H2 receptors, but that does not mean histamine intolerance is an established cause of GERD.
Postprandial Hypotension: Symptoms, Causes, Diagnosis and Treatment
A drop in blood pressure after eating can cause sleepiness, dizziness or fainting, especially in older adults and people with autonomic dysfunction.
MCAS and POTS: Symptoms, Testing and What the Evidence Shows
POTS and MCAS can coexist, but current research does not establish that one causes the other or that MCAS is unusually common in...
Dermatographia (Dermographism): Symptoms, Causes, Testing and Treatment
Dermatographia, also called dermographism or skin writing, produces raised linear wheals after rubbing, scratching or pressure, and the itchy, recurrent form is called...
Hyperadrenergic POTS: Symptoms, Diagnosis and Treatment
Hyperadrenergic POTS describes a POTS phenotype with excessive sympathetic activation, often including raised upright norepinephrine or blood-pressure responses, though phenotype boundaries can overlap.
