Ginger and fibromyalgia: central sensitization, substance P, and diffuse pain — what does science say?

Fibromyalgia: A Central Sensitization Disease

Fibromyalgia affects 2–4% of Belgians, with a strong female prevalence (9:1). It is not a "psychological" disease — it is a central sensitization disease: neurons in the dorsal horn of the spinal cord and the somatosensory cortex are "amplified," causing normal signals to be perceived as intense pain. Characteristics: diffuse pain in 18 pressure points, chronic fatigue, non-restorative sleep, cognitive fog, associated GI disorders.

Substance P (pro-nociceptive neuropeptide) is significantly elevated in the CSF of fibromyalgia patients. Inhibitory neurotransmitters (serotonin, norepinephrine) are decreased. Current treatments (duloxetine, pregabalin, milnacipran) target the same mechanisms.

Mechanisms of Ginger in Fibromyalgia

1. TRPV1 Desensitization → Reduction of Substance P

TRPV1 is massively expressed in nociceptive neurons (C-fibers). Chronic activation → continuous release of substance P and CGRP in the dorsal horn → maintained central sensitization. TRPV1 activation by gingerols paradoxically induces receptor desensitization (down-regulation) after initial stimulation → less substance P released → increased pain threshold. The same mechanism as slimming-thermogenesis-perte-poids-shot">capsaicin (QUTENZA patch used in algology).

2. Spinal Neuroinflammation (NF-κB in Microglia)

Spinal microglia are activated in fibromyalgia → production of IL-1β, IL-6, TNF-α → amplification of nociceptive signals → windup and spinal LTP (long-term potentiation). 6-gingerol inhibits NF-κB in spinal microglia → reduction of neuroinflammation → less amplification of pain signals.

3. Mitochondrial Neuroprotection (Nrf2)

Fibromyalgia is associated with chronic oxidative stress in spinal neurons and muscles (mitochondrial muscle dysfunction → diffuse pain). Nrf2 activated by ginger → glutathione peroxidase, HO-1, NQO1 → reduction of neuromuscular ROS → less pain of metabolic origin.

4. Serotonergic Modulation (Sleep and Pain)

Serotonin is both an inhibitory neurotransmitter of pain (descending pathways) and a sleep regulator (melatonin precursor). The gut-brain axis of ginger → increase in enteric serotonin → signal to brain → slight improvement in mood and sleep (non-restorative sleep = cardinal symptom).

Fibromyalgia Protocol