What are the different types of headaches and their specific mechanisms?
Headaches are classified by the ICHD-3 into more than 200 types. Three primary categories require a differentiated preventive approach:
- Tension-type headaches (60–70%): bilateral, band-like pain; musculo-facial mechanism. Respond well to relaxation techniques, magnesium, and behavioral therapies.
- Migraines (15–20% of the population): unilateral throbbing pain, trigeminal-vascular mechanism, and pervasive cortical depression.
- Cluster headaches: unilateral periorbital pain of extreme intensity, occurring in “clusters” of 1 to 8 episodes per day for 2 to 12 weeks. Mechanism: hypothalamic activation with release of CGRP (calcitonin gene-related peptide). Highly debilitating—a neurological consultation is essential for long-term treatment.
Does vitamin D3 prevent chronic headaches?
Vitamin D3 plays a well-documented role in the pathophysiology of headaches. Vitamin D3 deficiency (< 20 ng/mL) has been associated with a higher prevalence of chronic headaches in several studies. Its mechanisms:
- Modulation of the TPH2 gene (tryptophan hydroxylase 2): regulates the synthesis of serotonin—a neurotransmitter whose fluctuations trigger migraines.
- Reduction of CGRP: inhibits the production of this key neuropeptide in the pathophysiology of migraines.
A meta-analysis (2019) confirms that supplementation to normalize levels reduces the monthly frequency of migraines by an average of 2.2 days. A serum test is recommended before starting supplementation.
Is melatonin effective for cluster headaches?
Melatonin is particularly promising for headaches due to its action on the hypothalamus—the site of the hyperactivity that triggers cluster headaches:
- Cluster headaches: Pilot studies show that melatonin (10 mg at bedtime) reduces the frequency and intensity of episodic attacks by modulating the hypothalamic clock and reducing CGRP.
- Migraines: Two randomized trials (Peres, 2004; Gonçalves, 2016) show that melatonin (3 mg at bedtime) reduces the frequency of migraines to a degree comparable to amitriptyline, with fewer side effects. Its mechanisms: inhibition of prostaglandins, reduction of neuronal oxidative stress, and reduction of CGRP.
Do omega-3s prevent chronic headaches?
Omega-3s (EPA and DHA) influence the pathophysiology of headaches through two mechanisms:
- Production of anti-inflammatory resolvins by competing with arachidonic acid (omega-6) for the enzymes COX and LOX—thereby reducing central trigeminal inflammation.
- Reduction of plasma CGRP: A randomized controlled trial (Ramsden et al., BMJ 2021) using a diet enriched with omega-3s (3 to 4 g EPA+DHA/day) showed a significant reduction in the frequency and intensity of migraines.
Does turmeric relieve headaches of inflammatory origin?
Turmeric (curcuminoids + piperine) inhibits several pathways involved in headaches:
- Inhibition of COX-2 and NF-κB: reduces prostaglandin E2, a key mediator of trigeminal pain.
- Reduction of central trigeminal sensitization via TRPV1 expression (capsaicin receptor on trigeminal C-fibers).
Preliminary studies in migraine sufferers show a reduction in attack frequency with standardized extracts that have high bioavailability (BCM-95 or Meriva).
Vitamins B6 and B12 for homocysteine-related headaches?
Hyperhomocysteinemia is an independent risk factor for migraines and chronic headaches. Vitamin B6 converts homocysteine into cystathionine—a deficiency in vitamin B6 is more common in women taking oral contraceptives, an additional risk factor for hormonal migraines. Vitamin B12 (methylcobalamin) and vitamin B9 act as cofactors for methionine synthase. The MIGRA trial shows that supplementation with B6, B9, and B12 reduces the frequency of migraines with aura by 50% by normalizing homocysteine levels.
