Best Supplements for Panic Attacks

Why do panic attacks recur?

Every panic attack leaves a trace. Not a metaphorical one — a physiological one. The amygdala, responsible for recognizing threat, becomes more sensitive after each attack. The threshold at which the “fight or flight” reaction fires drops lower. In other words: the first attack raises the likelihood of the second, the second of the third.

This is why willpower and conscious-thinking exercises often do not work, or work only briefly. They help manage the symptom — but they do not remove the neurochemical imbalance that produces the attacks in the first place.

GABA deficiency — the real cause of panic attacks

GABA (gamma-aminobutyric acid) is the main inhibitory neurotransmitter in the brain. Its function is to halt overly active neuron excitation. When GABA-system activity falls, or the GABA-A receptors become less sensitive, the brain can no longer effectively suppress stress signals — and a panic attack can arise from the slightest cause. Put simply, the brain’s nervous system becomes oversensitive and reacts violently to even the smallest stress.

This is exactly why benzodiazepines (for example diazepam) work so fast: they bind directly to the GABA-A receptors and strengthen their activity. The problem is that over time the receptors adapt, the dose has to rise, and once use is stopped the attacks return with even greater force.

What weakens the GABA system’s balance? Magnesium deficiency, chronic sleep loss, alcohol and caffeine all weaken the GABAergic system. Read more about what harms and what strengthens the nervous system’s balance: Anxiety — what happens in the brain.

Ashwagandha for panic attacks — why it is not enough

Ashwagandha is an adaptogen — and that is both its strength and its weakness.

An adaptogen’s mechanism works through the HPA axis (hypothalamus-pituitary-adrenal). Ashwagandha lowers cortisol, dampens the stress-hormone cascade and helps the body tolerate chronic stress better. In short, ashwagandha helps the body adapt to stress, but it does not act on the direct cause of panic attacks in the brain. That is valuable — but it is not GABA-A receptor modulation.

Problem No. 1 — adaptation. The essence of an adaptogen is that the body adapts to its effect. This means that with longer use the effect naturally weakens — the body resets the HPA axis to a new balance. This is not a side effect — it is the biological principle of how an adaptogen works.

Problem No. 2 — it acts on the wrong system. Panic attacks arise from a GABA-A deficit and amygdala hypersensitivity — not from cortisol level. Ashwagandha acts on the adrenaline axis, not on the direct panic mechanism.

Where ashwagandha truly works well: chronic stress, raised cortisol, adapting to psychological load. If that is your problem, consider the highest-concentration ashwagandha extract with 10% withanolides from Zenius Labs™. But for panic attacks, the mechanism of action is the wrong one.

L-theanine for panic attacks — why it is not enough

L-theanine is one of the most popular natural calming agents — and its popularity is justified. But it is worth understanding exactly what it does and does not do.

L-theanine acts as a glutamate-receptor modulator — it competes with glutamate (the excitatory neurotransmitter) for receptors and so indirectly raises GABA activity. In other words, L-theanine dampens the brain’s excitatory substance, so the calming GABA system can work more freely. Note the word “indirectly” — L-theanine does not bind to the GABA-A receptors directly. That is an important difference.

Problem No. 1 — insufficient effect. An indirect effect has limits. The research shows L-theanine works effectively for people feeling mild anxiety, not for those with panic disorder. A 2024 systematic review of L-theanine’s effect in patients with mental disorders stressed that the evidence for panic attacks remains limited. Another systematic review of herbal effectiveness for anxiety found no statistically significant advantage of L-theanine over placebo.

Problem No. 2 — short half-life. L-theanine is metabolised quickly. This means that even when it works well, it does not provide the long-term GABA-system support needed to stop the attacks recurring.

Where L-theanine truly works well: falling asleep. The combination of GABA and L-theanine markedly improves how fast you fall asleep and the quality of NREM sleep. If your panic attacks mostly strike at night or while falling asleep, L-theanine as a sleep aid can be useful. As the main supplement against panic — insufficient.

Glycine for panic attacks — a symptom suppressor, not a cause solution

Glycine works differently from GABA — it activates its own receptors in the spinal cord and brainstem, reducing muscle tension and physiological arousal. Glycine also lowers body temperature at night, which makes falling asleep easier and reduces the likelihood of nocturnal panic attacks.

An important advantage: glycine can dampen the effect of adrenaline through the sympathetic nervous system — meaning the physical symptoms of an attack already under way (racing heart, trembling, heat) may be less intense. In a sense glycine is a symptom-dampener — and that should not be undervalued. If attacks strike at night, glycine as a supporting aid is genuinely useful.

The drawback: glycine does not provide long-term GABA-system support, does not stimulate nerve growth factor (NGF), and does not restore the amygdala’s sensitivity threshold. It helps when an attack hits — but it does not reduce the likelihood that an attack will arise at all. Read more about glycine and anxiety: Glycine for anxiety.

Vitexin — a direct GABA-A receptor agonist

Vitexin (a flavonoid glycoside from passionflower) does what neither ashwagandha nor L-theanine does: it binds directly to the GABA-A receptors — the very receptor that benzodiazepines bind to. The difference is that vitexin does not cause a reduction in receptor sensitivity, so tolerance does not develop. This means the body does not get used to vitexin and there is no need to raise the dose to achieve the same effect. No dependence. No withdrawal syndrome.

But here is an important nuance: not every “vitexin” product on the market is the same. A capsule of dried passionflower powder and a concentrated extract with a standardised vitexin content are two completely different products. The active compound must reach the brain in a sufficiently large amount to bind with the GABA-A receptors. So when choosing a supplement against panic attacks, a standardised extract is not an advantage — it is a necessity.

L-theanine, ashwagandha and glycine can be taken together with vitexin — their mechanisms of action do not clash, and in certain cases (especially regarding sleep) they complement one another.

H. erinaceus — restoring the nervous system

Hericium erinaceus (lion’s mane) works on a completely different level. It stimulates the synthesis of NGF (nerve growth factor) in the brain. NGF is responsible for the growth, survival and remyelination of neurons. Put simply, this mushroom helps the brain itself restore damaged nerve cells and their connections, improving brain function.

During chronic panic attacks, structural changes occur in the brain — the prefrontal cortex (responsible for rational assessment of stress) weakens, the amygdala strengthens. H. erinaceus does not just dampen symptoms — it promotes the physical recovery of nervous tissue. A clinical trial showed that 4 weeks of H. erinaceus significantly reduced anxiety and depression symptoms.

And again — as with vitexin, quality matters here. The market is full of products with dried-mushroom powder in which the amount of active polysaccharides is unknown. Clinically studied H. erinaceus preparations use concentrated extracts with a confirmed content of active compounds and erinacines. When buying any H. erinaceus product, it is worth asking not about the gram count in the capsule, but about the extraction method and the standardisation of the active substances.

Synergy: why vitexin and H. erinaceus work better together

The effects of vitexin and H. erinaceus appear at different times.

Vitexin — GABA-system support from the first weeks. The frequency and intensity of panic attacks fall faster, because the GABA system begins to work more effectively.

H. erinaceus — NGF stimulation over a longer period. Structural restoration of the nervous system, which keeps the attacks from returning after months or even years.

Vitexin 90 from Zenius Labs™ is the only product on the Lithuanian market that combines both of these active compounds in the form of concentrated extracts — not powders, but true standardised extracts.

What to expect and when?

First 2–4 weeks: the first changes — a general calming, fewer impulsive bursts of anxiety. First and second month: the frequency of panic attacks falls significantly. Three months and more: a structural effect — attacks do not recur even during stressful periods. What to avoid while taking it: caffeine and alcohol directly weaken the GABA-A system and neutralise vitexin’s effect.

Frequently Asked Questions