Herbs & Supplements for Anxiety and ADHD
What Generations Have Known: Ancient Wisdom, Modern Relief
By Kenya Guarnieri, PhD, HSPP, NCSP — Licensed Psychologist and School Psychologist specializing in neurodivergence across the lifespan
Disclaimer: The statements and information presented in this article have not been evaluated by the U.S. Food and Drug Administration (FDA). The supplements and herbs discussed here are not intended to diagnose, treat, cure, or prevent any disease or medical condition. Always consult a qualified healthcare provider before beginning any supplement regimen, especially if you are pregnant, nursing, taking prescription medications, or have an existing medical condition. Individual results vary.
Human beings have grappled with restless minds, scattered attention, and overwhelming worry since the beginning of recorded time. Long before clinical trials existed, knowledge of plants and their gifts was preserved and passed down through oral tradition, story, and lived experience, generation after generation. This article honors that lineage while encouraging you to work alongside modern medicine, not against it.
Anxiety and ADHD are not modern inventions. The ancient Greeks had words for the restless, racing mind. Medieval herbalists catalogued remedies for “melancholy” and “nervous affliction.” Indigenous healers across every continent developed sophisticated plant-based systems for calming the body and sharpening focus. These weren’t guesses — they were observations refined across countless generations, tested in the laboratory of lived human experience.
Today, science is catching up. Researchers are increasingly validating what traditional healers long understood: that certain plants and compounds can meaningfully support mental clarity, emotional regulation, and nervous system balance. The supplements below represent a bridge between ancient knowledge and modern understanding — each with its own story, its own chemistry, and its own place in the vast, ongoing conversation between humans and the natural world.
If you’re navigating the relentless hum of anxiety, the scattered energy of ADHD, or simply seeking a gentler way to support your mind, this guide is offered with deep respect for both traditions — the ancestral and the scientific.
1. Ubiquinol & CoQ10
Also known as: Coenzyme Q10 · Ubiquinone · The Cellular Spark
Best for: Energy, Cognitive Support, ADHD
Every cell in your body produces energy through tiny structures called mitochondria — and Coenzyme Q10 (CoQ10) is the essential spark that keeps them running. Found naturally in organ meats, fatty fish, and some vegetables, CoQ10 has been used in integrative medicine for decades to support cellular energy production, protect against oxidative stress, and promote heart and brain health.
Ubiquinol is the active, reduced form of CoQ10 — the version your body actually uses. Its oxidized counterpart, Ubiquinone, must be converted by the body before it can be utilized. As we age, or when we’re under chronic stress, this conversion becomes less efficient, making Ubiquinol supplementation particularly valuable. For individuals with ADHD, whose brains are often working overtime with significant metabolic demand, adequate cellular energy is foundational.
Research suggests CoQ10 may help reduce mental fatigue, support neurotransmitter synthesis, and mitigate the oxidative burden on brain cells. Those with anxiety may also benefit, as chronic stress depletes CoQ10 levels — creating a cycle that supplementation can help interrupt.
2. N-Acetylcysteine (NAC)
Also known as: Glutathione Precursor · The Detox Ally
Best for: Anxiety, ADHD, Mood
N-Acetylcysteine, known as NAC, is a derivative of the amino acid L-cysteine and a direct precursor to glutathione — the body’s most powerful antioxidant. While NAC has long been used in emergency medicine, its applications in mental health are increasingly being explored with remarkable results.
NAC modulates glutamate, one of the brain’s primary excitatory neurotransmitters. When glutamate activity is dysregulated — as is frequently the case in anxiety disorders, OCD, and ADHD — the nervous system can become stuck in a state of hyperactivation. NAC helps restore balance to this system, offering a pathway out of the loop of intrusive thoughts, compulsive behaviors, and overwhelm.
Several studies have examined NAC’s potential benefits for ADHD symptoms including impulsivity and inattention, as well as for anxiety-related conditions. It also replenishes glutathione, helping the brain clear the oxidative debris that accumulates under chronic stress.
3. Magnesium Glycinate
Also known as: The Relaxation Mineral · Mg-Glycinate
Best for: Anxiety, ADHD, Mood
Magnesium is involved in over 300 enzymatic reactions in the human body — and yet, an estimated 50% of Americans are deficient in this essential mineral. The consequences are far-reaching: poor sleep, muscle tension, heightened stress response, difficulty concentrating, and a nervous system that simply cannot unwind.
Magnesium glycinate is magnesium bound to glycine, an amino acid with its own calming properties. This combination is considered one of the most bioavailable and gentle forms of magnesium, readily absorbed without the digestive upset that other forms can cause. Together, magnesium and glycine work synergistically to quiet the NMDA receptor system — the same system implicated in anxiety, hyperarousal, and attentional dysregulation.
Magnesium-rich plants — dark leafy greens, seeds, nuts — have anchored traditional diets for millennia. Our ancestors consumed magnesium abundantly. We, largely, do not. For individuals with ADHD, magnesium deficiency has been specifically noted in research as more prevalent than in the general population. Supplementing with magnesium glycinate may support deeper sleep, reduced hyperactivity, and a calmer baseline — the foundation upon which focus and emotional regulation can be built.
4. Lavender
Also known as: Lavandula angustifolia · Silexan · The Purple Healer
Best for: Anxiety, Mood
Lavender has been treasured across cultures for thousands of years — from Roman bath rituals to Provençal folk medicine to the sachets tucked into Victorian pillows. Its calming properties are not mere folklore: lavender is one of the most extensively studied botanical remedies for anxiety in the modern era.
The primary active compounds in lavender essential oil — linalool and linalyl acetate — interact with GABA receptors in the brain, the very same receptors targeted by anti-anxiety medications. Unlike pharmaceutical anxiolytics, however, lavender does not carry the risk of dependence or cognitive dulling. Orally administered lavender oil (in formulations like Silexan, the most researched form) has shown effects comparable to benzodiazepines in some clinical trials for generalized anxiety disorder.
Aromatherapy with lavender — whether through diffusion, topical application, or bath soaks — offers a gentler, more accessible entry point. Research has documented reductions in cortisol levels, heart rate, and subjective anxiety with lavender aromatherapy, making it one of the most accessible and evidence-supported herbal tools available for daily anxiety management.
5. L-Theanine
Also known as: Green Tea Amino Acid · The Calm Focus Molecule
Best for: Anxiety, ADHD, Cognitive Support
Found almost exclusively in tea leaves — particularly green tea — L-theanine is the amino acid responsible for that distinctive quality of tea-induced calm: alert, clear-headed, and focused, without the jagged edge of caffeine alone. Japanese monks famously drank green tea before meditation to achieve precisely this state: alert presence without agitation.
L-theanine promotes alpha brainwave activity — the neural signature of relaxed alertness — and modulates levels of GABA, dopamine, and serotonin. This combination makes it particularly compelling for both anxiety and ADHD: it quiets the noise without dimming the signal. When paired with caffeine (as it naturally occurs in tea), L-theanine smooths out caffeine’s stimulating effects, reducing jitteriness while preserving and even enhancing focus.
Standalone L-theanine supplementation (typically 100–200mg) has been studied for its effects on stress response, sleep quality, and attentional performance. It is notably fast-acting — many people report effects within 30–60 minutes — and has an exceptional safety profile with virtually no reported adverse effects at standard doses.
6. Turmeric
Also known as: Curcuma longa · The Golden Root · Haridra
Best for: Anxiety, Mood, Cognitive Support
Turmeric is a bright yellow spice derived from the root of the Curcuma longa plant — a member of the ginger family native to South and Southeast Asia. For over 4,000 years, it has been central to Ayurvedic medicine, and its active compound, curcumin, is responsible for both its vivid color and its remarkable biological activity.
Curcumin is a potent anti-inflammatory and antioxidant that crosses the blood-brain barrier, where it may exert meaningful effects on neuroinflammation — increasingly understood as a key driver of both anxiety and depression. It appears to modulate serotonin and dopamine pathways, support neurogenesis (the growth of new brain cells), and reduce the inflammatory cytokines that can dysregulate mood and cognition.
Bioavailability is a key consideration: curcumin is poorly absorbed on its own but is dramatically enhanced by black pepper (piperine) or fat-based delivery systems. Many quality supplements combine curcumin with piperine for this reason. For those who prefer a culinary approach, golden milk — turmeric blended with warm milk, black pepper, and honey — is a traditional remedy as delicious as it is therapeutic.
7. Saffron
Also known as: Crocus sativus · The World’s Most Precious Spice
Best for: Anxiety, Mood, ADHD
Saffron is the hand-harvested stigma of the Crocus sativus flower — it takes roughly 150,000 blossoms to yield a single kilogram, making it the world’s most expensive spice by weight. Yet its use as a mood-enhancing medicine stretches back to ancient Persia, Egypt, and Greece, where it was prescribed for melancholy, nervousness, and restlessness long before the concept of a neurotransmitter existed.
Modern research has produced some of the most exciting findings in botanical psychiatry around saffron. Its active compounds — safranal and crocin — appear to inhibit serotonin reuptake (a mechanism shared with SSRI antidepressants), reduce cortisol, and protect neurons from oxidative damage. Multiple randomized controlled trials have found saffron supplementation (30mg/day of standardized extract) to be comparable to prescription antidepressants for mild to moderate depression and anxiety.
Emerging research also suggests saffron may benefit ADHD symptoms in children and adults — improving attention, reducing hyperactivity, and supporting emotional regulation — with a gentler side effect profile than stimulant medications.
8. Ginger
Also known as: Zingiber officinale · The Root of Warmth
Best for: Anxiety, Cognitive Support, Mood
Ginger is one of the oldest and most universally used medicinal plants on Earth — documented in ancient Chinese, Ayurvedic, Greek, and Arabic medicine. Prized for millennia as a digestive aid, warming tonic, and anti-nausea remedy, ginger’s relationship with the nervous system runs deeper than most people realize.
The gut-brain axis — the bidirectional communication highway between the enteric nervous system and the central brain — is increasingly recognized as central to mental health. The majority of the body’s serotonin is produced in the gut, and inflammatory disruption of gut function has direct consequences for mood, cognition, and stress response. Ginger’s powerful anti-inflammatory and gut-protective properties therefore offer a meaningful indirect pathway to mental wellness.
Gingerols and shogaols, ginger’s primary bioactive compounds, have demonstrated antioxidant effects on brain tissue, neuroprotective properties, and direct anxiolytic effects in research studies. Ginger also supports circulation, including cerebral blood flow, which underpins the sustained attention and executive function often challenged in ADHD. Whether as fresh root tea, capsules, or generous use in cooking, ginger is one of the most accessible and time-honored allies for the anxious or scattered mind.
9. American Ginseng
Also known as: Panax quinquefolius · The Tonic Root · Five-Fingers
Best for: ADHD, Cognitive Support, Anxiety, Energy
American ginseng (Panax quinquefolius) is a woodland plant native to the forests of eastern North America, revered by many Indigenous nations for centuries as a sacred restorative — used for fatigue, nervous exhaustion, and cognitive vitality. Distinct from its Asian cousin (Korean/Panax ginseng), American ginseng is considered gentler and more nourishing to the nervous system, making it particularly suited to those who run stressed or anxious.
American ginseng is classified as an adaptogen — a category of herbs that help the body mount a more balanced, resilient response to physical and psychological stress. Its ginsenoside content modulates the HPA axis (the body’s primary stress-response system), reducing cortisol dysregulation and supporting the kind of sustained, steady energy that anxious and ADHD brains often struggle to access.
Clinical research has shown promising results for American ginseng in working memory, sustained attention, and processing speed — domains central to ADHD management. Its calming adaptogenic properties also make it valuable for anxiety, particularly the burnout-adjacent exhaustion that often accompanies chronic hypervigilance. Look for standardized extracts with verified ginsenoside content for consistent results.
A Living Tradition
The plants and compounds described here are not new discoveries. They are old friends — some known to the women who gathered herbs in ancient forests, some to the physicians who wrote on papyrus or palm leaf, some to the grandmothers who pressed ginger tea into trembling hands. We are not inventing wellness. We are remembering it.
Anxiety and ADHD are real, and they deserve serious attention — including, when appropriate, the full resources of modern medicine. These supplements work best not as replacements for professional care, but as part of a thoughtful, holistic approach: alongside good sleep, movement, connection, and honest conversation with a healthcare provider who respects the whole of who you are.
Start low, go slow. Notice what shifts. Trust the story your body tells — it has been listening to nature far longer than any of us have been alive.
Not evaluated by the FDA · Consult your healthcare provider