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The Chemistry of Calm

How to Support Your Brain with Safe Nutritional Supplements

March 2011

Protect Yourself: Take the Sting Out of Cortisol

Do you long for a stress-free life? Do you wish that your stress hormones would go away and not come back? Actually, you wouldn’t want either of these, any more than you would want a life without pain. No one wants to be in pain all the time, but to be unable to feel pain at all creates a nightmare of its own. Likewise, if you were unable to mount a stress response, if your body suddenly became unable to produce the stress hormones, your physiology would collapse.

Stress is not the problem. It is unremitting stress and a constantly elevated level of cortisol that create the problems. The consequences can be severe. If it goes unchecked, elevated cortisol may cause weight gain, insulin resistance, or even type 2 diabetes; elevated blood pressure and coronary artery disease; memory problems and possibly dementia and other neurodegenerative diseases; and immune system problems, which may impair your body’s ability to fend off diseases of all types, including autoimmune disorders and even cancers.3

It is crucial to protect yourself with some of the following supplements: the steroid hormone DHEA, which tones down the effects of cortisol; the B vitamins, which help keep homocysteine (a harmful amino acid associated with heart disease, depression, and anxiety) in check; antioxidants; and herbal adaptogens such as rhodiola.
(See Rhodiola: Tonic Herb below.)

The Therapeutic Supplements

In addition to the basic supplements (see table The Resilient Supplement Plan), there are several therapeutic supplements, summarized in the table below.

I consider these supplements to be medicinal, with stronger therapeutic effects than the basic supplements. I’ve listed them roughly in the order in which I recommend them for the treatment of anxiety, with my first choices listed at the top.

If you are taking medication already, be sure to talk with your doctor before adding any of the supplements from these categories. And if you are considering going off medication, remember never to stop your medication suddenly—always consult with your doctor about how to safely taper off any psychiatric medication.

Typical Dosage
L-theanine 100–200 mg twice daily. Found in green tea; can be both calming and focusing.
5-HTP 50–100 mg up to three times daily. Boosts serotonin. Helps anxiety and depression.
NAC 600 mg up to three or four times daily. A potent antioxidant; recently shown to treat OCD.
Taurine 500 mg once or twice daily. Improves glutamate/GABA function.
Inositol 500–1,000 mg two to three times daily (studies use 12–18 g per day). Often considered a B vitamin, it can effectively treat panic, OCD, and phobic anxiety.
GABA 250–750 mg up to three times daily. Does not cross easily into the brain, so other measures may have more effect on GABA.
DHEA 5–10 mg daily, up to 50 mg daily. Get levels tested before taking.


L-theanine is an amino acid found in high concentrations in green tea. But you would have to consume an awful lot of it to get a therapeutic dose of theanine. You can get more by taking a green tea extract, but you can also take a supplement containing L-theanine alone, or in combination with other calming agents.

Researchers have found that it changes brain waves as measured on EEG, promoting the relaxed and alert state associated with alpha waves.4 That makes it unusual because it can sharpen mental focus and calm anxiety at the same time.

L-theanine is one of my most common treatments for anxiety and may help any of the seven types of anxiety. It is usually taken in doses from 50 to 200 mg once or twice daily. For severe anxiety, it may be taken three or four times per day. It is not habit-forming like so many anti-anxiety medications. There are no known drug interactions, but I recommend talking to your doctor before adding it to a medication.


While 5-HTP can also help sleep, it may be used during the daytime as well because it is not usually sedating. Considerable research has shown that 5-HTP can reduce anxiety, both general and panic, as well as improve mood.5

If you are already taking an SSRI, do not take 5-HTP without consulting your prescribing physician.

I usually recommend a starting dose of 50 mg daily, increasing every few days as tolerated. Most people do well with 100–150 mg daily, but the dose may safely go as high as 300 mg per day if needed. It is usually best to take it divided into two or three doses throughout the day, but if it is sedating it may all be taken at night. However, a small number of people actually have trouble sleeping from 5-HTP, and should then take it early in the day.

It may be best absorbed if taken half an hour before meals, and that can also reduce carbohydrate cravings for people who have them. But if that is a hassle or causes stomach upset, it is fine to take it with meals.

Tonic Herb: Rhodiola

Editor’s note: Many people prefer using tryptophan combined with its essential cofactors lysine and niacinamide in lieu of 5-HTP. Tryptophan is better able to remain stable in the blood and cross the blood-brain barrier, where it is converted to serotonin. If 5-HTP converts to serotonin in the blood, this serotonin will not cross the blood-brain barrier.


NAC is short for N-acetylcysteine. It has been used for years in emergency rooms for patients who are at risk for liver damage from something they have ingested (such as the common pain medication acetaminophen). It protects the liver for the same reason it protects the brain: it works as a powerful antioxidant, boosting levels of the body’s own primary antioxidant—glutathione.

As researchers have realized the connection between glutamate/GABA balance and anxiety conditions, they have begun experimenting with NAC. Recently, it has been used with one of the most complex anxiety illnesses—the spectrum of compulsive disorders (including OCD). Remarkably, researchers have found that this simple and inexpensive nutritional supplement works for such hard-to-treat problems as pathological gambling and compulsive hair-pulling (trichotillomania).6 Researchers at Yale are now conducting a placebo-controlled trial with patients whose OCD symptoms have not improved with other treatments.7

NAC typically comes in a dose of 600 mg and may be taken two or three times daily. Some of my patients have had mild headaches or stomach upset, but it is generally well tolerated, especially if you take it with food.

Tonic Herb: Rhodiola

A group of herbs known as herbal adaptogens or tonic herbs have long been used to strengthen immunity, improve energy, and enhance the body’s ability to handle stress. My favorite for someone with stress, anxiety, or even depression is Rhodiola rosea, also known as arctic root.

Traditionally, rhodiola has been used to improve energy and mental focus, but recent studies have looked at its benefits with anxiety and depression.11 A small study done at UCLA in 2008 showed that participants with general anxiety improved greatly on rhodiola, with minimal side effects.12 It may work by improving serotonin and dopamine levels and counteracting the effects of cortisol.13

Look for an extract standardized to at least 3 percent rosavins and about 1 percent salidrosides. A typical dosage is 100–250 mg twice daily, with breakfast and dinner. While it usually improves anxiety and even sleep, it is usually best not to take it just before bedtime. If it feels energizing, take it early in the day, with breakfast and lunch.

Editor’s Note: While it is generally considered safe for long-term use and is not known to interact with medications, rhodiola is contraindicated for individuals with bipolar disorder. Individuals diagnosed as bipolar, or who have a family history of bipolar disorder, should consult with a psychiatrist before taking rhodiola.


Taurine is an amino acid that increases glycine and GABA to calm the brain, and it also protects the brain by reducing the harmful effects of excess glutamate.8 You may be familiar with it, as it is added to some of the popular energy drinks such as Red Bull. Apparently the manufacturers see it as a means of further supporting someone during periods of extreme exertion, when taurine levels can become depleted. I don’t recommend replenishing it through energy drinks, but you may calm your brain if you boost your taurine levels in safer ways.

The Resilient Supplement Plan

Taurine is usually taken in doses of 500 mg one to three times daily. It can cause slight drowsiness and if so may be taken at bedtime. It has also been known to reduce blood pressure, so you should use care if you are prone to hypotension or light-headedness. It may be taken with or without food.


Inositol is often classified as a B vitamin, though technically it is not a vitamin since the body can produce it. Taken as a supplement, it has long been known to reduce general anxiety, panic, and OCD symptoms. Researchers found inositol to be just as effective as a popular antidepressant for panic disorder, and participants tolerated it well even at massive doses up to 18 grams per day.9

Inositol is often recommended at a dose of about 1,500 mg daily, though in studies it has been used at much higher doses. Its side effects are mild, including occasional nausea or diarrhea, dizziness, fatigue, and headache. There has been a report of inositol worsening bipolar disorder, and I do not recommend it if you have that condition.

Editor’s Note: The following table of basic supplements is recommended by Dr. Emmons to “support the brain and restore it to a more resilient state.” However, most Life Extension® members already include these supplements in their daily program.

The following table summarizes the supplements I recommend to support the brain and restore it to a more resilient state.

Typical Dosage
Multivitamin or B complex As directed on bottle. Aim for 25 mg of B6 twice daily as a rule of thumb. If cost is a factor, you may choose a B complex.
Vitamin D3 (vitamin D3 is the easier form of vitamin D for the body to use) 2,000 IU from October through April. May reduce to 1,000 IU in summer, or stop if in the sun 15-20 minutes daily. Consider getting your vitamin D level tested, especially if you live in the north and/or you have dark skin.
Omega-3: fish oil and/or flaxseed 2,000-4,000 mg fish oil; may augment with 2 tablespoons ground fl axseed daily. Fish oil is preferred, but vegetarians and the cost-conscious
may use flaxseed.
Tonic herb: rhodiola 200 mg daily. An herbal adaptogen, this may improve the body’s general response to stress.


GABA has already been discussed as the neurotransmitter most responsible for calming down an overactive brain, and it is available as a nutritional supplement without prescription. Then why isn’t it higher on my list of recommendations? If you take it by mouth, most of it gets broken down before it gets to the brain, so it is not as useful as you might think. Still, a portion of it does appear to get into the brain, and some of GABA’s calming effects may occur in the rest of the body, as with muscle relaxation. It has been shown in human studies to help create a relaxed alpha brain wave pattern even more effectively than L-theanine, and also to boost immune function in individuals who were subjected to stress.10

GABA may be taken in doses as small as 100 mg twice daily, up to 750 mg three times per day. If drowsiness occurs, take it just at bedtime.

The Chemistry of Calm


Dehydroepiandrosterone or DHEA is a steroid hormone produced in the adrenal glands, where cortisol and adrenaline are also made. It can be converted into testosterone and estrogen, and levels of DHEA are higher in men than in women. More and more physicians are recommending it, particularly in midlife or beyond, when DHEA levels drop below normal. Some clinicians recommend doses up to 50 mg or more. Levels can be monitored to be sure it doesn’t get too high.

by Henry Emmons, MD, Copyright 2010
Reprinted by permission of Touchstone, A Division of Simon & Schuster, Inc.


1. B. Hassel and R. Dingledine, “Glutamate,” in G. J. Siegel et al., eds., Basic Neurochemistry: Molecular, Cellular and Medical Aspects (Burlington, MA: Elsevier Academic Press, 2006).

2. A.H. Kim et al., “Blocking Excitotoxicity,” in F. W. Marcoux and D. W. Choi, eds., CNS Neuroprotection (New York: Springer, 2002): 3–36.

3. R. Peled et al., “Breast Cancer, Psychological Distress and Life Events Among Young Women,” BMC Cancer 8 (2008): 245.

4. K. Kobayashi et al., “Effects of L‑Theanine on the Release of Alpha-Brain Waves in Human Volunteers,” Journal of the Agricultural Chemical Society of Japan 72, no. 2 (1998): 153–157.

5. J. Lake, “Integrative Management of Anxiety,” Psychiatric Times 25, no. 1 (January 2008): 13–16.

6. J. Grant et al., “N-Acetyl Cysteine, a Glutamate-Modulating Agent, in the Treatment of Pathological Gambling: A Pilot Study,” Biological Psychiatry 62, no. 6 (2007): 652–657; J. Grant et al., “N-Acetylcysteine, a Glutamate Modulator, in the Treatment of Trichotillomania,” Archives of General Psychiatry 66, no. 7(July 2009): 756–763.


8. M. Mori et al., “Beta-Alanine and Taurine as Endogenous Agonists at Glycine Receptors in Rat Hippocampus in Vitro,” Journal of Physiology 539 (2002): 191–200; H. Wu et al., “Mode of Action of Taurine as a Neuroprotector,” Brain Research 1038, no. 2 (March 2005): 123–131.

9. A. Palatnik et al., “Double Blind, Controlled, Crossover Trial of Inositol Versus Fluvoxamine for the Treatment of Panic Disorder,” Journal of Clinical Psychopharmacology 21, no. 3 (2001): 335–339.

10. A. Abdou et al., “Relaxation and Immunity Enhancement Effects of Gamma- Aminobutyric Acid (GABA) Administration in Humans,” BioFactors 26 (2006): 201–208.

11. V. Darbinyan et al., “Clinical Trial of Rhodiola rosea L. Extract SHR-5 in the Treatment of Mild to Moderate Depression,” Nordic Journal of Psychiatry 61, no. 5 (2007): 343–348.

12. A. Bystritsky et al., “A Pilot Study of Rhodiola rosea (Rhodax) for Generalized Anxiety Disorder (GAD),” Journal of Alternative and Complementary Medicine 14, no. 2 (2008): 175–180.

13. F. Khanum et al., “Rhodiola rosea: A Versatile Adaptogen,” Comprehensive Reviews in Food Science and Food Safety 4 (2005): 55–62.