Woody McGinnis' recommendations for nutrients.

Strategy: Assure Generous Levels of the Key Nutrients 1. Vitamin B6: Pyridoxal-5-phosphate is activated form. 2. Magnesium: glycinate form most absorbable. 3. Zinc: Picolinate form most absorbable. Dose away from minerals and food which block absorption. Balance with manganese. Warts, stretch marks, flecks subside. 4. Calcium: Assure RDA of about one gram daily plus some require extra. 5. Selenium: Doses up to 200 mcg daily as anti-oxidant and to bind mercury. 6. Vitamin A: Cod liver oil for all behavioral children unless allergic to cod. 7. Vitamin C: Twice-daily dosing rationale; also helps regularize bowel movement. 8. Vitamin E: Important chain-breaking anti-oxidant. 9. Fish Oil: Quiet inflammation with EPA. High EPA/DHA preparations available. 10. Evening Primrose Oil: Good for the gut, growth and immunity. Particularly Important for Immunity: Zn, Vitamin A, GLA

Oxidative stress and neurochemicals

Oxidative stress and chronic fatigue syndrome Another speaker, Christian Renna, DO, presented an interesting thesis that without sufficient serotonin and antioxidant defenses, the brain decides that it's not safe to produce dopamine and norepinephrine—hence chronic fatigue and related neurosomatic disorders. A central feature of chronic fatigue-like disorders is a deficiency of norepinephrine. But simply increasing norepinephrine through pharmacological means is not appropriate, since the brain is already overwhelmed with stress, and thus with free radicals. In Renna's view, both stress reduction and antioxidant supplements are absolutely necessary to help the brain produce and maintain inhibitory and excitatory neurotransmitters in proper ratios. This applies not only to those diagnosed with chronic fatigue, but to all of us, especially as we age. In the presence of excess free radicals, the brain seeks to protect itself by lowering its activity. This means lower production of excitatory neurotransmitters such as dopamine, and less energy production in the mitochondria. Every neuron has an excitatory threshold beyond which it will not fire, Renna explained. Instead, the overstimulated neuron shifts to an “escape pathway,” preventing the synthesis of dopamine and norepinephrine. In chronic fatigue, the neuroexcitatory threshold is set too low. Raising it requires increasing the brain's safety mechanisms: serotonin and antioxidants. “If the cell doesn't need to fear oxidative stress, the mitochondria light up like Las Vegas,” Renna said. He also pointed out that many chronic fatigue patients responded well to fen/phen, which was a combination of a serotonin-raising drug and an amphetamine analogue. “Overcoming serotonin deficiency allows the brain to tolerate more norepinephrine,” Renna said. He didn't favor long-term use of antidepressants, however. He felt such use prevented the patient from achieving a more complete recovery. The point is to help the brain produce more of its own serotonin. Thus, we need to address the necessity of lowering stress—not only emotional stress, but also stress coming from chronic low-grade infections, toxins (including endotoxins [toxins produced within the body] originating in the gut under conditions of dysbiosis, meaning an overgrowth of harmful intestinal flora), excess calories, insufficient sleep or any other source. “The more gentle the stimulation, the better,” Renna said. “So don't rush.” In addition, we must make sure the patient's antioxidant defenses are adequate before we use any kind of stimulant. “If a person is not energetic, maybe it's not safe for them to be energetic,” Renna said, again reinforcing the point about low serotonin and depleted antioxidant defenses. Both need to be corrected through stress reduction, diet, the right exercise and supplements. The brain will produce more dopamine when it becomes safe to do so. Dopamine is a very energizing, feel-good neurotransmitter; in addition, dopamine stimulates the release of nerve growth factors. But dopamine has its dark side. “Dopamine is the most dangerous of all neurotransmitters because the brain needs to defend itself against overstimulation,” Renna explained. When serotonin is low, the threshold for what constitutes overstimulation is also set low. Low serotonin, low dopamine, and low energy production in cerebral mitochondria all lead to a cascade of harmful consequences. Since the brain is in constant chemical communication with the rest of the body, including the endocrine system and the immune system (in fact Renna calls the immune system “morcelized brain”), the whole body suffers. We see this not only in the chronic fatigue syndrome, but above all in aging. Tofu has recently come under suspicion as deleterious to the brain. In an ironic reversal of our previous beliefs, coffee and tea are now seen as neuroprotective, while tofu is increasingly under attack. Renna also discussed neuroprotective supplements. His special emphasis was on flavonoids as particularly effective antioxidants and neuroprotectants. Flavonoids (such as those present in blueberries and bilberries, green tea, grape seed extract, and various fruits and vegetables) not only raise glutathione levels, but also help prevent inflammation by inhibiting the enzymes in the lipoxygenase family (LOX), which NSAIDs and COX-2 inhibitors cannot do. Renna added folic acid, SAMe and acetyl-l-carnitine to the list of essential neuroprotective supplements. As for the so-called smart drugs, such as deprenyl and piracetam, these too are worth looking into, according to Renna. They increase energy production while reducing oxidative stress (acetyl-l-carnitine works the same way). Tofu has recently come under suspicion as deleterious to the brain. In an ironic reversal of our previous beliefs, coffee and tea are now seen as neuroprotective, while tofu is increasingly under attack. Renna takes his patients off tofu, at least until there is some solid new evidence of its safety. Both Perlmutter and Renna covered a huge territory, at times overwhelming the audience. Permutter focused on the “anti-inflammatory breakthrough”: preventing and fighting inflammation in the prevention and treatment of Alzheimer's disease, as well as on the use of intravenous glutathione, the body's chief detoxifying compound, as a new and potentially revolutionary treatment for Parkinson's disease. Perlmutter also touched on the production of energy in the cerebral mitochondria, a subject developed more fully by Renna. The main message was clear: we already know a great deal about preventing and treating brain diseases and age-related cognitive and motor dysfunction. Relatively simple measures such as reducing caloric intake and taking fish oil, NSAIDs, lipoic acid and CoQ10 could save millions from terrible brain diseases. It is high time to start implementing this knowledge on a much broader scale. Antioxidants against vitamins: lipoic acid and selenium improve the survival of AIDS patients The excitement over the new anti-retroviral drugs designed to fight the AIDS virus is yielding to a sober assessment of their limitations. By now it has been shown that these drugs do not fully restore immune function. They are not the long-awaited cure. Their side effects are so severe that many AIDS patients drop out of treatment. In addition, the majority of the virus is in the latent stage in the nuclei of T cells, and antiviral drugs cannot affect latent viruses. Are there effective alternative treatments? An affirmative answer was compellingly presented by two speakers: Raxit Jariwalla, PhD, a research scientist at California Institute for Medical Research in San Jose, and Lynn Patrick, ND, medical director of HIV Wellness Program in Tucson, Arizona. The speakers cited study after study showing improved survival rate for AIDS patients who used certain critical supplements known to reduce oxidative stress (a major factor in the progression of the disease) and, in some cases, to significantly suppress viral reproduction. Both presenters singled out lipoic acid as particularly important. All antioxidants are also anti-inflammatory agents, but lipoic acid is regarded as an especially effective anti-inflammatory. It has been known for almost a decade that lipoic acid effectively inhibits the replication of the AIDS virus in vitro. This is not surprising in view of our knowledge that lipoic acid inhibits the activation of Nuclear Factor kappa B (NFkB), which is believed to play an important role in the activation of the HIV virus. Essentially, the latent virus is activated by certain inflammatory cytokines that result from the activation of NFkB. These cytokines include Tumor Necrosis Factor alpha (TNF alpha)—hence the goal of reducing TNF alpha, and the similarity between alternative treatments against AIDS and hepatitis, Dr. Patrick pointed out. Both protocols emphasize lipoic acid, selenium and a combination of various other antioxidants. In addition, many AIDS patients are co-infected with Hepatitis C. “All AIDS patients need liver support,” Patrick said. In addition to 500 mg of lipoic acid/day, she also uses silymarin, shown to be remarkably effective in restoring liver health. Lyn Patrick largely confirmed Dr. Jariwalla's primary emphasis on lipoic acid, stating that “lipoic acid is of extreme importance for HIV patients.” She reinforced this with some added details. Studies have found that lipoic acid inhibits reverse transcriptase (a viral enzyme needed for replication), and makes AZT significantly more effective. Another obvious reason for the importance of lipoic acid for HIV patients is its ability to raise glutathione, our chief detoxifier and a crucial endogenous antioxidant. Glutathione is low in all serious illnesses. When the levels of glutathione rise, the result is reduced oxidative stress. The role of oxidative stress has been neglected in the discussion of AIDS, with the public getting the impression that the sole factor in the progression of this disease is the presence of AIDS virus, commonly referred to as HIV. Yet oxidative stress and consequent inflammation play a major role in whether symptoms of AIDS will appear at all, and in the rate of progression. Some people who are HIV positive do not show any symptoms of AIDS. Interestingly, this group tends to have a higher intake of antioxidants, from diet or supplements or both. Even merely taking a multivitamin turned out to reduce the risk of developing the symptoms of AIDS by 33% in HIV-positive individuals. While lipoic acid plays a starring role in the alternative treatment for HIV patients, another thiol (i.e. sulfur-containing) antioxidant, the acetylated form of cysteine known as NAC, appears to be somewhat helpful as well. NAC too helps raise the levels of glutathione, but by itself it is not likely to have enough effect in AIDS patients; lipoic acid is far more efficient at raising glutathione and blocking NFkB. The special effectiveness of lipoic acid may derive from the fact that it's a dithiol (it has two sulfur groups), while NAC is a monothiol. NAC is more effective when used with other antioxidants. In particular, it synergizes with high-dose ascorbate. High-dose ascorbate, Dr. Jariwalla stated, is unique in that it recycles itself to the reduced state. It also produces “dramatic dose-dependent suppression of viral reproduction.” It is believed that high-dose ascorbate suppresses viral replication through a different mechanism than thiol antioxidants (lipoic acid and NAC) and selenium. Some participants suggested that intravenous delivery of ascorbate would be most effective, due to the large dose required (6 to 12 grams if taken orally). Selenium also plays a starring role in anti-viral regimens. It too inhibits NFkB. But the main reason that selenium is known as “birth control for viruses” derives from the fact that many viruses, including HIV, need selenium to replicate. Interestingly, in a selenium-rich milieu the viral genes that control replication stay turned off. In addition, selenium is required by T cells, and potentiates the action of interleukin-2. An AIDS patient is ten times more likely to die if s/he is selenium-deficient, according to Dr. Patrick. She uses the dose of 400 mcg per day. Vitamin E is known to play an important part in bolstering immunity and reducing inflammation. Like lipoic acid, vitamin E also inhibits NFkB, essential for viral replication. Dr. Patrick stressed that only the succinate form of vitamin E inhibits both the activation of NFkB and the binding of activated NFkB to DNA, as shown by the research of Dr. Lester Packer in the early nineties. Vitamin E has also been shown to enhance the action of AZT. Thus, the form of vitamin E known as alpha-tocopheryl-succinate (“dry E” in popular parlance) is of crucial importance for HIV patients. It is possible, however, that gamma-tocopherol, being a COX-2 inhibitor, is also of value. Vitamin A and beta carotene have been found helpful, as has zinc—but only in small doses. Zinc supplements in excess of 10 to 15 mg appear to increase disease progression. We don't know very much about zinc and HIV, but we do know that zinc is important for the immune system. Zinc activates the thymus hormone thymulin, which plays a part in the differentiation of T cells. Zinc is also involved in protease and integrase enzymes. It seems that supplementing with 12 mg of elemental zinc works best, according to Patrick. HIV infection has also been linked to deficiencies in B6, B12 and folate—the methylating factors. There is a “rampant deficiency” of B12 among AIDS patients, according to Dr. Patrick. Such nutritional deficiencies in patients with full-blown AIDS result mainly from their poor absorption of nutrients due to gut problems, Patrick explained. Thus doses need to be especially large. Most HIV patients are also glutamine-deficient, Patrick said. This is true of anyone under chronic severe stress, even though glutamine is abundant in any protein-rich diet (interestingly, the immune dysfunction seen in AIDS resembles the symptoms of protein-calorie malnutrition). Glutamine helps stop diarrhea and prevents muscle wasting. Large doses are needed (Patrick uses 40 g/day in four divided doses), but the cost is only $31 per week versus $1000 a week it would take for growth hormone treatment, another therapy aimed at preventing wasting. Patrick mentioned yet another supplement: acetyl-l-carnitine. AZT is a mitochondrial toxin. It turns out that the combination of acetyl-l-carnitine and lipoic acid can reverse this toxicity. After learning about the effectiveness of lipoic acid, NAC, Vitamin E, high-dose ascorbate and other supplements in fighting the HIV virus and improving the survival rate of AIDS patients, it was sad to hear that AIDS activists have largely lost interest in alternative therapies and are mostly waiting for the next “miracle drug.” So far, the drugs have proven highly toxic and not effective in many patients. We need to seriously consider the preventive and therapeutic use of supplements such as lipoic acid. In Dr. Jariwalla's words, “nutrients are compelling candidates for treatment of immune dysfunction underlying AIDS.” Much is to be gained from paying attention to the developments in the alternative treatment for AIDS. Cellular immunity decreases not only in the course of AIDS, but also during aging. It is of utmost importance that we learn how to sustain a healthy immune system that can fight viruses and bacteria. Thus, the results presented in the lectures on AIDS are of special interest for anti-aging medicine. Antioxidants, with special emphasis on lipoic acid and selenium, once again show their amazing potential.

Neurotransmitters

Abstract

A composition and method for treating Attention Deficit/Hyperactivity Disorder (ADHD) is provided which can be used both with and without ethical drugs now used to treat ADHD. The composition contains dimethylaminoethanol (DMAE), omega 3-fatty acids, betaine, oligomeric proanthocyanidins (OPC), folic acid, vitamins C, E, B₁₂, B₆, B₅ and beta-carotene and minerals (calcium, magnesium, zinc and selenium). Ethical drugs such as amphetamines, methylphenidate HCl and pemoline are known to control ADHD, but each has significant side effects when used in their therapeutic dose. When combining the composition with such ethical drugs, the amount of the ethical drug can be lowered below a level which causes undesirable side effects which is an important feature. Preferred compositions contain one or more of lecithin, choline, 5-hydroxytryptophan, tyrosine, Reishi Extract, Kava Extract, Gingko, Ginseng and St. John's Wort.

DESCRIPTION OF THE PREFERRED EMBODIMENT(S)

It is apparent that there is a need for the treatment of ADHD without the serious side effects of the aforementioned known drugs now used for treating ADHD. This invention provides a safe and efficacious combination of natural products which can be used with or without a reduced dosage of known ethical drugs used for ADHD. Dimethylaminoethanol (DMAE) is a natural chemical (found in fish) and has a p-acetamidobenzoate salt formerly prescribed for short attention span and hyperactivity. This drug is now available as an over-the-counter (OTC) nutrient supplement. Unlike most stimulant drugs, which tend to produce a short "up" cycle followed by a quick "come down", DMAE's effects are long lasting and more subtle. People who take DMAE report that after three or four weeks, they feel a mild stimulation continually, without side effects. The quintessential "nootropic" DMAE focuses on specific cortical brain functions associated with the direct intensification of consciousness. Side effects are very rare--high doses may result in insomnia, headache or tense muscles, which disappear if the dose is lowered. No serious adverse effects have been reported with DMAE. DMAE it is hypothesized accelerates the brain's synthesis and turnover of the neurotransmitter, acetylcholine, by redirecting choline synthesis to the cortex. Acetylcholine is the neurotransmitter that the brain uses for short term and long term memory and also helps in concentrating and focusing. Clinical studies including a double blind clinical study comparing DMAE and Ritalin, demonstrated significant test score improvements for both DMAE and Ritalin vs. placebo in ADHD children. DMAE has been shown to increase levels of choline in the brain due to DMAE's superior ability to cross the Blood-Brain Barrier. DMAE has been shown to elevate mood and allow a sounder sleep. DMAE has also been shown to decrease the accumulation of lipofuscin in the brain and to increase attention span and improved concentration. DMAE and derivatives thereof such as its p-acetamido benzoate salt and its bitartrate salt is an important component in the composition of this invention for treating Attention Deficit/Hyperactivity Disorder. Amounts of DMAE of up to 1000 mg, or more, preferably 200-800 mg are used. The brain consists of about 60% fat (lipids). In clinical studies with children with Attention Deficit/Hyperactivity Disorder, supplements of omega-3 fatty acids [eicosapentaenoic acid (EPA), and docosahexanoic acid (DHA)] vs. placebo, have demonstrated improved mood, enhanced clarity of thinking, more serenity and mental clarity of thinking, better concentration and better vision for those taking omega-3 fatty acids. Omega-3 fatty acids (e.g., EPA and DHA; fish oil) are an important component of the composition of the invention and are used in an amount of up to about 1200 mg or more, preferably 200-800 mg. Since the brain contains so much fat (lipids), it is hypothesized the brain has to be protected from free radicals forming "lipid peroxidation" which can cause brain disorders. Antioxidants such as vitamin C, E and A, preferably beta-carotene, improve memory performance and are included in the composition of the invention for this purpose. Vitamin C is used in an amount up to about 1500 mg or more, preferably 200-1000 mg; vitamin E up to about 800 IU or more, preferably 400 IU; and Vitamin A up to about 25,000 IU or more, preferably 10,000-25,000 IU. Recently, U.S. Pat. No. 5,719,178 claimed the use of proanthocyanidins (derived from the conifer bark), an antioxidant, in the treatment of APHD. The general class of oligomeric proanthocyanidins (OPC), which include conifer bark extract, grape seed extract, pine bark extract and the protective phenolic compounds from natural sources including bioflavonoids it is hypothesized can reduce free radical damage causing APHD and are included in the composition of the invention. These "free radical inhibitors" can pass through the Blood-Brain Barrier to protect the brain. OPCs have been shown to possess antihistamine, anti-inflammatory and immune-boosting effects as well as inhibiting the breakdown of the catecholamine neurotransmitters. OPCs increase attention span, increase focus and decrease emotional activity in ADHD persons and are used in the composition of the invention in an amount of about 200 mg or more, preferably 50-150 mg. Faulty neurotransmission is considered the main reason for ADHD. Acetylcholine is involved with learning and memory. Serotonin is involved with mood, emotional balance and impulse control. Catecholamines speed up the rate at which one neuron signals another. It is an important feature of this invention that there be a proper balance between the neurotransmitters for "normal" mental and emotional function. ADHD is a complex disorder involving an unbalance in several neurotransmitters. This invention uses a multi-step approach to fully treat ADHD disorder and the body according to this invention must have "methyl donors" to synthesize the brain chemicals, which accounts for their mood elevating and cognitive effects. Betaine or trimethylglycine, folic acid and vitamin B₁₂ are methyl donors, which are included in the composition of the invention. Betaine is used in an amount up to about 750 mg or more, preferably 100-500 mg. Folic acid is used in an amount up to 1.2 mg or more, preferably 0.4-1 mg and Vitamin B₁₂ up to about 40 mcg or more, preferably 3-30 mcg. In addition to the vitamins mentioned, the body uses vitamin B₅ to form acetylcholine and vitamin B₆ to form serotonin and L-Dopa into Dopamine, which accounts for their effect of increased alertness and mood. These vitamins are included in the composition of the invention. Vitamin B₅ is used up to about 250 mg or more, preferably 50-250 mg and Vitamin B₆ up to about 25 mg or more, preferably 5-25 mg. There are some vital minerals that affect the functioning of the brain. Calcium is a second messenger in neuronal membranes and it acts like a traffic signal for uptake and release of neurotransmitters. A "green light" from calcium permits release of a neurotransmitter into the synaptic intersection and a "red light" halts its passage into the receiving neuron. Calcium regulates the speed, intensity and clarity of every message that passes between brain cells. Magnesium is the second most important mineral in the brain. A study found low magnesium levels in 95% of ADHD children. Supplements of magnesium at a level of 6 mg/lb. of the child showed a decrease in hyperactivity. Zinc is the third most important mineral in the brain, where it acts like an antioxidant and also acts on the surface of the neurons as an electrical "contact" for neurotransmission. Selenium has been shown to protect the integrity of message sending between neurons by preventing free-radical attacks. One or more of these minerals, preferably all, are included in the composition of the invention in amounts up to about 150% of their RDA or more, preferably 100%. Calcium is preferably used at a level of 200 to 1200 mg, magnesium 100 to 500 mg, zinc 5 to 50 mg and selenium 40 to 120 mcg. 5-Hydroxytryptophan (5-HT), the precursor of serotonin, is also included in a preferred composition of the invention in an amount up to 75 mg or more, preferably 25-50 mg. Tyrosine, an amino acid, is a precursor of the catecholamines and used as a food supplement and improves alertness and elevated mood. Tyrosine is included in the composition of the invention in an amount up to 300 mg or more, preferably 50-250 mg. Like omega-3 fatty acids, phospholipids are important for optimal brain health, and are found in high concentrations in the brain. They help the brain cells communicate and influence how well the receptors function. Lecithin is a phospholipid found in certain foods and available as a food implement. Lecithin provides a very available source of choline required for acetylcholine. Lecithin and cytidine 5-diphosocholine (CDP) supplements increase alertness and motivation. Lecithin is used in an amount up to 2000 mg or more, preferably 600-1800 mg. Choline is also included in a preferred composition of the invention in an amount up to 800 mg or more, preferably 100-500 mg. Another important component of a preferred composition of the invention is Reishi extract derived from mushrooms. Reishi extract calms the mind, eases tension, improves memory and sharpens concentration and focus which are all important effects for treating Attention Deficit/Hyperactivity Disorder according to this invention. Reishi extract is used in an amount up to 2000 mg or more, preferably 500-1500 mg. Kava (Piper Methysticum) is a plant grown in the South Pacific and contains kavalactones, which influence a number of brain receptors involved with relaxation and mental clarity. In a study the results showed kava superior to placebo, with improvements in anxiety, mood, tension and fears with increased alertness. With the anxiety that is part of ADHD, kava extract is included in the composition to provide a calming effect and increase concentration. Kava is used in an amount up to 200 mg or more, preferably 50-150 mg. Gingko Biloba extract contains flavonoids and terpene lactones. Gingko improves communication between nerve cells and enhances blood flow to the brain. It also acts as a powerful antioxidant. Ginseng extract has been found to improve blood circulation and provide mental clarity. Researchers have evaluated the cognitive effects of gingko/ginseng. A double blind, placebo controlled study showed improvements in memory and overall cognitive function for those taking both gingko and ginseng and both are in preferred embodiments of the invention. Gingko is used in an amount up to 200 mg or more, preferably 30-120 mg and Ginseng up to about 200 mg or more, preferably 50-150 mg. The herb, St. John's Wort, affects five neurotransmitters in the brain: serotonin, noradrenaline, dopamine, gamma-aminobutyric acid (GABA) and interleukin-6. Because St. John's Wort affects these neurotransmitters, it helps balance them to provide "normality" and is a preferred component in the composition of the invention for treating ADHD in an amount up to about 800 mg or more, preferably 100-600 mg. In the combination of the aforementioned "natural" therapy, with ethical drugs, in addition to amphetamines, methylphenidate HCl, and pemoline, the composition of the invention can be used also with fluoxetine, sertraline, paroxetine, fluoxamine, citalopram, venlafaxine, bupropion, nefazodone and mirtazapien, among others. While the above components as described are the preferred components to be used in the composition of the invention it will be appreciated to those skilled in the art that known derivatives, e.g., salts, may be employed. As set forth hereinabove, it is an important feature of the invention that the components act together to provide a synergistic effect by effecting different pathways of action, i.e., by normalizing the several neurotransmitters and receptor sites responsible for ADHD. While the present invention has been particularly described, in conjunction with a specific preferred embodiment, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the foregoing description. It is therefore contemplated that the appended claims will embrace any such alternatives, modifications and variations as falling within the true scope and spirit of the present invention.

Glutamate "Blockers?"

Article that asks what things might be taken to block excess glutamates

Mike: Here's a practical question that's actually been burning in my head for about eight years: Is there anything that a person can take to block the absorption of MSG or glutamate as a defensive supplement?

Dr. Blaylock: Well, not necessarily to block it. You have other amino acids that can't compete for glutamic acid absorption. So that may be one way to help reduce the rate at which it would be absorbed.

Mike: Which aminos would those be?

Dr. Blaylock: Those would include leucine, isoleucine and lysine. They would compete for the same carrier system, so that would slow down absorption. There are a lot of things that act as glutamate blockers. You know, like silimarin, curcumin and ginkgo biloba. These things are known to directly block glutamate receptors and reduce excitotoxicity. Curcumin is very potent. Most of your flavonoids.

Magnesium is particularly important, because magnesium can block the MNDA glutamate type receptor. That's its natural function, so it significantly reduces toxicity. Vitamin E succinate is powerful at inhibiting excitotoxicity, as are all of your antioxidants. They found combinations of B vitamins also block excitotoxicity.