Lowering and normalizing homocysteine levels is another key way to improve the health of your brain and manage your mental health.
In fact, keeping homocysteine levels within normal range is good for overall health in general.
But what exactly is homocysteine?
Homocysteine is an amino acid that is produced in the body as a by-product of methylation.
In healthy people, it’s properly metabolized and normal levels are maintained.
But when homocysteine isn’t properly metabolized, it can build up inside the body and levels can become too high.
And that’s when homocysteine becomes dangerous and unhealthy.
At high levels, homocysteine is inflammatory and neurotoxic, and increases oxidative stress and free radical damage in the brain by reducing levels of cysteine and glutathione (89-95, 138-139).
It’s also been shown to contribute to mitochondrial damage and reduce energy production in the brain (96-98).
Researchers have found that high levels of homocysteine disrupt the integrity of the blood-brain barrier, which allows substances that are normally kept out of the brain to cross over and contribute to neurological problems (99-102).
And studies have found that people with high levels of homocysteine have lower levels of serotonin and SAMe, a nutrient involved in the production of many neurotransmitters that improve mood (103-104).
Considering all this, it’s not too surprising that high levels of homocysteine have been linked to many chronic neurodegenerative and neuropsychiatric diseases, including:
Dementia, Alzheimer’s disease, cognitive impairment/dysfunction/decline (119-133, 143)
Headaches and migraines (112-118, 148)
Hearing loss (136-137)
Brain atrophy (134, 144, 151)
Parkinson’s disease (145)
Postpartum depression (135)
Postmenopausal mental decline (146)
Schizophrenia and other affective disorders (147, 153, 156)
Obsessive–compulsive disorder (157)
Multiple sclerosis (158-161)
People with nutritional deficiencies and MTHFR gene mutation are at an increased risk of high homocysteine levels. Homocysteine levels gradually increase as you age, and men are more likely than women to have high levels of homocysteine (140-142).
Thankfully, there are a number of ways to lower homocysteine.
Here are 16 ways to keep your homocysteine levels in check.
Several studies show that supplementing with trimethylglycine can significantly lower homocysteine levels (1-5).
One study found that the more trimethyglycine a person consumes, the lower their homocysteine levels (6).
According to the research, it appears that you need to supplement with at least three grams of trimethyglycine daily to significantly reduce homocysteine. Doing so will reduce homocysteine levels by 10% in persons with normal levels or by 20 to 40% in persons with elevated homocysteine levels (7-9).
However, even 500mg seems to lower homocysteine slightly (10).
The best way to lower homocysteine is by making sure you consume enough B vitamins on a regular basis.
Folate is one of the most important B vitamins because it helps metabolize homocysteine into methionine (51).
When your body doesn’t have enough folate, elevated levels of homocysteine are the result (52).
Good dietary sources of natural folate include leafy greens, asparagus, broccoli, cauliflower, strawberries, avocado, beef liver and poultry. These foods are included in my Free Grocery Shopping Guide for Optimal Brain Health.
However, folate-rich foods may not be enough to lower homocysteine. In fact, many people do not get enough folate from food because cooking and food processing destroy natural folates (57).
That’s why I recommend supplementation.
Supplementing with 800 mcg of folate has been shown to lower homocysteine by at least 28%. Even supplementing with just 113 mcg daily lowers homocysteine by about 15% (53-56, 58, 62).
If you decide to supplement with folate, avoid synthetic folic acid, which is commonly found in standard multivitamins. Instead, you should take a biologically active form of folate (methylfolate, or 5-MTHF).
5-MTHF is the most effective supplemental form of folate. Many people have genetic mutations in the enzyme that converts folic acid into methylfolate in the body. Therefore, folic acid is a waste and can actually cause harm if you have this genetic mutation.
Methylfolate supplements are almost seven times more effective than synthetic folic acid at increasing folate levels and lowering homocysteine levels. Regular synthetic folic acid has been shown to be quickly cleared from the central nervous system and poorly transported into the brain (59-61).
3. Vitamin B12
Vitamin B12 is another nutrient that plays a role in methylation. It's also a necessary cofactor in the metabolism of homocysteine (75-77).
Research shows that Vitamin B12 deficiency can contribute to rising homocysteine levels (78-80, 83-84).
But in those with elevated homocysteine, supplementing with 1,000 mcg of B12 per day can significantly lower and normalize blood levels of homocysteine (81-82).
Ordinary B12 supplements don’t always cut it though.
If you decide to supplement, you should avoid the semisynthetic version of B12 (cyanocobalamin) and take the methylated form (methyl-B12) instead, which is better absorbed and more biologically active.
Methyl-B12 is included in this supplement.
4. Vitamin B6
Vitamin B6 is another homocysteine-reducing nutrient that boosts mood, deepens sleep, and supports your entire nervous system.
It accomplishes this by playing a key role in the production of many neurotransmitters in your brain, including serotonin, GABA and dopamine.
Vitamin B6 is also a necessary cofactor in the metabolism of homocysteine, and having a deficiency can cause homocysteine levels to increase (14).
In fact, low blood levels of B6 are common, especially in people with higher homocysteine levels (15).
Thankfully, supplementation has been shown to help lower and normalize homocysteine levels (11-13).
However, it’s important to point out that it’s best to supplement B6 along with both folate and B12 if you want to dramatically lower homocysteine levels.
Supplementing with B6, B12 and folate has been shown to significantly lower homocysteine levels and reduce symptoms of depression (87).
One study found that within three weeks, homocysteine levels could be reduced by 17% using folate alone, 19% using B12 alone, 57% using folate and B12, and 60% using folate, B12 and B6 (86).
Another study found that combining B6 and folate reduces homocysteine 32% within five weeks (85).
That’s why I highly recommend supplementing with a high-quality B complex that contains all three B vitamins.
Taurine is an organic compound found in foods, particularly animal products. It has a wide variety of health benefits.
It’s also been shown to lower homocysteine.
Research shows that taurine supplementation significantly reduces plasma homocysteine levels (26-28).
Taurine is included in the Optimal Zinc supplement.
Creatine is also available in supplement form. Athletes, bodybuilders, wrestlers, sprinters often take creatine supplement to gain more muscle mass. It’s an incredibly well-researched supplement and safe to take regularly.
Supplementing with creatine can also support the brain. It's been shown to have neuroprotective effects and it rapidly produces energy to support brain cell function (29).
Research shows that creatine supplementation can also lower homocysteine in humans (32, 34).
Animal studies show the same (30-31, 33).
Creatine gives me energy, which is why I included it in Optimal Energy.
I take extra creatine when I’m lifting weights regularly.
Green coffee extract is a supplement that is derived from green coffee beans.
Green coffee beans are similar to regular coffee beans. However, they contain much more chlorogenic acid in them.
Chlorogenic acid is a phytochemical with cognitive health benefits.
One study found that 140 mg of chlorogenic acid, which is 28% of the content of green coffee extract, can significantly lower homocysteine (39).
8. Reduce Stress
I highly recommend you try to do something every day to manage your stress because psychological stress has been shown to significantly increase homocysteine levels (70-71).
My favourite ways to reduce stress include neurofeedback, meditation (using the Muse headband), massage, acupuncture, eye movement desensitization and reprocessing (EMDR), emotional freedom techniques (EFT), heart-rate variability (HRV) training, and this acupressure mat.
This anti-anxiety supplement also includes a number of natural compounds that have personally helped me manage my stress over the years.
And here is an article with 20 other ways to lower your stress hormone, cortisol.
Estrogen is the primary female sex hormone and responsible for the development and regulation of the female reproductive system.
Research shows that higher estrogen levels are associated with lower homocysteine levels, independent of nutritional status and muscle mass (72).
And individuals on estrogen replacement therapy have significantly lower homocysteine levels (72-73).
I recommend both men and women get their hormone levels checked regularly and optimize them because it can really improve your quality of life.
Choline is an essential B vitamin that most people don’t consume enough of, because very few foods in the Western diet contain it.
Research shows that high homocysteine levels can be lowered with choline (40-42).
One study found that increased intake of choline led to lower levels of circulating homocysteine (43).
And other studies have shown that choline deficiency in mice and humans is associated with increased homocysteine levels (44).
Citicoline (also known as CDP-Choline) is my favourite source of choline for the brain.
Another good source of choline for brain health is Alpha GPC.
Both Citicoline and Alpha GPC are included in the Optimal Brain supplement.
I’ve previously discussed how NAC can help treat six different mental illnesses.
And it turns out that it can also help lower homocysteine levels.
Research shows NAC supplementation can cause a “rapid and significant decrease” in homocysteine levels (49).
Studies have found that NAC can decrease homocysteine anywhere from 25 to 45 per cent (47-48, 50).
Researchers believe NAC displaces homocysteine from its protein carrier in the blood, which lowers homocysteine and promotes the formation of glutathione (45-46).
Is there anything omega-3 fatty acids can’t do?
And now it appears they can also lower homocysteine levels.
A randomized double-blind placebo-controlled clinical trial found that consuming three grams of omega-3 fatty acids daily for 2 months significantly decreases levels of homocysteine (63).
Other researchers have reported that omega-3s can lower homocysteine by 36 to 48% (64-65).
And studies have also found that people using B vitamins to lower homocysteine should also have enough omega-3s to improve brain function. In fact, some clinical trials using B vitamins to improve brain function show benefits only in people with higher omega-3 levels (143-144).
It’s important to eat enough omega-3s because they are essential fats that your body cannot produce itself.
Omega-3 fatty acids are found primarily in cold water fish such as salmon, black cod, sablefish, sardines and herring.
Unfortunately, most people don't consume enough omega-3 fatty acids through their diet.
That’s why I recommend people supplement with krill oil, a special kind of fish oil that contains omega-3s.
I take this krill oil supplement. I feel slightly depressed when I stop taking it. I actually notice the difference.
You can also order very high-quality seafood and krill oil supplements here.
And you can read more about the importance of omega-3 fatty acids here.
Research suggests that probiotics may also be able to lower homocysteine.
The researchers found that the probiotic increased the number of good bacteria in the gut, which then naturally increased Vitamin B12 and folate production in the gut. As a result, homocysteine levels dropped (66).
You can get the VSL#3 probiotic used in the above study here.
I personally created and take the Optimal Biotics supplement to support my brain and mental health.
And here are five other ways to increase the good bacteria in your gut.
14. Avoid Alcohol
It also increases homocysteine.
One study found that alcohol significantly reduces Vitamin B12 and folate levels and increased homocysteine levels (68).
And another study found that alcohol consumption increased homocysteine levels regardless of Vitamin B levels (69).
There are ways to protect your brain from alcohol, but you’re better off avoiding it completely or significantly reducing your consumption if you’re trying to heal. I personally don’t drink alcohol at all anymore.
If you do decide to drink it, this post explains that some types of alcohol are better than others.
15. Eat “Head to Tail”
Whole plant foods tend to be much healthier when they’re left whole, as they tend to have various nutrients that work together synergistically.
The same can be said about animal food.
Muscle meat (chicken breasts, lean beef) shouldn’t be your only source of animal protein. Our ancestors didn’t eat this way, so neither should we.
Your body prefers and expects to receive a balance of amino acids from different parts of whole animals.
That’s why I recommend “head-to-tail eating” – consuming a wide variety of proteins from the entire animal.
One of the main reasons I recommend this is because lean muscle meat is high in methionine.
Methionine is an essential amino acid, but too much methionine increases homocysteine levels and increases your need for Vitamin B6, B12, folate and choline (74, 88, 162).
But bone broth contains collagen, gelatin, and amino acids such as glycine and proline, which balance out the methionine in muscle meat, and helps your body better metabolize it.
Bone broth can be inconvenient to make all the time, so I drink this pre-made, organic chicken bone broth.
And if you’re actually interested in learning about how to cook and incorporate more whole animal proteins into your diet, I recommend checking out the book Odd Bits: How to Cook the Rest of the Animal by Jennifer McLagan.
16. Limit Medications and Compounds That Increase Homocysteine
A number of prescription drugs and natural compounds have been shown to increase homocysteine by interfering with folate absorption, or metabolism of homocysteine, including (35-38):
High levels of homocysteine can be problematic and increase your risk of many brain and mental health disorders.
But fortunately, you can do something about it!
Implementing the above 16 strategies can provide powerful protection against homocysteine’s negative effects and improve your quality life.
I’ve found great benefit in lowering my homocysteine levels, and I hope you experience the same.
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Medically reviewed by Dr. Fred Hui, MD, CCFP, CAFC