How To Grow New Brain Cells (At Any Age)
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How To Grow New Brain Cells (At Any Age)
It was long believed that brain growth could not occur later in life, due to expending our innate stock of pluripotent stem cells. However, this was mostly based on rodent studies.
Rodent studies are often used for brain research, because it’s difficult to find human volunteers willing to have their brains sliced thinly (so that the cells can be viewed under a microscope) at the end of the study.
However, neurobiologist Dr. Maura Boldrini led a team that did a lot of research by means of autopsies on the hippocampi of (previously) healthy individuals ranging in age from 14 to 79.
What she found is that while indeed the younger subjects did predictably have more young brain cells (neural progenitors and immature neurons), even the oldest subject, at the age of 79, had been producing new brain cells up until death.
Read her landmark study: Human Hippocampal Neurogenesis Persists throughout Aging
There was briefly a flurry of news articles about a study by Dr. Shawn Sorrels that refuted this, however, it later came to light that Dr. Sorrels had accidentally destroyed his own evidence during the cell-fixing process—these things happen; it’s just unfortunate the mistake was not picked up until after publication.
A later study by a Dr. Elena Moreno-Jiménez fixed this flaw by using a shorter fixation time for the cell samples they wanted to look at, and found that there were tens of thousands of newly-made brain cells in samples from adults ranging from 43 to 87.
Now, there was still a difference: the samples from the youngest adult had 30% more newly-made braincells than the 87-year-old, but given that previous science thought brain cell generation stopped in childhood, the fact that an 87-year-old was generating new brain cells 30% less quickly than a 43-year-old is hardly much of a criticism!
As an aside: samples from patients with Alzheimer’s also had a 30% reduction in new braincell generation, compared to samples from patients of the same age without Alzheimer’s. But again… Even patients with Alzheimer’s were still growing some new brain cells.
Read it for yourself: Adult hippocampal neurogenesis is abundant in neurologically healthy subjects and drops sharply in patients with Alzheimer’s disease
Practical advice based on this information
Since we can do neurogenesis at any age, but the rate does drop with age (and drops sharply in the case of Alzheimer’s disease), we need to:
Feed your brain. The brain is the most calorie-consuming organ we have, by far, and it’s also made mostly of fat* and water. So, get plenty of healthy fats, and get plenty of water.
*Fun fact: while depictions in fiction (and/or chemically preserved brains) may lead many to believe the brain has a rubbery consistency, the untreated brain being made of mostly fat and water gives it more of a blancmange-like consistency in reality. That thing is delicate and spatters easily. There’s a reason it’s kept cushioned inside the strongest structure of our body, far more protected than anything in our torso.
Exercise. Specifically, exercise that gets your blood pumping. This (as our earlier-featured video today referenced) is one of the biggest things we can do to boost Brain-Derived Neurotrophic Factor, or BDNF.
Here be science: Brain-Derived Neurotrophic Factor, Depression, and Physical Activity: Making the Neuroplastic Connection
However, that’s not the only way to increase BDNF; another is to enjoy a diet rich in polyphenols. These can be found in, for example, berries, tea, coffee, and chocolate. Technically those last two are also botanically berries, but given how we usually consume them, and given how rich they are in polyphenols, they merit a special mention.
See for example: Effects of nutritional interventions on BDNF concentrations in humans: a systematic review
Some supplements can help neuron (re)growth too, so if you haven’t already, you might want to check out our previous main feature on lion’s mane mushroom, a supplement which does exactly that.
For those who like videos, you may also enjoy this TED talk by neuroscientist Dr. Sandrine Thuret:
Prefer text? Click here to read the transcript
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The Better Brain – by Dr. Bonnie Kaplan and Dr. Julia Rucklidge
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We’ve reviewed books about eating for brain health before, but this is the first time we’ve reviewed one written by clinical psychologists.
What does that change? Well, it means it less focus on, say, reducing beta amyloid plaques, and more on mental health—which often has a more immediate impact in our life.
In the category of criticisms, the authors do seem to have a bit of a double-standard. For example, they criticise psychiatrists prescribing drugs that have only undergone 12-week clinical trials, but they cite a single case-study of a 10-year-old boy as evidence for a multivitamin treating his psychosis when antipsychotics didn’t work.
However, the authors’ actual dietary advice is nonetheless very respectable. Whole foods, nutrients taken in synergistic stacks, cut the sugar, etc.
Bottom line: if you’d like to learn about the impact good nutrition can have on the brain’s health, ranging from diet itself to dietary supplements, this book presents many avenues to explore.
Click here to check out “The Better Brain”, and eat for the good health of yours!
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What you need to know about the new weight loss drug Zepbound
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In a recent poll, KFF found that nearly half of U.S. adults were interested in taking a weight management drug like the increasingly popular Ozempic, Wegovy, and Mounjaro.
“I can understand why there would be widespread interest in these medications,” says Dr. Alyssa Lampe Dominguez, an endocrinologist and clinical assistant professor at the University of Southern California. “Obesity is a chronic disease that is very difficult to treat. And a lot of the medications that we previously used weren’t as effective.”
Now, there’s a new option available: In November 2023, the FDA approved Zepbound, another weight management medication, developed by the pharmaceutical company Eli Lilly. Zepbound is different from other drugs in many ways, including the fact that it’s proven to be the most effective option so far.
Keep reading to find out more about Zepbound, including who can take it, its side effects, and more.
What is Zepbound?
Zepbound, one of the brand names for tirzepatide, is an injectable drug with a maximum dosage of 15 mg per week. It’s based on incretin, a hormone that’s naturally released in the gut after a meal. (Mounjaro is another brand name for tirzepatide.)
Tirzepatide is considered a dual agonist because it activates the two primary incretin hormones: the glucagon-like peptide-1 (GLP-1) and gastric inhibitory peptide (GIP) hormones.
According to Dr. Katherine H. Saunders, an obesity medicine physician at Weill Cornell Medicine and co-founder of Intellihealth, tirzepatide is involved with several processes that regulate blood sugar, slow the removal of food from the stomach, and affect brain areas involved in appetite.
This means that people taking the medication feel less hungry and get fuller faster, leading to less food intake and, ultimately, weight loss.
How is Zepbound different from Ozempic?
The medications are different in many ways. Ozempic and Wegovy, which are both brand names for semaglutide, only target the GLP-1 hormone. Studies have shown that Zepbound can lead to a higher percentage of total body weight loss than semaglutide medications. In addition to being more effective, there is some evidence that Zepbound is overall more tolerable than Ozempic or Wegovy.
“I have seen overall lower rates in severity of side effects with the tirzepatide medications. Mounjaro [tirzepatide] in particular is the one that I’ve used up until this point, but there’s a thought that the GIP component of the medication actually decreases nausea,” adds Lampe Dominguez. “Anecdotally, patients that I have switched from semaglutide or Ozempic to Mounjaro say that they have less side effects with Mounjaro.”
How is Zepbound different from Mounjaro?
Zepbound and Mounjaro are the same medication—tirzepatide—but they’re approved for different conditions. Zepbound is FDA-approved for weight loss, while Mounjaro is approved for type 2 diabetes. (However, Mounjaro is also at times prescribed off-label for weight loss.)
What are some of Zepbound’s side effects?
According to the FDA, side effects include nausea, vomiting, diarrhea, constipation, stomach discomfort and pain, fatigue, and burping. See a more comprehensive list of side effects here.
Who can take Zepbound?
Zepbound is FDA-approved for adults with obesity (a BMI of 30 or greater) or who have a BMI of 27 or greater with at least one weight-related condition, like high blood pressure, type 2 diabetes, or high cholesterol.
“I tend to advise patients who don’t meet those criteria to not take these medications because we really don’t know what the risks are,” says Lampe Dominguez, adding that people with lower BMI weren’t included in the medication’s studies. “We don’t know if there are specific risks to using this medication at a lower body mass index [or] if there might be some negative outcomes.”
Both doctors agree that it’s important for people who are interested in starting any weight loss medication to talk to their doctors about the potential risks and benefits. For instance, the FDA notes that Zepbound has caused thyroid tumors in rats, and while it’s unknown if this could also happen to humans, the agency said the medication shouldn’t be used in patients with a personal or family history of medullary thyroid cancer.
“Zepbound is a powerful medication that can lead to severe side effects, vitamin deficiencies, a complete lack of appetite, or too much weight loss if prescribed without the appropriate personalization, education, and close monitoring,” says Saunders.
“With all of these medications, and particularly with Zepbound, we would want to make sure that [patients] don’t have a family history of a specific type of thyroid cancer called medullary thyroid cancer,” says Lampe Dominguez.
How long should people take Zepbound for?
“Anti-obesity medications like Zepbound are not meant for short-term weight loss, but long-term treatment of obesity, which is a chronic disease,” explains Saunders. “We prepare our patients to be on the medication (or some type of medical obesity treatment) long term for their chronic disease, which is only controlled for the duration of time they’re being treated.”
For more information, talk to your health care provider.
This article first appeared on Public Good News and is republished here under a Creative Commons license.
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The Power Foods Diet – by Dr. Neal Barnard
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First, what this is not: it’s not a cookbook. There are recipes, more than a hundred if we consider such things as “barbecue sauce” as a standalone recipe, and if we overlook such things as how “perfect hot oatmeal” is followed on the next page by a recipe for “perfect hot oatmeal with berries”.
However, as we say, it’s not a cookbook; it’s first and foremost an educational text on the topic of nutrition.
Here we will learn about good eating for general health, which foods are natural appetite-suppressants, which foods reduce our body’s absorption of sugars from foods (not merely slowing, but flushing them away so they cannot be absorbed at all), and which foods actually boost metabolism for a few hours after the meal.
Dr. Barnard also talks about some foods that are more healthy, or less healthy, than popularly believed, and how to use all this information to craft a good, optimized, dietary plan for you.
Bottom line: there’s a lot of good information here, and the recipes are simply a bonus.
Click here to check out The Power Foods Diet, and optimize yours!
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If I’m diagnosed with one cancer, am I likely to get another?
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Receiving a cancer diagnosis is life-changing and can cause a range of concerns about ongoing health.
Fear of cancer returning is one of the top health concerns. And managing this fear is an important part of cancer treatment.
But how likely is it to get cancer for a second time?
Why can cancer return?
While initial cancer treatment may seem successful, sometimes a few cancer cells remain dormant. Over time, these cancer cells can grow again and may start to cause symptoms.
This is known as cancer recurrence: when a cancer returns after a period of remission. This period could be days, months or even years. The new cancer is the same type as the original cancer, but can sometimes grow in a new location through a process called metastasis.
Actor Hugh Jackman has gone public about his multiple diagnoses of basal cell carcinoma (a type of skin cancer) over the past decade.
The exact reason why cancer returns differs depending on the cancer type and the treatment received. Research is ongoing to identify genes associated with cancers returning. This may eventually allow doctors to tailor treatments for high-risk people.
What are the chances of cancer returning?
The risk of cancer returning differs between cancers, and between sub-types of the same cancer.
New screening and treatment options have seen reductions in recurrence rates for many types of cancer. For example, between 2004 and 2019, the risk of colon cancer recurring dropped by 31-68%. It is important to remember that only someone’s treatment team can assess an individual’s personal risk of cancer returning.
For most types of cancer, the highest risk of cancer returning is within the first three years after entering remission. This is because any leftover cancer cells not killed by treatment are likely to start growing again sooner rather than later. Three years after entering remission, recurrence rates for most cancers decrease, meaning that every day that passes lowers the risk of the cancer returning.
Every day that passes also increases the numbers of new discoveries, and cancer drugs being developed.
What about second, unrelated cancers?
Earlier this year, we learned Sarah Ferguson, Duchess of York, had been diagnosed with malignant melanoma (a type of skin cancer) shortly after being treated for breast cancer.
Although details have not been confirmed, this is likely a new cancer that isn’t a recurrence or metastasis of the first one.
Australian research from Queensland and Tasmania shows adults who have had cancer have around a 6-36% higher risk of developing a second primary cancer compared to the risk of cancer in the general population.
Who’s at risk of another, unrelated cancer?
With improvements in cancer diagnosis and treatment, people diagnosed with cancer are living longer than ever. This means they need to consider their long-term health, including their risk of developing another unrelated cancer.
Reasons for such cancers include different types of cancers sharing the same kind of lifestyle, environmental and genetic risk factors.
The increased risk is also likely partly due to the effects that some cancer treatments and imaging procedures have on the body. However, this increased risk is relatively small when compared with the (sometimes lifesaving) benefits of these treatment and procedures.
While a 6-36% greater chance of getting a second, unrelated cancer may seem large, only around 10-12% of participants developed a second cancer in the Australian studies we mentioned. Both had a median follow-up time of around five years.
Similarly, in a large US study only about one in 12 adult cancer patients developed a second type of cancer in the follow-up period (an average of seven years).
The kind of first cancer you had also affects your risk of a second, unrelated cancer, as well as the type of second cancer you are at risk of. For example, in the two Australian studies we mentioned, the risk of a second cancer was greater for people with an initial diagnosis of head and neck cancer, or a haematological (blood) cancer.
People diagnosed with cancer as a child, adolescent or young adult also have a greater risk of a second, unrelated cancer.
What can I do to lower my risk?
Regular follow-up examinations can give peace of mind, and ensure any subsequent cancer is caught early, when there’s the best chance of successful treatment.
Maintenance therapy may be used to reduce the risk of some types of cancer returning. However, despite ongoing research, there are no specific treatments against cancer recurrence or developing a second, unrelated cancer.
But there are things you can do to help lower your general risk of cancer – not smoking, being physically active, eating well, maintaining a healthy body weight, limiting alcohol intake and being sun safe. These all reduce the chance of cancer returning and getting a second cancer.
Sarah Diepstraten, Senior Research Officer, Blood Cells and Blood Cancer Division, Walter and Eliza Hall Institute and Terry Boyle, Senior Lecturer in Cancer Epidemiology, University of South Australia
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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From Cucumbers To Kindles
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You’ve Got Questions? We’ve Got Answers!
Q: Where do I get cucumber extract?
A: You can buy it from BulkSupplements.com (who, despite their name, start at 100g packs)
Alternatively: you want it as a topical ointment (for skin health) rather than as a dietary supplement (for bone and joint health), you can extract it yourself! No, it’s not “just juice cucumbers”, but it’s also not too tricky.
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Eat to Your Heart’s Content – by Dr. Sat Bains
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Making food heart-healthy and tasty is a challenge that vexes many, but it doesn’t have to be so difficult.
Dr. Sat Bains, a professional chef with multiple Michelin stars to his name, is an expert on “tasty”, and after surviving a heart attack himself, he’s become an expert on “heart-healthy” since then.
The book contains not only the recipes (of which there are 68, by the way), but also large sections of explanation of what makes various ingredients or methods heart-healthy or heart-unhealthy.
There’s science in there too, and these sections were written under the guidance of Dr. Neil Williams, a lecturer in physiology and nutrition.
You may be wondering as to why the author himself has a doctorate too; in fact he has three, none of which are relevant:
- Doctor of Arts
- Doctor of Laws
- Doctor of Hospitality (Honorary)
…but we prefix “Dr.” when people are that and he is that. The expertise we’re getting here though is really his culinary skill and extracurricular heart-healthy learning, plus Dr. Williams’ actual professional health guidance.
Bottom line: if you’d like heart-healthy recipes with restaurant-level glamour, this book is a fine choice.
Click here to check out Eat To Your Heart’s Content, and look after yours!
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