The Alzheimer’s Gene That Varies By Race & Sex
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The Alzheimer’s Gene That Varies By Race & Sex
You probably know that there are important genetic factors that increase or decrease Alzheimer’s Risk. If you’d like a quick refresher before we carry on, here are two previous articles on this topic:
- Genetic Testing: Health Benefits & Methods (about personal genomics and health, including Alzheimer’s)
- The Surprising Link Between Type 2 Diabetes & Alzheimer’s (about the APOE-ε4 allele that is implicated in both)
A Tale of Two Alleles
It has generally been understood that APOE-ε2 lowers Alzheimer’s disease risk, and APOE-ε4 increases it.
However, for reasons beyond the scope of this article, research populations for genetic testing are overwhelmingly white. If you, dear reader, are white, you may be thinking “well, I’m white, so this isn’t a problem for me”, you might still want to read on…
An extensive new study, published days ago, by Dr. Belloy et al., looked at how these correlations held out per race and sex. They found:
- The “APOE-ε2 lowers; APOE-ε4 increases” dictum held out strongest for white people.
- In the case of Hispanic people, there was only a small correlation on the APOE-ε4 side of things, and none on the APOE-ε2 side of things per se.
- East Asians also saw no correlation with regard to APOE-ε2 per se.
- But! Hispanic and East Asian people had a reduced risk of Alzheimer’s if and only if they had both APOE-ε2 and APOE-ε4.
- Black people, meanwhile, saw a slight correlation with regard to the protective effect of APOE-ε2, and as for APOE-ε4, if they had any European ancestry, increased European ancestry meant a higher increased risk factor if they had APOE-ε4. African ancestry, on the other hand, had a protective effect, proportional to the overall amount of that ancestry.
And as for sex…
- Specifically for white people with the APOE-ε3/ε4 genotype, especially in the age range of 60–70, the genetic risk for Alzheimer’s was highest in women.
If you’d like to read more and examine the data for yourself:
APOE Genotype and Alzheimer Disease Risk Across Age, Sex, and Population Ancestry
Want to reduce your Alzheimer’s risk?
We have just the thing for you:
How To Reduce Your Alzheimer’s Risk: It’s Never Too Early To Do These 11 Things
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80-Year-Olds Share Their Biggest Regrets
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Notwithstanding the title, some of these people are a little younger than 80, but this adds to the interest a little as we see the different regrets / learned wisdoms at different stages of later life!
If we could turn back the time…
There are dozens of life regrets / wishes / retroactive advices shared in this video; here are some highlights:
- “My regret was I had a dysfunctional family and I wish I would have learned not to take responsibility.”
- “In my 30s, when I started drinking very heavily, I wish I hadn’t done that because it escalated to drug abuse.”
- “When my parents were old ages, I was working very hard… I didn’t have time to take care of them, not even spend the time with them. That’s my biggest regret.”
- “Live life to the fullest because none of us have any assurance on how old we’re going to be when we’re going to die.”
- “If I could do it over, I would have called home more and realized what my brother was going through.”
- “Spent a lot of years being concerned about what other people thought of me.”
- “You got to be careful what you say to your children because it means a lot.”
For the rest, enjoy:
Click Here If The Embedded Video Doesn’t Load Automatically!
Want to learn more?
You might also like to read:
- Managing Your Mortality Without Regrets
- How To Avoid Carer Burnout (Without Dropping Care)
- Managing Sibling Relationships In Adult Life
- Family Estrangment & How To Fix It
Take care!
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It’s On Me – by Dr. Sara Kuburic
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This isn’t about bootstrapping and nor is it a motivational pep talk. What it is, however, is a wake-up call for the wayward, and that doesn’t mean “disaffected youth” or such. Rather, therapist Dr. Sara Kuburic tackles the problem of self-loss.
It’s about when we get so caught up in what we need to do, should do, are expected to do, are in a rut of doing… That we forget to also live. After all, we only get one shot at life so far as we know, so we might as well live it in whatever way is right for us.
That probably doesn’t mean a life of going through the motions.
The writing style here is personal and direct, and it makes for quite compelling reading from start to finish.
Bottom line: if ever you find yourself errantly sleepwalking through life and would like to change that, this is a book for you.
Click here to check out It’s On Me, and take control of what’s yours!
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No Equipment Muscle Gain Routine for Ages 50+
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Sarcopenia, the loss of muscle mass commonly associated with aging, can be a big problem as it leaves us vulnerable to injury (and also isn’t great for the metabolism—keeping adequate muscle mass ensures keeping the metabolism ticking over nicely). Will Harlow, over-50s specialist physiotherapist, is here to share a routine that works without weights:
Where it counts
There’s a fair amount of emphasis here on the lower body and core. That’s because in practical terms, this is what matters more for our health than having bulging biceps:
- First exercise: donkey calf raises to build strength in the calves using a chair.
- Second exercise: single-leg elevated lunge to work the quads and glutes, using a step or books for elevation.
- Third exercise: slow sit-to-stand for quads, glutes, and core strength, focusing on a slow descent.
- Fourth exercise: wall press-up to strengthen the chest, shoulders, and arms, with a variation using towels for increased resistance.
- Final exercise: shoulder raises using bottles or similar weights to target the shoulders and rotator cuffs.
Ok, so that last one was a slight cheat on his part as it does require grabbing a weight, but it’s not specialist equipment at least, and can just be something you grabbed at home. It’s also the least important of the five exercises, and can be skipped if necessary.
For more on all of these plus visual demonstrations, enjoy:
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Want to learn more?
You might also like to read:
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Black Cohosh vs The Menopause
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Black Cohosh, By Any Other Name…
Black cohosh is a flowering plant whose extracts are popularly used to relieve menopausal (and postmenopausal) symptoms.
Note on terms: we’ll use “black cohosh” in this article, but if you see the botanical names in studies, the reason it sometimes appears as Actaea racemosa and sometimes as Cimicfuga racemosa, is because it got changed and changed back on account of some disagreements between botanists. It’s the same plant, in any case!
Read: Reclassification of Actaea to include Cimicifuga and Souliea (Ranunculaceae)
Does it work?
In few words: it works for physical symptoms, but not emotional ones, based on this large (n=2,310) meta-analysis of studies:
❝Black cohosh extracts were associated with significant improvements in overall menopausal symptoms (Hedges’ g = 0.575, 95% CI = 0.283 to 0.867, P < 0.001), as well as in hot flashes (Hedges’ g = 0.315, 95% CIs = 0.107 to 0.524, P = 0.003), and somatic symptoms (Hedges’ g = 0.418, 95% CI = 0.165 to 0.670, P = 0.001), compared with placebo.
However, black cohosh did not significantly improve anxiety (Hedges’ g = 0.194, 95% CI = -0.296 to 0.684, P = 0.438) or depressive symptoms (Hedges’ g = 0.406, 95% CI = -0.121 to 0.932, P = 0.131)❞
~ Dr. Ryochi Sadahiro et al., 2023
Source: Black cohosh extracts in women with menopausal symptoms: an updated pairwise meta-analysis
Here’s an even larger (n=43,759) one that found similarly, and also noted on safety:
❝Treatment with iCR/iCR+HP was well tolerated with few minor adverse events, with a frequency comparable to placebo. The clinical data did not reveal any evidence of hepatotoxicity.
Hormone levels remained unchanged and estrogen-sensitive tissues (e.g. breast, endometrium) were unaffected by iCR treatment.
As benefits clearly outweigh risks, iCR/iCR+HP should be recommended as an evidence-based treatment option for natural climacteric symptoms.
With its good safety profile in general and at estrogen-sensitive organs, iCR as a non-hormonal herbal therapy can also be used in patients with hormone-dependent diseases who suffer from iatrogenic climacteric symptoms.❞
~ Dr. Castelo-Branco et al., 2020
(iCR = isopropanolic Cimicifuga racemosa)
So, is this estrogenic or not?
This is the question many scientists were asking, about 20 or so years ago. There are many papers from around 2000–2005, but here’s a good one that’s quite representative:
❝These new data dispute the estrogenic theory and demonstrate that extracts of black cohosh do not bind to the estrogen receptor in vitro, up-regulate estrogen-dependent genes, or stimulate the growth of estrogen-dependent tumors❞
Source: Is Black Cohosh Estrogenic?
(the abstract is a little vague, but if you click on the PDF icon, you can read the full paper, which is a lot clearer and more detailed)
The short answer: no, black cohosh is not estrogenic
Is it safe?
As ever, check with your doctor as everyone’s situation can vary, but broadly speaking, yes, it has a very good safety profile—including for breast cancer patients, at that. See for example:
- Black cohosh efficacy and safety for menopausal symptoms: the Spanish Menopause Society statement
- Black cohosh (Cimicifuga racemosa): safety and efficacy for cancer patients
- The safety of black cohosh (Actaea racemosa, Cimicifuga racemosa)
Where can I get some?
We don’t sell it, but here for your convenience is an example product on Amazon
Enjoy!
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Why You Probably Need More Sleep
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Sleep: yes, you really do still need it!
We asked you how much sleep you usually get, and got the above-pictured, below-described set of responses:
- A little of a third of all respondents selected the option “< 7 hours”
- However, because respondents also selected options such as < 6 hours, < 5 hours, and < 4 hours, so if we include those in the tally, the actual total percentage of respondents who reported getting under 7 hours, is actually more like 62%, or just under two thirds of all respondents.
- Nine respondents, which was about 5% of the total, reported usually getting under 4 hours sleep
- A little over quarter of respondents reported usually getting between 7 and 8 hours sleep
- Fifteen respondents, which was a little under 10% of the total, reported usually getting between 8 and 9 hours of sleep
- Three respondents, which was a little under 2% of the total, reported getting over 9 hours of sleep
- In terms of the classic “you should get 7–9 hours sleep”, approximately a third of respondents reported getting this amount.
You need to get 7–9 hours sleep: True or False?
True! Unless you have a (rare!) mutated ADRB1 gene, which reduces that.
The way to know whether you have this, without genomic testing to know for sure, is: do you regularly get under 6.5 hours sleep, and yet continue to go through life bright-eyed and bushy-tailed? If so, you probably have that gene. If you experience daytime fatigue, brain fog, and restlessness, you probably don’t.
About that mutated ADRB1 gene:
NIH | Gene identified in people who need little sleep
Quality of sleep matters as much as duration, and a lot of studies use the “RU-Sated” framework, which assesses six key dimensions of sleep that have been consistently associated with better health outcomes. These are:
- regularity / usual hours
- satisfaction with sleep
- alertness during waking hours
- timing of sleep
- efficiency of sleep
- duration of sleep
But, that doesn’t mean that you can skimp on the last one if the others are in order. In fact, getting a good 7 hours sleep can reduce your risk of getting a cold by three or four times (compared with six or fewer hours):
Behaviorally Assessed Sleep and Susceptibility to the Common Cold
^This study was about the common cold, but you may be aware there are more serious respiratory viruses freely available, and you don’t want those, either.
Napping is good for the health: True or False?
True or False, depending on how you’re doing it!
If you’re trying to do it to sleep less in total (per polyphasic sleep scheduling), then no, this will not work in any sustainable fashion and will be ruinous to the health. We did a Mythbusting Friday special on specifically this, a while back:
Could Just Two Hours Sleep Per Day Be Enough?
PS: you might remember Betteridge’s Law of Headlines
If you’re doing it as a energy-boosting supplement to a reasonable night’s sleep, napping can indeed be beneficial to the health, and can give benefits such as:
However! There is still a right and a wrong way to go about it, and we wrote about this previously, for a Saturday Life Hacks edition of 10almonds:
How To Nap Like A Pro (No More “Sleep Hangovers”!)
As we get older, we need less sleep: True or False
False, with one small caveat.
The small caveat: children and adolescents need 9–12 hours sleep because, uncredited as it goes, they are doing some seriously impressive bodybuilding, and that is exhausting to the body. So, an adult (with a normal lifestyle, who is not a bodybuilder) will tend to need less sleep than a child/adolescent.
But, the statement “As we get older, we need less sleep” is generally taken to mean “People in the 65+ age bracket need less sleep than younger adults”, and this popular myth is based on anecdotal observational evidence: older people tend to sleep less (as our survey above shows! For any who aren’t aware, our readership is heavily weighted towards the 60+ demographic), and still continue functioning, after all.
Just because we survive something with a degree of resilience doesn’t mean it’s good for us.
In fact, there can be serious health risks from not getting enough sleep in later years, for example:
Sleep deficiency promotes Alzheimer’s disease development and progression
Want to get better sleep?
What gets measured, gets done. Sleep tracking apps can be a really good tool for getting one’s sleep on a healthier track. We compared and contrasted some popular ones:
The Head-To-Head Of Google and Apple’s Top Apps For Getting Your Head Down
Take good care of yourself!
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Thinking about trying physiotherapy for endometriosis pain? Here’s what to expect
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Endometriosis is a condition that affects women and girls. It occurs when tissue similar to the lining of the uterus ends up in other areas of the body. These areas include the ovaries, bladder, bowel and digestive tract.
Endometriosis will affect nearly one million Australian women and girls in their lifetime. Many high-profile Australians are affected by endometriosis including Bindi Irwin, Sophie Monk and former Yellow Wiggle, Emma Watkins.
Symptoms of endometriosis include intense pelvic, abdominal or low back pain (that is often worse during menstruation), bladder and bowel problems, pain during sex and infertility.
But women and girls wait an average of seven years to receive a diagnosis. Many are living with the burden of endometriosis and not receiving treatments that could improve their quality of life. This includes physiotherapy.
How is endometriosis treated?
No treatments cure endometriosis. Symptoms can be reduced by taking medications such as non-steriodal anti-inflammatories (ibuprofen, aspirin or naproxen) and hormonal medicines.
Surgery is sometimes used to diagnose endometriosis, remove endometrial lesions, reduce pain and improve fertility. But these lesions can grow back.
Whether they take medication or have surgery, many women and girls continue to experience pain and other symptoms.
Pelvic health physiotherapy is often recommended as a non-drug management technique to manage endometriosis pain, in consultation with a gynaecologist or general practitioner.
The goal of physiotherapy treatment depends on the symptoms but is usually to reduce and manage pain, improve ability to do activities, and ultimately improve quality of life.
What could you expect from your first appointment?
Physiotherapy management can differ based on the severity and location of symptoms. Prior to physical tests and treatments, your physiotherapist will comprehensively explain what is going to happen and seek your permission.
They will ask questions to better understand your case and specific needs. These will include your age, weight, height as well as the presence, location and intensity of symptoms.
You will also be asked about the history of your period pain, your first period, the length of your menstrual cycle, urinary and bowel symptoms, sexual function and details of any previous treatments and tests.
They may also assess your posture and movement to see how your muscles have changed because of the related symptoms.
They will press on your lower back and pelvic muscles to spot painful areas (trigger points) and muscle tightness.
If you consent to a vaginal examination, the physiotherapist will use one to two gloved fingers to assess the area inside and around your vagina. They will also test your ability to coordinate, contract and relax your pelvic muscles.
What type of treatments could you receive?
Depending on your symptoms, your physiotherapist may use the following treatments:
General education
Your physiotherapist will give your details about the disease, pelvic floor anatomy, the types of treatment and how these can improve pain and other symptoms. They might teach you about the changes to the brain and nerves as a result of being in long-term pain.
They will provide guidance to improve your ability to perform daily activities, including getting quality sleep.
If you experience pain during sex or difficulty using tampons, they may teach you how to use vaginal dilators to improve flexibility of those muscles.
Pelvic muscle exercises
Pelvic muscles often contract too hard as a result of pain. Pelvic floor exercises will help you contract and relax muscles appropriately and provide an awareness of how hard muscles are contracting.
This can be combined with machines that monitor muscle activity or vaginal pressure to provide detailed information on how the muscles are working.
Yoga, stretching and low-impact exercises
Yoga, stretching and low impact aerobic exercise can improve fitness, flexibility, pain and blood circulation. These have general pain-relieving properties and can be a great way to contract and relax bigger muscles affected by long-term endometriosis.
These exercises can help you regain function and control with a gradual progression to perform daily activities with reduced pain.
Hydrotherapy (physiotherapy in warm water)
Performing exercises in water improves blood circulation and muscle relaxation due to the pressure and warmth of the water. Hydrotherapy allows you to perform aerobic exercise with low impact, which will reduce pain while exercising.
However, while hydrotherapy shows positive results clinically, scientific studies to show its effectiveness studies are ongoing.
Manual therapy
Women frequently have small areas of muscle that are tight and painful (trigger points) inside and outside the vagina. Pain can be temporarily reduced by pressing, massaging or putting heat on the muscles.
Physiotherapists can teach patients how to do these techniques by themselves at home.
What does the evidence say?
Overall, patients report positive experiences pelvic health physiotherapists treatments. In a study of 42 women, 80% of those who received manual therapy had “much improved pain”.
In studies investigating yoga, one study showed pain was reduced in 28 patients by an average of 30 points on a 100-point pain scale. Another study showed yoga was beneficial for pain in all 15 patients.
But while some studies show this treatment is effective, a review concluded more studies were needed and the use of physiotherapy was “underestimated and underpublicised”.
What else do you need to know?
If you have or suspect you have endometriosis, consult your gynaecologist or GP. They may be able to suggest a pelvic health physiotherapist to help you manage your symptoms and improve quality of life.
As endometriosis is a chronic condition you may be entitled to five subsidised or free sessions per calendar year in clinics that accept Medicare.
If you go to a private pelvic health physiotherapist, you won’t need a referral from a gynaecologist or GP. Physiotherapy rebates can be available to those with private health insurance.
The Australian Physiotherapy Association has a Find a Physio section where you can search for women’s and pelvic physiotherapists. Endometriosis Australia also provides assistance and advice to women with Endometriosis.
Thanks to UTS Masters students Phoebe Walker and Kasey Collins, who are researching physiotherapy treatments for endometriosis, for their contribution to this article.
Peter Stubbs, Senior Lecturer in Physiotherapy, University of Technology Sydney and Caroline Wanderley Souto Ferreira, Visiting Professor of Physiotherapy, University of Technology Sydney
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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