Why do some people’s hair and nails grow quicker than mine?
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Throughout recorded history, our hair and nails played an important role in signifying who we are and our social status. You could say, they separate the caveman from businessman.
It was no surprise then that many of us found a new level of appreciation for our hairdressers and nail artists during the COVID lockdowns. Even Taylor Swift reported she cut her own hair during lockdown.
So, what would happen if all this hair and nail grooming got too much for us and we decided to give it all up. Would our hair and nails just keep on growing?
The answer is yes. The hair on our head grows, on average, 1 centimeter per month, while our fingernails grow an average of just over 3 millimetres.
When left unchecked, our hair and nails can grow to impressive lengths. Aliia Nasyrova, known as the Ukrainian Rapunzel, holds the world record for the longest locks on a living woman, which measure an impressive 257.33 cm.
When it comes to record-breaking fingernails, Diana Armstrong from the United States holds that record at 1,306.58 cm.
Most of us, however, get regular haircuts and trim our nails – some with greater frequency than others. So why do some people’s hair and nails grow more quickly?
Remind me, what are they made out of?
Hair and nails are made mostly from keratin. Both grow from matrix cells below the skin and grow through different patterns of cell division.
Nails grow steadily from the matrix cells, which sit under the skin at the base of the nail. These cells divide, pushing the older cells forward. As they grow, the new cells slide along the nail bed – the flat area under the fingernail which looks pink because of its rich blood supply.
A hair also starts growing from the matrix cells, eventually forming the visible part of the hair – the shaft. The hair shaft grows from a root that sits under the skin and is wrapped in a sac known as the hair follicle.
This sac has a nerve supply (which is why it hurts to pull out a hair), oil-producing glands that lubricate the hair and a tiny muscle that makes your hair stand up when it’s cold.
At the follicle’s base is the hair bulb, which contains the all-important hair papilla that supplies blood to the follicle.
Matrix cells near the papilla divide to produce new hair cells, which then harden and form the hair shaft. As the new hair cells are made, the hair is pushed up above the skin and the hair grows.
But the papilla also plays an integral part in regulating hair growth cycles, as it sends signals to the stem cells to move to the base of the follicle and form a hair matrix. Matrix cells then get signals to divide and start a new growth phase.
Unlike nails, our hair grows in cycles
Scientists have identified four phases of hair growth, the:
- anagen or growth phase, which lasts between two and eight years
- catagen or transition phase, when growth slows down, lasting around two weeks
- telogen or resting phase, when there is no growth at all. This usually lasts two to three months
- exogen or shedding phase, when the hair falls out and is replaced by the new hair growing from the same follicle. This starts the process all over again.
Each follicle goes through this cycle 10–30 times in its lifespan.
If all of our hair follicles grew at the same rate and entered the same phases simultaneously, there would be times when we would all be bald. That doesn’t usually happen: at any given time, only one in ten hairs is in the resting phase.
While we lose about 100–150 hairs daily, the average person has 100,000 hairs on their head, so we barely notice this natural shedding.
So what affects the speed of growth?
Genetics is the most significant factor. While hair growth rates vary between individuals, they tend to be consistent among family members.
Nails are also influenced by genetics, as siblings, especially identical twins, tend to have similar nail growth rates.
But there are also other influences.
Age makes a difference to hair and nail growth, even in healthy people. Younger people generally have faster growth rates because of the slowing metabolism and cell division that comes with ageing.
Hormonal changes can have an impact. Pregnancy often accelerates hair and nail growth rates, while menopause and high levels of the stress hormone cortisol can slow growth rates.
Nutrition also changes hair and nail strength and growth rate. While hair and nails are made mostly of keratin, they also contain water, fats and various minerals. As hair and nails keep growing, these minerals need to be replaced.
That’s why a balanced diet that includes sufficient nutrients to support your hair and nails is essential for maintaining their health.
Nutrient deficiencies may contribute to hair loss and nail breakage by disrupting their growth cycle or weakening their structure. Iron and zinc deficiencies, for example, have both been linked to hair loss and brittle nails.
This may explain why thick hair and strong, well-groomed nails have long been associated with perception of good health and high status.
However, not all perceptions are true.
No, hair and nails don’t grow after death
A persistent myth that may relate to the legends of vampires is that hair and nails continue to grow after we die.
In reality, they only appear to do so. As the body dehydrates after death, the skin shrinks, making hair and nails seem longer.
Morticians are well aware of this phenomenon and some inject tissue filler into the deceased’s fingertips to minimise this effect.
So, it seems that living or dead, there is no escape from the never-ending task of caring for our hair and nails.
Michelle Moscova, Adjunct Associate Professor, Anatomy, UNSW Sydney
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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Sunflower Corn Burger
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Burgers are rarely a health food, but in this case, everything in the patty is healthy, and it’s packed with protein, fiber, and healthy fats.
You will need
- 1 can chickpeas
- ¾ cup frozen corn
- ½ cup chopped fresh parsley
- ⅓ cup sunflower seeds
- ⅓ cup cornichon pickles
- ⅓ cup wholegrain bread crumbs (gluten-free, if desired/required)
- ¼ bulb garlic (or more if you want a stronger flavor)
- 1 tbsp extra virgin olive oil, plus more for frying
- 1 tbsp nutritional yeast (or 1 tsp yeast extract)
- 2 tsp ground cumin
- 2 tsp red pepper flakes
- 2 tsp black pepper, coarse ground
- 1 tsp Dijon mustard
- To serve: 4 burger buns; these are not usually healthy, so making your own is best, but if you don’t have the means/time, then getting similarly shaped wholegrain bread buns works just fine.
- Optional: your preferred burger toppings, e.g. greenery, red onion, tomato slices, avocado, jalapeños, whatever does it for you
Note: there is no need to add salt; there is enough already in the pickles.
Method
(we suggest you read everything at least once before doing anything)
1) Combine all the ingredients except the buns (and any optional toppings) in a food processor, pulsing a few times for a coarse texture (not a purée).
2) Shape the mixture into 4 burger patties, and let them chill in the fridge for at least 30 minutes.
3) Heat a skillet over a medium-high heat with some olive oil, and fry the burgers on both sides until they develop a nice golden crust; this will probably take about 4 minutes per side.
4) Assemble in the buns with any toppings you want, and serve:
Enjoy!
Want to learn more?
For those interested in some of the science of what we have going on today:
- Sunflower Seeds vs Pumpkin Seeds – Which is Healthier? ← pumpkin seeds have more micronutrients; sunflower seeds have more healthy fats; feel free to use either or both in this recipe
- What Omega-3 Fatty Acids Really Do For Us
- Level-Up Your Fiber Intake! (Without Difficulty Or Discomfort)
- Making Friends With Your Gut (You Can Thank Us Later)
- Our Top 5 Spices: How Much Is Enough For Benefits?
Take care!
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Relationships: When To Stick It Out & When To Call It Quits
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Like A Ship Loves An Anchor?
Today’s article may seem a little bit of a downer to start with, but don’t worry, it picks up again too. Simply put, we’ve written before about many of the good parts of relationships, e.g:
Only One Kind Of Relationship Promotes Longevity This Much!
…but what if that’s not what we have?
Note: if you have a very happy, secure, fulfilling, joyous relationship, then, great! Or if you’re single and happy, then, also great! Hopefully you will still find today’s feature of use if you find yourself advising a friend or family member one day. So without further ado, let’s get to it…
You may be familiar with the “sunk cost fallacy”; if not: it’s what happens when a person or group has already invested into a given thing, such that even though the thing is not going at all the way they hoped, they now want to continue trying to make that thing work, lest their previous investment be lost. But the truth is: if it’s not going to work, then the initial investment is already lost, and pouring out extra won’t help—it’ll just lose more.
That “investment” in a given thing could be money, time, energy, or (often the case) a combination of the above.
In the field of romance, the “sunk cost fallacy” keeps a lot of bad relationships going for longer than perhaps they should, and looking back (perhaps after a short adjustment period), the newly-single person says “why did I let that go on?” and vows to not make the same mistake again.
But that prompts the question: how can we know when it’s right to “keep working on it, because relationships do involve work”, as perfectly reasonable relationship advice often goes, and when it’s right to call it quits?
Should I stay or should I go?
Some questions for you (or perhaps a friend you might find yourself advising) to consider:
- What qualities do you consider the most important for a partner to have—and does your partner have them?
- If you described the worst of your relationship to a close friend, would that friend feel bad for you?
- Do you miss your partner when they’re away, or are you glad of the break? When they return, are they still glad to see you?
- If you weren’t already in this relationship, would you seek to enter it now? (This takes away sunk cost and allows a more neutral assessment)
- Do you feel completely safe with your partner (emotionally as well as physically), or must you tread carefully to avoid conflict?
- If your partner decided tomorrow that they didn’t want to be with you anymore and left, would that be just a heartbreak, or an exciting beginning of a new chapter in your life?
- What things would you generally consider dealbreakers in a relationship—and has your partner done any of them?
The last one can be surprising, by the way. We often see or hear of other people’s adverse relationship situations and think “I would never allow…” yet when we are in a relationship and in love, there’s a good chance that we might indeed allow—or rather, excuse, overlook, and forgive.
And, patience and forgiveness certainly aren’t inherently bad traits to have—it’s just good to deploy them consciously, and not merely be a doormat.
Either way, reflect (or advise your friend/family member to reflect, as applicable) on the “score” from the above questions.
- If the score is good, then maybe it really is just a rough patch, and the tools we link at the top and bottom of this article might help.
- If the score is bad, the relationship is bad, and no amount of historic love or miles clocked up together will change that. Sometimes it’s not even anyone’s fault; sometimes a relationship just ran its course, and now it’s time to accept that and turn to a new chapter.
“At my age…”
As we get older, it’s easy for that sunk cost fallacy to loom large. Inertia is heavy, the mutual entanglement of lives is far-reaching, and we might not feel we have the same energy for dating that we did when we were younger.
And there may sometimes be a statistical argument for “sticking it out” at least for a while, depending on where we are in the relationship, per this study (with 165,039 participants aged 20–76), which found:
❝Results on mean levels indicated that relationship satisfaction decreased from age 20 to 40, reached a low point at age 40, then increased until age 65, and plateaued in late adulthood.
As regards the metric of relationship duration, relationship satisfaction decreased during the first 10 years of the relationship, reached a low point at 10 years, increased until 20 years, and then decreased again.❞
Source: Development of Relationship Satisfaction Across the Life Span: A Systematic Review and Meta-Analysis
And yet, when it comes to prospects for a new relationship…
- If our remaining life is growing shorter, then it’s definitely too short to spend in an unhappy relationship
- Maybe we really won’t find romance again… And maybe that’s ok, if w’re comfortable making our peace with that and finding joy in the rest of life (this widowed writer (hi, it’s me) plans to remain single now by preference, and her life is very full of purpose and beauty and joy and yes, even love—for family, friends, etc, plus the memory of my wonderful late beloved)
- Nevertheless, the simple fact is: many people do find what they go on to describe as their best relationship yet, late in life ← this study is with a small sample size, but in this case, even anecdotal evidence seems sufficient to make the claim reasonable; probably you personally know someone who has done so. If they can, so can you, if you so wish.
- Adding on to that last point… Later life relationships can also offer numerous significant advantages unique to such (albeit some different challenges too—but with the right person, those challenges are just a fun thing to tackle together). See for example:
An exploratory investigation into dating among later‐life women
And about those later-life relationships that do work? They look like this:
this one looks like the title says it all, but it really doesn’t, and it’s very much worth at least reading the abstract, if not the entire paper—because it talks a lot about the characteristics that make for happy or unhappy relationships, and the effect that those things have on people. It really is very good, and quite an easy read.
See again: Healthy Relationship, Healthy Life
Take care!
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The Well Plated Cookbook – by Erin Clarke
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Clarke’s focus here is on what she calls “stealthy healthy”, with the idea of dishes that feel indulgent while being great for the health.
The recipes, of which there are well over 100, are indeed delicious and easy to make without being oversimplified, and since she encourages the use of in-season ingredients, many recipes come with a “market swaps” substitution guide, to make each recipe seasonal.
The book is largely not vegetarian, let alone vegan, but the required substitutions will be second-nature to any seasoned vegetarian or vegan. Indeed, “skip the meat sometimes” is one of the advices she offers near the beginning of the book, in the category of tips to make things even healthier.
Bottom line: if you want to add dishes to your repertoire that are great for entertaining and still super-healthy, this book will be a fine addition to your collection.
Click here to check out The Well Plated Cookbook, and get cooking!
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Feta Cheese vs Mozzarella – Which is Healthier?
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Our Verdict
When comparing feta to mozzarella, we picked the mozzarella.
Why?
There are possible arguments for both, but there are a couple of factors that we think tip the balance.
In terms of macronutrients, feta has more fat, of which, more saturated fat, and more cholesterol. Meanwhile, mozzarella has about twice the protein, which is substantial for a cheese. So this section’s a fair win for mozzarella.
In the category of vitamins, however, feta wins with more of vitamins B1, B2, B3, B6, B9, B12, D, & E. In contrast, mozzarella boasts only a little more vitamin A and choline. An easy win for feta in this section.
When it comes to minerals, the matter is decided, we say. Mozzarella has more calcium, magnesium, phosphorus, and potassium, while feta has more copper, iron, and (which counts against it) sodium. A win for mozzarella.
About that sodium… A cup of mozzarella contains about 3% of the RDA of sodium, while a cup of feta contains about 120% of the RDA of sodium. You see the problem? So, while mozzarella was already winning based on adding up the previous categories, the sodium content alone is a reason to choose mozzarella for your salad rather than feta.
That settles it, but just before we close, we’ll mention that they do both have great gut-healthy properties, containing healthy probiotics.
In short: if it weren’t for the difference in sodium content, this would be a narrow win for mozzarella. As it is, however, it’s a clear win.
Want to learn more?
You might like to read:
- Making Friends With Your Gut (You Can Thank Us Later)
- Is Dairy Scary? ← the answer is “it can be, but it depends on the product, and some are healthy; the key is in knowing which”
- How Too Much Salt May Lead To Organ Failure
Take care!
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Treat Your Own Back – by Robin McKenzie
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A quick note about the author first: he’s a physiotherapist and not a doctor, but with over 40 years of practice to his name and 33 letters after his name (CNZM OBE FCSP (Hon) FNZSP (Hon) Dip MDT Dip MT), he seems to know his stuff. And certainly, if you visit any physiotherapist, they will probably have some of his books on their own shelves.
This book is intended for the layperson, and as such, explains everything that you need to know, in order to diagnose and treat your back. To this end, he includes assorted tests to perform, a lot of details about various possible back conditions, and then exercises to fix it, i.e. fix whatever you have now learned that the problem is, in your case (if indeed you didn’t know for sure already).
Of course, not everything can be treated by exercises, and he does point to what other things may be necessary in those cases, but for the majority, a significant improvement (if not outright symptom-free status) can be enjoyed by applying the techniques described in this book.
Bottom line: for most people, this book gives you the tools required to do exactly what the title says.
Click here to check out Treat Your Own Back, and treat your own back!
PS: if your issue is not with your back, we recommend you check out his other books in the series (neck, shoulder, hip, knee, ankle) 😎
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Starfruit vs Soursop – Which is Healthier?
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Our Verdict
When comparing starfruit to soursop, we picked the soursop.
Why?
First, by starfruit, we also mean carambola, which is a different name for the same fruit, and by soursop we also mean graviola/guyabano/guanábana, which are different namers for the same fruit. Now, as for their health qualities:
In terms of macros, the soursop has more carbs and fiber, the ratio of which also give it the lower glycemic index. So, a win for soursop here.
When it comes to vitamins, starfruit has more of vitamins A, B5, C, and E, while soursop has more of vitamins B1, B2, B3, B6, B7, B9, and K. Another win for soursop.
In the category of minerals, starfruit has slightly more copper, manganese, and zinc, while soursop has much more calcium, iron, magnesium, phosphorus, and potassium. One more win for soursop!
Adding up the sections makes for a clear and overwhelming win for soursop, but let’s address to quick safety considerations while we’re here:
- Soursop extract has been claimed to be an effective cancer treatment. It isn’t. There is no evidence for this at all; just one unscrupulous company that spread the claims.
- Soursop contains annonacin, a neurotoxin. That sounds scary, but much like with apple seeds and cyanide, the quantities you’d have to consume to suffer ill effects are absurd. Remember how capsaicin (as found in hot peppers) is also a neurotoxin, too and has many health benefits. Humans have a long and happy tradition of enjoying things that are toxic at high doses, but in small doses are neutral or even beneficial. Pretty much all things we can consume (including oxygen, and water) are toxic at sufficient doses.
In short, both of these fruits are fine and good, neither will treat cancer, but both will help to keep you in good health. As for nutritional density, the soursop wins in every category.
Want to learn more?
You might like to read:
Top 8 Fruits That Prevent & Kill Cancer ← soursop has no special cancer treatment properties, but actual evidence shows these fruits are beneficial (being good as a preventative, and also definitely a worthy adjunct to—but not a replacement for—mainstream anticancer therapies if you have cancer).
Take care!
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