Well Well Well…

In Tuesday’s newsletter, we asked you for your (health-related) opinion on drinking water—with the understanding that this may vary from place to place. We got the above-depicted, below-described, set of responses:

• About 65% said “Filtered is best”
• About 20% said “From the mains is best”
• About 8% said “Bottled is best”
• About 3% said “Distilled is best”
• About 3% said “Some other source is best”

Of those who said “some other source is best”, one clarified that their preferred source was well water.

So what does the science say?

Fluoridated water is bad for you: True or False?

False, assuming a normal level of consumption. Rather than take up more space today though, we’ll link to what we previously wrote on this topic:

Q&A: Water Fluoridation

You may be wondering: but what if my level of consumption is higher than normal?

Let’s quickly look at some stats:

• The maximum permitted safety level varies from place to place, but is (for example) 2mg/l in the US, 1.5mg/l in Canada & the UK.
• The minimum recommended amount also varies from place to place, but is (for example) 0.7mg/l in Canada and the US, and 1mg/l in the UK.

It doesn’t take grabbing a calculator to realize that if you drink twice as much water as someone else, then depending on where you are, water fluoridated to the minimum may give you more than the recommended maximum.

However… Those safety margins are set so much lower than the actual toxicity levels of fluoride, that it doesn’t make a difference.

For example: your writer here takes a medication that has the side effect of causing dryness of the mouth, and consequently she drinks at least 3l of water per day in a climate that could not be described as hot (except perhaps for about 2 weeks of the year). She weighs 72kg (that’s about 158 pounds), and the toxicity of fluoride (for ill symptoms, not death) is 0.2mg/kg. So, she’d need 14.4mg of fluoride, which even if the water fluoridation here were 2mg/l (it’s not; it’s lower here, but let’s go with the highest figure to make a point), would require drinking more than 7l of water faster than the body can process it.

For more about the numbers, check out:

Acute Fluoride Poisoning from a Public Water System

Bottled water is the best: True or False?

False, if we consider “best” to be “healthiest”, which in turn we consider to be “most nutrients, with highest safety”.

Bottled water generally does have higher levels of minerals than most local mains supply water does. That’s good!

But you know what else is generally has? Microplastics and nanoplastics. That’s bad!

We don’t like to be alarmist in tone; it’s not what we’re about here, but the stats on bottled water are simply not good; see:

We Are Such Stuff As Bottles Are Made Of

You may be wondering: “but what about bottled water that comes in glass bottles?”

Indeed, water that comes in glass bottles can be expected to have lower levels of plastic than water that comes in plastic bottles, for obvious reasons.

However, we invite you to consider how likely you believe it to be that the water wasn’t stored in plastic while being processed, shipped and stored, before being portioned into its final store-ready glass bottles for end-consumer use.

Distilled water is the best: True or False?

False, generally, with caveats:

Distilled water is surely the safest water anywhere, because you know that you’ve removed any nasties.

However, it’s also devoid of nutrients, because you also removed any minerals it contained. Indeed, if you use a still, you’ll be accustomed to the build-up of these minerals (generally simplified and referenced as “limescale”, but it’s a whole collection of minerals).

Furthermore, that loss of nutrients can be more than just a “something good is missing”, because having removed certain ions, that water could now potentially strip minerals from your teeth. In practice, however, you’d probably have to swill it excessively to cause this damage.

Nevertheless, if you have the misfortune of living somewhere like Flint, Michigan, then a water still may be a fair necessity of life. In other places, it can simply be useful to have in case of emergency, of course.

Here’s an example product on Amazon if you’d like to invest in a water still for such cases.

PS: distilled water is also tasteless, and is generally considered bad, tastewise, for making tea and coffee. So we really don’t recommend distilling your water unless you have a good reason to do so.

Filtered water is the best: True or False?

True for most people in most places.

Let’s put it this way: it can’t logically be worse than whatever source of water you put into it…

Provided you change the filter regularly, of course.

Otherwise, after overusing a filter, at best it won’t be working, and at worst it’ll be adding in bacteria that have multiplied in the filter over however long you left it there.

You may be wondering: can water filters remove microplastics, and can they remove minerals?

The answer in both cases is: sometimes.

• For microplastics it depends on the filter size and the microplastic size (see our previous article for details on that).
• For minerals, it depends on the filter type. Check out:

The H₂O Chronicles | 5 Water Filters That Remove Minerals

One other thing to think about: while most water filtration jugs are made of PFAS-free BPA-free plastics for obvious reasons, for greater peace of mind, you might consider investing in a glass filtration jug, like this one ← this is just one example product on Amazon; by all means shop around and find one you like

Take care!

Age Limits On Exercise?

In Tuesday’s newsletter, we asked you your opinion on whether we should exercise less as we get older, and got the above-depicted, below-described, set of responses:

• About 42% said “No, we must keep pushing ourselves, to keep our youth“
• About 29% said “Only to the extent necessary due to chronic conditions etc”
• About 29% said “Yes, we should keep gently moving but otherwise take it easier”

One subscriber who voted for “No, we must keep pushing ourselves, to keep our youth“ wrote to add:

❝I’m 71 and I push myself. I’m not as fast or strong as I used to be but, I feel great when I push myself instead of going through the motions. I listen to my body!❞

~ 10almonds subscriber

One subscriber who voted for “Only to the extent necessary due to chronic conditions etc” wrote to add:

❝It’s never too late to get stronger. Important to keep your strength and balance. I am a Silver Sneakers instructor and I see first hand how helpful regular exercise is for seniors.❞

~ 10almonds subscriber

One subscriber who voted to say “Yes, we should keep gently moving but otherwise take it easier” wrote to add:

❝Keep moving but be considerate and respectful of your aging body. It’s a time to find balance in life and not put yourself into a positon to damage youself by competing with decades younger folks (unless you want to) – it will take much longer to bounce back.❞

~ 10almonds subscriber

These will be important, because we’ll come back to them at the end.

So what does the science say?

Endurance exercise is for young people only: True or False?

False! With proper training, age is no barrier to serious endurance exercise.

Here’s a study that looked at marathon-runners of various ages, and found that…

• the majority of middle-aged and elderly athletes have training histories of less than seven years of running
• there are virtually no relevant running time differences (p<0.01) per age in marathon finishers from 20 to 55 years
• after 55 years, running times did increase on average, but not consistently (i.e. there were still older runners with comparable times to the younger age bracket)

See: Performance, training and lifestyle parameters of marathon runners aged 20–80 years: results of the PACE-study

The researchers took this as evidence of aging being indeed a biological process that can be sped up or slowed down by various lifestyle factors.

See also:

Age & Aging: What Can (And Can’t) We Do About It?

this covers the many aspects of biological aging (it’s not one number, but many!) and how our various different biological ages are often not in sync with each other, and how we can optimize each of them that can be optimized

Resistance training is for young people only: True or False?

False! In fact, it’s not only possible for older people, but is also associated with a reduction in all-cause mortality.

Specifically, those who reported strength-training at least once per week enjoyed longer lives than those who did not.

You may be thinking “is this just the horse-riding thing again, where correlation is not causation and it’s just that healthier people (for other reasons) were able to do strength-training more, rather than the other way around?“

…which is a good think to think of, so well-spotted if you were thinking that!

But in this case no; the benefits remained when other things were controlled for:

❝Adjusted for demographic variables, health behaviors and health conditions, a statistically significant effect on mortality remained.

Although the effects on cardiac and cancer mortality were no longer statistically significant, the data still pointed to a benefit.

Importantly, after the physical activity level was controlled for, people who reported strength exercises appeared to see a greater mortality benefit than those who reported physical activity alone.❞

~ Dr. Jennifer Kraschnewski

See the study: Is strength training associated with mortality benefits? A 15 year cohort study of US older adults

And a pop-sci article about it: Strength training helps older adults live longer

Closing thoughts

As it happens… All three of the subscribers we quoted all had excellent points!

Because in this case it’s less a matter of “should”, and more a selection of options:

• We (most of us, at least) can gain/regain/maintain the kind of strength and fitness associated with much younger people, and we need not be afraid of exercising accordingly (assuming having worked up to such, not just going straight from couch to marathon, say).
• We must nevertheless be mindful of chronic conditions or even passing illnesses/injuries, but that goes for people of any age
• We also can’t argue against a “safety first” cautious approach to exercise. After all, sure, maybe we can run marathons at any age, but that doesn’t mean we have to. And sure, maybe we can train to lift heavy weights, but if we’re content to be able to carry the groceries or perhaps take our partner’s weight in the dance hall (or the bedroom!), then (if we’re also at least maintaining our bones and muscles at a healthy level) that’s good enough already.

Which prompts the question, what do you want to be able to do, now and years from now? What’s important to you?

For inspiration, check out: Train For The Event Of Your Life!

Take care!