Marks Daily Apple
Serving up health and fitness insights (daily, of course) with a side of irreverence.
14 Nov

Dear Mark: Matcha Tea, Runner’s High, Stress and Weight Gain, and Fasting for Teens

Yesterday was the Malibu Marathon (and Half Marathon), and yeah, I snuck a peek. I could never do it myself, not ever again, but I always like to take a gander at the hordes of faithful. Tons of folks in Fivefingers (and even a few totally barefoot runners), about half of whom were either still heel striking, running with a total disregard for midline stabilization, or bobbing their heads up and down like pigeons trolling for scraps of bread. At that point, their heads are in the right place but they’re doing even more damage to themselves. Barefoot running isn’t a panacea. In fact, it opens you up to even more injury if you persist with the same shoe-centric running form you used before. Oh well. They’ll learn. I just hope the lesson takes before any serious damage is done.

This week, we’ve got questions on whether IF is safe for teens, whether the runner’s high is worth pursuing, whether stress can lead to weight gain, and whether matcha green tea matches up to the hype (see what I did there?). Let’s go.

Hi Mark,

I recently discovered “matcha” tea; a green tea concentrate. What do you think?



Most people would agree that green tea is pretty dang good for you. My wife, Carrie, is a huge tea drinker. I like a cup or two every few days myself, when it occurs to me to brew it or if there’s any left over. Though I’m no connoisseur, I tend to go for the grassier varieties. But what about matcha?

Matcha green tea is made from powdered, shade-grown tea leaves. Well, “shade-finished” might be a more accurate descriptor; a few weeks before the harvest, matcha-designated tea plants are covered with shade. This slows the growth, sweetens and deepens the flavor, and increases the amino acid content of the leaves (specifically L-theanine). Pulverizing the tea leaves into a powder increases the surface area and makes for a stronger, more potent brew. Plus, when you drink matcha, you’re consuming the leaves and all their polyphenols and amino acids themselves. The powder doesn’t get strained out like normal green tea leaves.

This seems to increase the antioxidant activity. First, there’s more L-theanine available. I’ve discussed the stress-reducing benefits of L-theanine before. All good there. Plus, a 2003 study found that the epigallocatechin gallate (EGCG) was 137 times more bioavailable in matcha than a traditional leaf-based green tea, and more than three times as bioavailable as the “largest literature value of other green teas.” ECGC is the premier antioxidant on which everyone who raves about green tea focuses. There are EGCG pills, tinctures, and all sorts of supplements.

More EGCG, more L-theanine? Sounds good to me.


I read an article on your site about how in many aspects, sprinting and very low heart rate cardio are better than constant long distance running. But what about the mental effects of long distance running? The “high” I get after a long, steady run is so much better than the “high” I get from sprinting. What would you say to this? Thanks so much and I understand if you don’t have the time to reply!


If you’re going to run long distance, your way is the way to do it. Rather than chasing the numbers, you are enjoying the journey. I can’t really find fault with that. If I’d taken that approach, I’d probably still have suffered the negative health effects of chronic cardio, but at least it wouldn’t have felt like such a chore doing it.

As for the runner’s high itself, we’re still figuring out exactly what causes it. Both endorphins (a sort of natural opiate) and anandamide (an inhouse cannabinoid that binds to the same receptors as THC from cannabis) are prime candidates, but whichever neurotransmitter is responsible, they kick into gear when the going gets really tough and when exertion and the physical stress from running at a high intensity for long periods of time are elevated. And yeah, it feels good. I still remember it. It makes those long runs tolerable, possible.

You know what else made those runs tolerable? Cushy shoes, half gallons of ice cream, and buckets of pasta. With the latest running shoes, I could run 20 miles without my feet noticing. Barefoot or in VFF, my foot muscles let me know to either slow down or stop. Without pasta and ice cream, I don’t think I could have maintained my training. Does that mean those are health foods?

I’m not sure if we can equate the runner’s high to all those things, but there are similarities. Occasionally dipping into one’s natural narcotic stash by way of long distance cardio is fine, and even advisable (that’s what it’s there for, after all), but not every day. This is probably an evolution-selected survival mechanism. It’s a tool used by the body to make an otherwise horrible, stressful, calorically-costly experience seem not so bad. Imagine you are being hunted down by a beast or invading tribe over a period of hours. Rather than just giving up deer-in-the-headlights style (and forever losing the opportunity to forward your genes into the next generation), you can maintain a positive, feel-good attitude while continuing your escape (or maybe not giving up on a long hunt). At least that’s how I picture it. But I’d be wary of using it three or four or five days a week. It IS addictive. Take it from someone who chased that high daily and suffered the costs.


Is it normal to gain weight in the Fall? This happens to me every year and I have ballooned up to my pre-Primal measurements (about 6 inches gained back). I’m lifting heavier and stronger than ever before (I love lifting heavy now) and I still sprint and move frequently at a slow pace. I have unfortunately been indulging more than I did over the summer when I went Primal and I know a lot of that is due to stress. I am a junior in college and living in my first apartment. Is stress partly to blame for gaining back some of the fat? Would attempting to lose the weight now as opposed to when the school year ends add too much stress to my already stressful schedule? Thanks for all you do!


You gotta get a handle on the stress before anything else. The stress isn’t making you gain weight, not directly. The “indulging more” is. However, chronically elevated cortisol levels (a normal characteristic of the highly and perpetually stressed individual) induce insulin resistance, poor carb tolerance, increase hunger, and increase belly fat relative to other areas of the body. So, ultimately, the stress is leading to poor glucose tolerance and more hunger, which leads to more indulging and a reduced ability to handle the food (especially carbs), which leads to weight gain. Gaining more weight can further increase stress, simply because it’s a frustrating thing to experience. It can feed on itself and lead to even more weight and more stress.

I’d actually caution against actively attempting to lose weight without addressing the stress. Studies consistently show that dieting increases cortisol levels, which in turn increases hunger and indicates a general increase in your stress levels. For you, right now, stress may be ultimate cause of your weight gain, so you have to figure it out. Explore meditation. Go for walks. Don’t procrastinate. Be nutrient replete. Get good sleep. Power down from electronic usage before bed. Check out my previous guides on beating stress, like this one and this one.

Do you think intermittent fasting would be safe for teenagers? Animal studies have shown there is no stunting, but what do you think?


If you look at animals, parents always go out of their way to make sure their young get a steady intake of calories. In the pet realm, puppies and kittens need more food for their size than do adult dogs to ensure proper growth. I don’t see why this would be different for people. Humans mature much more slowly than other animals, so a steady caloric intake is probably required for far longer. My son, a teen, eats like a horse. His appetite is insatiable, and I can’t imagine IF going well for him. If he went with a reduced eating window, he’d have to eat 2000+ calories at each sitting. Possible? For him, yeah, but not very realistic in the long haul.

That said, if you can account for nutrient density, caloric intake, and handle the logistics of it all, I don’t see why skipping the occasional meal would be harmful to a healthy teen. I just find it pretty unnecessary. There are many benefits to fasting, but maybe save them for later.

Thanks for reading, everyone. If you’ve got any more questions, send ’em in. If I went wrong somewhere, somehow, let me know in the comment section. Take care!

You want comments? We got comments:

Imagine you’re George Clooney. Take a moment to admire your grooming and wit. Okay, now imagine someone walks up to you and asks, “What’s your name?” You say, “I’m George Clooney.” Or maybe you say, “I’m the Clooninator!” You don’t say “I’m George of George Clooney Sells Movies Blog” and you certainly don’t say, “I’m Clooney Weight Loss Plan”. So while spam is technically meat, it ain’t anywhere near Primal. Please nickname yourself something your friends would call you.

  1. I also think the mental benefits of long distance running are a big plus. Sometimes I just need to get out of the house and be by myself to relax and unwind. I find going for a long distance run is the perfect way to do this.

    Tom Parker wrote on November 19th, 2011
  2. As mentioned above there are two types of matcha – culinary or ceremonial grade. Ceremonial grade is recommended for drinking. Not sure which brand to buy, though.

    Healthy11 wrote on November 21st, 2011
  3. very informative article.

    I did skip drinking coffee almost totally lately and been drinking matcha instead…I just have it straight with maybe one sweetener (I like it sweet). feeling way better than I did after drinking cup or 2 of coffee.

    – Yucca

    Yucca wrote on April 3rd, 2012
  4. Thanks you Marc (sorry for the delay) for answering my question about fasting, but I do want to point out a few things in the response. When the article talks about a steady supply of calories, you eat the same amount of calories by eating more on non fasting days. I think that counts as a steady supply. The article talks about eating many calories in one sitting, but that’s assuming you have a reduced eating window which is NOT in the majority (or any) of the animal studies. They simply have a 24 hour eating then a 24 hour non eating window. You could eat breakfast, lunch, and dinner on a non fasting day and manage to make up all the calories, which is possible for almost everyone to do without getting stuffed. This does seem to be quite possible long term. When the article says the benefits are not necessary until later, why? Animal studies for calorie restriction and IF always start when animals are young, teen or pre teen. I think missing out on a decade of benefits, especially the activation of genes critical for longevity, could be detrimental for future well being and unnecessary as well. Any comments?

    Will wrote on April 15th, 2012
  5. Adagio Teas is where I get my matcha and it is fantastic. It is very affordable for high quality ceremonial grade matcha. There matcha is an actual tencha (it would have to be to be considered matcha; most sold in the U.S. and on Amazon are sencha green tea powders) and is Ceremonial Imperial grade. It comes from the Shizuoka Prefecture.


    Sarah wrote on November 6th, 2014

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