Meet Mark

Let me introduce myself. My name is Mark Sisson. I’m 63 years young. I live and work in Malibu, California. In a past life I was a professional marathoner and triathlete. Now my life goal is to help 100 million people get healthy. I started this blog in 2006 to empower people to take full responsibility for their own health and enjoyment of life by investigating, discussing, and critically rethinking everything we’ve assumed to be true about health and wellness...

Tell Me More
Stay Connected
April 17, 2008

Smart Fuel: Spinach

By Worker Bee
26 Comments

Perhaps Popeye had it right. He pounded spinach for super-human strength and loved olive oil (although granted, it was a girl, not the healthy fat Rachel Ray is always harping on about!). But is spinach really good for your muscles and can it give you the boost you need to take on ol’ Bluto?

Let’s start with the most basic stuff: Calorie for calorie, spinach is perhaps one of the most nutrient dense vegetables out there (and it’s no slouch in the flavonoid department, but we’ll talk about that in a minute). In the vitamin department, it logs literally off-the-charts levels of vitamin K and vitamin A, providing 1110% and 234%, respectively, per 1 cup serving of boiled spinach (or 6 cups of raw spinach). Why would this be important? Well, vitamin K is important for bone health (especially when combined with calcium and magnesium, spinach’s other bone-building nutrients) and vitamin A is important for reducing the amount of free-radicals in the body as well as preventing cholesterol from oxidation – which is the process whereby cholesterol can cause damage to arteries. This effect is further amplified when the vitamin A is combined with vitamin C – which spinach also has in spades – a combination that is also thought to reduce inflammation, particularly among patients suffering from asthma, osteoarthritis and rheumatoid arthritis.

Rounding out the nutrient profile, spinach is an excellent source of folate, which is important for blood health, as well as magnesium, which mimics the role of angiotensin inhibitors to help regulate blood pressure and prevent heart disease. When cooked, spinach is also an excellent source of iron, which is one of the primary components in hemoglobin – and thus has a role in energy production and metabolism.

Now on to the flavonoids: Current research suggests that are 13 different flavonoid compounds in spinach that not only serve as antioxidants but may also reduce the risk of cancer. Specifically, there are several spinach extracts that have been shown to reduce the risk of skin cancer, with one study published in the American Journal of Clinical Nutrition suggesting that consuming spinach or other dark leafy green vegetables can reduce the risk of skin cancer recurring among those with a previous history by as much as 55%. A study published in Cancer Causes & Control, meanwhile, also found that spinach and other vibrantly-hued vegetables could also reduce the risk of stomach cancer (gastric adenocarcinoma). Still need proof? A second study published in Cancer Causes & Control has also suggested that it may also reduce ovarian cancer risk while a study published in the September 2004 edition of the Journal of Nutrition suggests that the neoxathin contained in spinach may also help reduce the risk of prostate cancer.

But what about the muscles? Well, the reality is, spinach probably isn’t going to give you super human strength (or gargantuan muscles ala Popeye), but when it conveys this many other health benefits, perhaps it makes sense to keep on eating it and plan on outliving – as opposed to straight pulverizing – Bluto.

Spiff 27 Flickr Photo (CC)

Further Reading:

More Smart Fuel

FitSugar: Frozen Spinach Does the Body Good

The Consumerist: Spinach Facilities are Unsafe, Disgusting and the FDA Doesn’t Care

Subscribe to Mark’s Daily Apple feeds

Subscribe to the Newsletter

If you'd like to add an avatar to all of your comments click here!

Leave a Reply

26 Comments on "Smart Fuel: Spinach"

avatar

Sort by:   newest | oldest | most voted
Jerry
Jerry
8 years 5 months ago

I had a kidney stone before, and when I was doing research about it I read that spinach was something that could definitely cause kidney stones. I wasn’t eating spinach so it wasn’t the cause of mine, but just curious on Marks’s thoughts on this?

JC
JC
8 years 5 months ago

My concern with spinich is the high iron content, for males it is not good to have high blood levels, from what i’ve read it acts as a catalist & can promote free radical production, for pre-menopausal women this is less of an issue

Erin
Erin
3 years 2 months ago

Donate blood if you are able!

CC
CC
8 years 5 months ago

The posting on spinach says, “When cooked spinach is an excellent source of iron.” Does it have to be cooked to be such a good source?

Sally
Sally
6 years 10 months ago
Unless we’re talking about cooking it in an iron skillet, which would indeed add iron to the food, cooking neither increases nor decreases iron content. (Cooking often destroys vitamins, and I believe maybe fiber as well, but minerals are chemical elements and aren’t destroyed without nuclear reactions. They don’t usually evaporate either.) I suspect what is meant here is that cooking spinach decreases its volume (it wilts a lot!), while preserving the same total amount of iron… therefore the iron is more concentrated. A serving of cooked spinach is probably a greater amount of spinach (and therefore iron) than raw… Read more »
Amy
8 years 5 months ago
How lovely to happen upon this article as I eat my lunch, which, coincidentally, includes a spinach salad! To add to the others concerns about spinach, I had heard that spinach can also contribute to gout, a very painful joint inflammation. Odd that a substance purported to have anti-inflammatory properties would contribute to an arthritis-like condition. I wonder if this and the other negative health issues are only a concern when spinach is consumed in excessive amounts, or perhaps in combination with some other, less healthy foods? I have heard that brown colas can also be a factor in kidney… Read more »
trackback

[…] granted, we’ve discussed many of these nutritional powerhouses in previous posts – here, here and here, for instance – but you see, and not to get all girly on you here, but leafy green […]

trackback

[…] said it before, but we’ll say it again: Spinach is one heck of a vegetable! Spinach is a great source of vitamin […]

Ladyevidence
Ladyevidence
7 years 11 months ago

I love spinach… a LOT. But, I know the issues with eating it too much. For example, in this post, you said that one cup can provide 1110% of our vitamin K… but Vitamin K is not water soluble. Having such extreme amounts of it for prolonged periods of time is toxic.

Primal Toad
6 years 2 months ago

Spinach is my favorite green to add to my primal green smoothies. It is by far the mildleist tasting green but possibly the most nutritious? That is too amazing!

wd
wd
5 years 10 months ago

What about the part about spinach including high levels of oxalate, en.wikipedia.org/wiki/Spinach#Iron , it appears to be a major downside. How do you counter this?

Matt
Matt
5 years 8 months ago

Spinach is great, just look at Ivan Drago…

“Then how do you explain his freakish strength?”

“Like your Popeye, he ate his spinach every day.”

I must break you.

trackback

[…] Spinach offers calcium and magnesium in spades, pairs well with meat of any kind, can be sauteed, steamed, thrown into soups, or eaten raw, and provides roughage when I’m into that sort of thing. […]

trackback

[…] Spinach is a powerhouse in the veggie world.  And if I can sneak some into my post-workout meal (which also was my breakfast this morning) more power to me […]

trackback

[…] your least favorite part of any salad, minimize the greens portion and try out alternatives. Baby spinach and romaine, for example have more flavor than iceberg but are still pretty tame. Butterhead […]

trackback
4 years 10 months ago

[…] your least favorite part of any salad, minimize the greens portion and try out alternatives. Baby spinach and romaine, for example have more flavor than iceberg but are still pretty tame. Butterhead […]

trackback

[…] – I love spinach, always have. It’s a great source of magnesium, calcium, manganese, vitamin K… and oxalates. […]

trackback

[…] Spenat […]

trackback

[…] Spinach is one of the most nutrient dense foods out there and has lots of vitamin k and vitamin A.  There is also 13 different flavonoid compounds in spinach that not only serve as antioxidents but may also reduce the risk of cancer.  http://www.marksdailyapple.com/spinach/#axzz1szfvNxUR  […]

trackback

[…] seeds, is that it also produces edible, nutritious leaves. Amaranth leaves taste a bit like spinach and can be eaten raw, though they’re substantial enough for sautéeing and stir-frying. Legend […]

trackback

[…] of folate, magnesium and iron; contains 13 flavonoid compounds that may reduce the risk of cancer. (source for all those […]

trackback
1 year 11 months ago

[…] recipe only uses 2 ounces of high-quality salami and delivers a whole lot of flavor. If you’re spinach adverse, or vegetable adverse for that matter, maybe a drizzle of chorizo vinaigrette will help the […]

trackback

[…] veggies rolled into one will do. Traditional fillings for this South American dish include garlic, spinach, bell pepper, carrots, olives, hardboiled eggs and fresh herbs. But you can, and should, stuff […]

trackback

[…] “But what about the muscles? Well, the reality is, spinach probably isn’t going to give you super human strength (or gargantuan muscles ala Popeye), but when it conveys this many other health benefits, perhaps it makes sense to keep on eating it and plan on outliving – as opposed to straight pulverizing – Bluto”. – Mark Sisson […]

trackback

[…] of the dinner roll. You load up on saut?Šed spinach instead of French fries. You eat kale chips instead of potato […]

trackback

[…] Read more: http://www.marksdailyapple.com/spinach/#ixzz2ZPFfH3Zw […]

wpDiscuz