How to Cook Spinach So It Doesn't Leave a Weird Feeling on Your Teeth (2024)

If I had to create a list of my favorite vegetables, spinach would definitely be at the top. Not only is spinach packed with nutrients like calcium and potassium, but it's also been associated with impressive health benefits like lowering your blood pressure and being good for your skin. Plus, spinach can be used in endless ways, from smoothies to salads to a simple, delicious side dish. But the one downside to spinach? The weird, chalky feeling it can leave on your teeth after you eat it.

That problem (aka "spinach teeth") is common for people who consume the leafy green. And it turns out there's a scientific reason behind that weird feeling: Oxalates. According to Harold McGee, author of On Food and Cooking: The Science and Lore of the Kitchen, "Oxalates are various salts of oxalic acid, a waste product of plant metabolism found in a number of foods ...The sodium and potassium salts are soluble, while the calcium salts are insoluble and form crystals that irritate the mouth and digestive system."

In layman's terms, the undissolvable calcium salts get left behind in your mouth and leave a coating on your teeth. Don't worry though, the oxalic acid won't do damage to your teeth (although too much oxalic acid can lead to kidney stones). And while that's good news, it can still be uncomfortable to eat cooked spinach knowing that your mouth will feel kind of funny. So, to try and combat spinach teeth, I tested four different cooking methods to see if I could lessen the reaction. Here's what happened:

How to Cook Spinach

4 Methods for Cooking Spinach

Test #1- Steaming

A study in the Journal of Agricultural and Food Chemistry conducted an experiment that tested the level of oxalates in vegetables after they were steamed, boiled or baked. While test results for insoluble oxalates varied, I was interested to try the method out for myself.

I used 6 ounces of water to about three handfuls of spinach, and cooked it over medium heat with a lid on the pan to create some steam. The spinach wilted after four minutes. I drained the excess water before eating the spinach.

The result: Good. While I normally feel the crystals on all sides of my teeth, eating this spinach only left that feeling on the backs of my teeth. That's definitely a win in my book!

Test #2- Lemon Juice

I'm not a huge fan of lemon, so I was a little hesitant to try this method. But, according to Jim Correll, a professor of plant pathology at the University of Arkansas, the ascorbic acid found in lemon juice can help dissolve the oxalic acids in spinach.

How to Cook Spinach So It Doesn't Leave a Weird Feeling on Your Teeth (3)

How to Cook Spinach So It Doesn't Leave a Weird Feeling on Your Teeth (4)

I used 2 ounces of lemon juice to about three handfuls of spinach, and cooked it over medium heat. The spinach wilted after five minutes and turned a little yellow, presumably due to the lemon juice.

The result: OK. Turns out, 2 ounces of lemon juice was way, way too much. The spinach was so tart it made my mouth pucker. But aside from my acidic blunder, I did find that the crystals on my teeth were allocated to just the backs, and the feeling was nowhere near as intense as usual. This is a win for people who like lemon with their spinach. For me, I would definitely try this test again, but with less lemon juice.

27 Dinners That Start with a Bag of Fresh Spinach

Test #3- Yogurt

I was most skeptical about this method, mainly because I got the suggestion from a Reddit thread. However, a study published in Food Chemistry conducted an experiment where calcium compounds were added to raw spinach and resulted in reduced oxalates, so I was curious to see if the same idea could be applied to cooked spinach and insoluble oxalates.

How to Cook Spinach So It Doesn't Leave a Weird Feeling on Your Teeth (5)

How to Cook Spinach So It Doesn't Leave a Weird Feeling on Your Teeth (6)

I tried it with 2 tablespoons of plain yogurt to about three handfuls of spinach, and cooked it over medium heat. The spinach wilted after four minutes but the yogurt separated.

The result: Awful! First, the broken clumps of yogurt led to a very unappealing visual. The yogurt did nothing and the spinach made my whole mouth feel dry and covered in the crystals.

Test #4- Boiling

The aforementioned study from the Journal of Agricultural and Food Chemistry mentioned boiling vegetables as another method for reducing oxalates, so I was hopeful about this test after the moderate success of the steaming method.

How to Cook Spinach So It Doesn't Leave a Weird Feeling on Your Teeth (7)

How to Cook Spinach So It Doesn't Leave a Weird Feeling on Your Teeth (8)

I filled a medium pan halfway with water before adding about three handfuls of spinach. After three minutes on a medium-high boil, the spinach wilted. I drained the excess water before eating the spinach.

The result: We have a winner! While the crystals didn't disappear completely, they covered a much smaller surface area in my mouth compared to the other results. And the lingering feeling of spinach teeth, which usually lasts until I brush my teeth, lasted for far less time than normal.

The Bottom Line

While no one method completely removed the feeling of spinach teeth, it was still fun to try out the different methods. Although I'll stay far away from yogurt when cooking spinach in the future, I'll definitely use the boiling and steaming methods again whenever I want a healthy side of cooked spinach!

How to Cook Spinach So It Doesn't Leave a Weird Feeling on Your Teeth (2024)

FAQs

How to Cook Spinach So It Doesn't Leave a Weird Feeling on Your Teeth? ›

One of the simplest solutions is cooking the spinach. Methods like boiling and steaming allow the soluble oxalates to leech into the cooking water, which studies reveal can lower the oxalic acid levels anywhere from 30 to 87 percent. But keep in mind: a lot of the other beneficial nutrients will get left behind.

How do I make spinach not make my teeth feel weird? ›

Cook or blanch the spinach. The more you cook the spinach, the more neutral it will become; the less acid there will be in it. For more fun facts about certain foods and how they affect your teeth, don't hesitate to ask our dentists in Methuen!

Is cooked spinach bad for your teeth? ›

You shouldn't be worried that this type of acid will erode your tooth enamel. The pH levels of spinach, especially when it is cooked don't have much of an effect because they are so close to neutral. Actually, oxalic acid can actually help in reducing tooth sensitivity.

How do you cook spinach to remove oxalic acid? ›

Generally leaves are boiled or steamed just long enough for them to wilt but not to lose their colour. This gives time for the oxalic acid to leak into the water, freeing up a number of nutrients (but not allowing more nutrients to escape). Usually boiling or steaming spinach for about a minute is sufficient.

Why does spinach make me feel weird? ›

As the spinach cooks, the cell walls break down and release oxalic acid that coats the mouth when you eat the vegetable. It's as if your teeth have been lightly scratched against—an unpleasant feeling that lingers for an hour or two afterward.

Does boiling spinach remove oxalates? ›

Spinach has been regarded as a high-risk food for individuals susceptible to kidney stone formation due to its capability in increasing the excretion of urinary oxalates. [38] The consumption of boiled spinach may lower risk as significant amounts of soluble oxalate are leached out during boiling (67% loss).

How to get rid of oxalic acid in mouth? ›

Particularly eating foods containing Vitamin C is a good way to get rid of oxalic acid. Vitamin C counteracts the sticky sensation you feel when eating foods rich in oxalic acid. But please eat those citrus fruits in moderation as too much citric acid can damage your teeth!

Is it OK to eat cooked spinach every day? ›

Garima Goyal, a dietician and nutritionist says it is safe to consume the leafy vegetable daily, as long as it is taken in “limited quantities”. “Spinach contains essential B-complex vitamins like folate, as well as vitamins A, C and K. Most diets lack one or more essential vitamins.

Is spinach healthier cooked or raw? ›

Spinach. The leafy green is packed with nutrients, but you'll absorb more calcium and iron if you eat it cooked. The reason: Spinach is loaded with oxalic acid, which blocks the absorption of iron and calcium but breaks down under high temperatures. What Do You Really Get When You Buy Organic?

Does microwaving spinach reduce oxalates? ›

The microwave cooking method at a processing time of 1–5 minutes reduced oxalate content from: 0.77 to 0.44 mg/g in kale, 2.42 to 0.88 mg/g in spinach, 4.62 to 2.86 mg/g in beans, 0.98 to 0.32 mg/g in carrot and 6.38 to 4.35 mg/g in tomatoes.

What cancels out oxalic acid? ›

At lower oxalic acid concentrations, oxalic acid destruction was successfully achieved via use of H2O2 and heating.

What are the symptoms of too much oxalates? ›

Oxalates could be a hidden source of headaches, urinary pain, genital irritation, joint, muscle, intestinal or eye pain. Other common oxalate-caused symptoms can also include mood conditions, anxiety, sleep problems, weakness, atherosclerosis, prostatitis and burning feet.

How do you get rid of spinach teeth? ›

Test #2- Lemon Juice

I'm not a huge fan of lemon, so I was a little hesitant to try this method. But, according to Jim Correll, a professor of plant pathology at the University of Arkansas, the ascorbic acid found in lemon juice can help dissolve the oxalic acids in spinach. The spinach while it cooked.

Why do my teeth feel weird after eating cooked spinach? ›

As well as being a great source of iron, spinach is packed full of oxalic acid. When you chew spinach, calcium in your saliva reacts with the oxalic acid to create insoluble calcium oxalate crystals. These stick to your teeth and make them feel gritty or chalky.

Why shouldn't we eat spinach at night? ›

There is no scientific basis for not eating spinach at night.

Can I brush my teeth after eating spinach? ›

While you don't have to worry about oxalic acid harming your teeth, the sensation can still pose a problem when you're trying to eat your greens. Brushing your teeth after eating spinach can be a quick way to remove the feeling, but there are some tricks you can try to eliminate the texture before you eat the spinach.

How do you make spinach not chewy? ›

To be able to get rid of that waxy and chewy that's what the water helps to be able to do. So if the sauteing and the pan didn't work and try the water bath instead, but again just super fast in and out to be able to rinse some of that off and then cook it slightly.

How to get spinach taste out of mouth? ›

One of the simplest solutions is cooking the spinach. Methods like boiling and steaming allow the soluble oxalates to leech into the cooking water, which studies reveal can lower the oxalic acid levels anywhere from 30 to 87 percent.

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