Although spinach is among the many healthiest of greens with a strong dietary profile, consuming it in extra might result in points. Therefore, moderation is vital. As an example, extra consumption of spinach might result in kidney stones because the vegetable was discovered to extend urinary calcium excretion (1).

On this put up, we’ll focus on the uncomfortable side effects of extreme consumption of spinach.

What Are The Main Facet Results Of Spinach?

Spinach is excessive in oxalates, and their extra consumption over a interval might result in the formation of kidney stones. The vitamin Ok in spinach may additionally intervene with blood thinners and sure different drugs.

1. Might Improve Kidney Stone Threat

Spinach comprises oxalates, that are compounds that may kind stones within the human system if consumed in extra. These stones are shaped by a rise in oxalate content material within the urine. The commonest forms of kidney stones are calcium oxalate stones (1).

100 grams of spinach comprises 970 milligrams of oxalates (2).

Boiling spinach might scale back the oxalate focus to some extent. Combining a calcium-based meals (like curd or cottage cheese) with spinach also can stop stone formation (3). Nonetheless, each particular person’s situation is exclusive, and the response might differ from individual to individual. Therefore, please test along with your physician if you happen to can embody spinach in your eating regimen.


2. Might Intervene With Blood Thinners

Spinach comprises excessive ranges of vitamin Ok, a mineral that reduces the effectiveness of blood thinners. Blood thinners are often given to forestall the onset of stroke. Therefore, inclined people should scale back their spinach consumption (4).

Warfarin is a blood thinner that’s prescribed for people who’re liable to forming dangerous blood clots. Vitamin Ok was discovered to cut back the effectiveness of Warfarin (5). It is because vitamin Ok performs a significant position in forming blood clots in your physique.

Whereas half a cup of cooked spinach comprises 444 mcg of vitamin Ok, one cup of uncooked spinach comprises 145 mcg of the nutrient (6). Cooked spinach has greater vitamin Ok ranges as warmth will increase the absorption of the nutrient.

Nonetheless, you shouldn’t eradicate vitamin Ok out of your eating regimen as meals wealthy within the nutrient, like spinach, comprise different important nutritional vitamins and minerals as nicely. Vitamin Ok additionally has a job to play within the prevention of arterial calcifications, coronary coronary heart illness, most cancers, and osteoporosis (7). It’s best to seek the advice of your physician, who might improve the dosage of your blood thinner.

Consuming spinach sometimes, sparsely, might be a safer choice (offered the particular person is steady and never in an acute part of sickness).

3. Might Hinder Mineral Absorption

There’s some analysis that the consumption of oxalate-rich meals can inhibit mineral absorption. Oxalate is an antinutrient (8).

The oxalates in spinach may additionally hinder the absorption of minerals like calcium. Spinach comprises each oxalates and calcium, and consuming it in giant quantities might impair the absorption of calcium in your system (9).

Spinach didn’t appear to have this impact on calcium when it was taken together with milk (9). It is because although spinach comprises calcium, the nutrient from the vegetable is absorbed solely one-tenth as effectively as milk calcium (10).

The oxalates in spinach also can react with iron and inhibit its absorption by forming crystals (11).

Spinach can also be thought to compromise thyroid operate because it comprises sure compounds known as goitrogens. Nonetheless, analysis is combined on this regard. When you’ve got thyroid points, please seek the advice of your physician earlier than together with spinach in your eating regimen.

4. Might Irritate Signs Of Gout

Spinach comprises purines, chemical compounds which can be thought to contribute to gout. Nonetheless, there’s a lack of a major affiliation between the consumption of purine-rich greens and gout (12). Therefore, additional analysis is warranted earlier than we will arrive at a definitive conclusion.

But it surely all the time is best to remain secure. If you’re coping with gout, please discuss to your physician about your spinach consumption. For the reason that leafy inexperienced may additionally intervene with sure drugs, you should definitely discuss to your physician if you’re on any.

Some anecdotal proof means that extra consumption of spinach might trigger a person’s blood stress and blood sugar ranges to drop too low. This might be a difficulty for many who are on drugs for treating hypertension and excessive blood sugar. Nonetheless, extra analysis is required to substantiate these results. If you’re on blood sugar or blood stress remedy, ensure that to seek the advice of your physician earlier than together with spinach in your eating regimen.


Spinach is among the many most nutritious meals you’ll find in your kitchen. Nonetheless, as is the case with any meals, moderation is vital.

When you’ve got kidney stones, you could have to drastically scale back and even keep away from spinach consumption (together with different oxalate-containing meals).

In any other case, spinach is a wholesome vegetable, and if you’re a usually wholesome particular person, you shouldn’t miss out on its goodness.

Incessantly Requested Questions

How a lot of spinach is an excessive amount of?

The deadly oral dose of oxalate in people is between 15 to 30 grams (13). This might be between 3 to six kilos of spinach. It’s extremely unlikely for anybody to devour a lot spinach in a brief span of time. Nonetheless, there’s much less analysis to know if this dose is sufficient to result in kidney stone formation.

Can uncooked spinach be unhealthy for you?

Spinach, uncooked or cooked, gives nice advantages. However you probably have kidney stones or are on sure drugs (like blood thinners, and so forth.), chances are you’ll need to keep away from spinach.

Are you able to eat spinach and tomatoes collectively?

Like spinach, tomatoes additionally comprise oxalates (14). Therefore, if you’re somebody susceptible to kidney stones or any drug interactions, chances are you’ll be required to restrict your consumption of tomatoes.

Can spinach make your abdomen damage?

Spinach, by itself, might not damage your abdomen. Nonetheless, consuming an excessive amount of of spinach all too quickly might imply a sudden improve in your fiber consumption. This may increasingly result in a short lived abdomen upset.
Alternatively, ache within the abdomen (particularly on the facet) might be a symptom of kidney stones. When you suspect this might be the case, please go to your physician.


Articles on StyleCraze are backed by verified info from peer-reviewed and tutorial analysis papers, reputed organizations, analysis establishments, and medical associations to make sure accuracy and relevance. Take a look at our editorial coverage for additional particulars.

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  • Dietary Administration of Kidney Stones (Nephrolithiasis), Scientific Diet Analysis, US Nationwide Library of Drugs, Nationwide Institutes of Well being.
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