Nutritious, Healthy Foods: Their Side Effects And Contraindications

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In researching this article, this writer believed that even the healthy, nutritious foods, no matter how healthy and nutritious, have their down side. They may have side effects; contraindications when interacting with medication or other foods; and they may even need caution in consuming.

While certainly not every food in the world is listed in this article, these were the only foods of those researched of which there were any indication of side effects or contraindications. Of course not every food in the world was researched but only some of the ones with which the public may be more familiar.


It is said that when garlic is taken in overly generous doses, nausea, vomiting, and diarrhea could result.  Also, there is a possible chance of heartburn occurring.  Body odor is one of it’s most well known side effects.  If intending to eat a lot of garlic, a sensible way to exercise caution and avoid these possible garlic side effects is to start small and to slowly build the dosage of garlic up. A limitation of up to one small clove a day is indicated at the beginning.

It is one thing to eat garlic fried or otherwise cooked. It is another to eat raw garlic, which is medicinally a lot more pungent and potent than cooked garlic. Raw garlic is very powerful and has been shown in many instances that it can affect the digestive tract if overly consumed. Garlic juice can ‘burn’ the stomach and digestive tract, as well, so proceed carefully.

Food Allergies to Garlic

Garlic allergy, though not common, does exist in some cases. Some study groups have shown that garlic allergic symptoms sometimes show up in some persons in the form of: skin rashes, mild fever, nausea, vomiting and headache.

Potential Coontraindications and Drug Interactions of Garlic

Garlic could potentially disrupt anti-coagulants, so it is best to be avoided before surgery. If scheduled for surgery, it is wise to first check with a doctor with regard to eating garlic. It is a well-known blood thinner and can also react with certain prescription drugs like: warfarin, antihypertensives and antiplatelet.  Garlic also has the potential to lower blood pressure, as does the grapefruit, so while this a good thing if the blood pressure is high, if it is at the normal level, this may present a problem. (1)


This fruit is loaded with potassium and it is possible to get too much potassium from bananas. Additionally, at the same time, it could throw off a person’s saline (salt) level, since the two work together.  If the sodium gets to low and the potassium too high, it throws off the human electrolyte system, and can cause problems from mild gastrointestinal problems to kidney problems, to severe cardiac problems (cardiac arrest-death if) if the NA (sodium) gets too low (below 120 for too long) and the K+ (potassium) gets too high.

It must be kept in mind and exercise due caution in remembering that eating too many bananas may eventually cause kidney failure due to the fruit’s enormous potassium level. Some doctors don’t recommend more than 3 a day because they are indeed so high in sucrose, as well as potassium.

Eating bananas is a natural, easy way in which you can clean your colon in the comfort of your own home, as they do precipitate bowel movements most easily. Being fiber rich, the bananas help get rid of harmful materials in one’s body while absorbing nutrients. It is also a great way to de-tox. Yet, it can also cause diarrhea if consume in too large quantities. (2) So, while tremendously nutritious, due to this side effect, due caution should also be taken.


One common side effect of too much avocado intake is allergy or hypersensitivity. The symptoms may include: skin reactions, vomiting, bronchial asthma, rhinoconjunctivitis, urticaria and angioedema.

An another interesting fact is that avocados are fruits that actually contain 60% more potassium than bananas. Therefore, what applies to the banana for side effects may also apply to the avocado, if not more so. They are also a form of diuretic as is the spinach.(3)


Because of it’s great iron content, (as the avocado), constipation may result in some cases. Otherwise, there seems to be no other contraindications or side effects found in this healthy and nutritious food.

These aforementioned foods are so nutritious, healthy, and beneficial to mankind, that there is actually no reason to even warrant a caution. One would have to eat an aw-aw-ful lot in quantity with much regularity in order to really experience much in the way of discomfort or side effects.

Curiously, the most danger in eating any of these foods is found in the fact of human contamination as in the case of salmonella and e-coli bacteria. With proper cleaning and disinfectant use, this should not in itself be a problem.

It is written in the Bible, that persons should be encouraged to live lives of moderation – in all things. Perhaps, concerning the consumption of foods, it would be particularly wise to eat moderately of the earth’s bounty. In so doing, humankind would certainly avoid most of the few side effects and contraindications which result from eating these particular foods and others which may not be known in other places.




(2) Read more:


Authored by Beverly Anne Sanchez,, 2010.


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