I learn that fruit with or after a meal is a BAD idea, that's why I got so sick & vomit after eating sunflower seeds (high in protein & fat), then drink acidic cherry and lemon juice. See excerpt from below link on bad food combo::

"Bhaswati Bhattacharya, MD, a holistic health counselor and physician in New York City, agrees. “Sugars are actually not easy to digest, according to Ayurveda, because they are heavy and require good fire to process. That is why fruits should be eaten alone.”

Eat fruit 30 to 60 minutes before your meals. That’s why, says Alder, eating fruit first makes the digestive tract “more capable of absorbing nutrition.” After a meal, wait at least three hours before eating fruit.

Combine protein or starches with nonstarchy vegetables. If you do have to mix animal protein and starch, add leafy green vegetables to minimize the negative side effects.

LIQUID WITH MEALS:

Why: Water goes through the stomach in about 10 minutes. Juice takes 15 to 30 minutes. Any liquid in your stomach dilutes the enzymes your body needs to digest proteins, carbohydrates, and fats.

Drink as much water as you wish at least 10 minutes before you eat. After eating, wait about an hour to have any liquid — or longer for a more complex meal.

It’s best to eat meat in the last course of your meal. “The first course should not be meat; it should be light vegetables.

Read more: http://www.care2.com/greenliving/5-food-combinations-to-avoid.html#ixzz3vY8IheTL

The second site of bad food combo lists the same mistakes of mixing acid with fats or hard-to-digest food:

Fruit after a meal, plus Tomato and cheese- a combo of an acidic food (tomato) with a carbohydrate (pasta) is one of the worst food combinations ever.

Cereal with milk and orange juice- This is a big no-no mostly because the acid in the orange juice destroys the digestive enzymes required to break down the starch present in the cereal. Furthermore, the acid of the orange juice causes curdling of milk in the stomach, which causes it to turn into a heavy mucus-forming substance.

Bananas and milk- bananas and milk are the worst foods to be put together. Their combination is highly toxic, and creates heaviness in the stomach.

Fruit and yogurt- Yogurt and fruit combo is one of the worst food combinations according to Ayurveda.

Read more: http://www.digitaljournal.com/article/352639#ixzz3vY90gEvY

More bad food combo below: combining 2 bloating substances, or 2 hard to digest protein, or contrasting nutrients:

Watermelon + Milk

This combination may cause some discomfort and lead to the production of more gas than usual. Hence it is best to avoid drinking milk after eating some watermelon.

Mint + Aerated Drinks

You have probably seen the experiments conducted with mentos and a bottle of coke. Imagine that explosion happening inside your stomach. You will feel bloated like a balloon.

Papaya + Water

Having water after eating papaya can cause problems for your digestive system. In fact it is not advisable to consume water after eating cucumber or watermelon either.

Eggs + Milk

The difference in the structure of the proteins make it difficult for them to be digested together.

Vinegar + Tea

This combination can cause severe constipation. It can also lead to the metabolism of toxic substances and hence is not conducive to your health.

http://www.scoopwhoop.com/inothernews/bad-food-combos/

Lots of people, including me, don't know that cherry seeds, if crushed, yield a toxic substances. The below link lists plants that have toxic substance in them, enough to kill, if the wrong part is eaten:

http://wonderwise.unl.edu/14africa/a-plant.htm

An excerpt from below link:

"Fruits which have a pit, such as cherries or apricots, often contain either cyanides or cyanogenic glycosides in the pit. Bitter almonds, from which almond oil and flavouring is made, also contain cyanide." Ryan Jones.

Bluenoise from Canada wrote: " When a part of the potatoe is above ground it turns green in response to the sunlight. Eating this green portion raw can be deadly. And I'm serious it can kill you. There are chemicals in them that can stop your heat from beating. The potatoe produces this chemical to stop pests from eating it."

Stonecat from scienceforum wrote: "Yes! There are toxic food combinations. It happened to me ... I had a banana, yogurt and half a peanut butter sandwich ...then 20 minutes later 1/2 a tuna sandwich with orange juice, then a chocolate bar. The result was a nausea but I couldn't vomit. I nearly died. Months later an article appeared in a popular magazine, listing orage juice, tuna, chocolate, milk, and peanuts, as potential hazards if you consume 3 and I had consumed all 5!

http://www.scienceforums.net/topic/14791-toxic-food-combinations/

Many people got sick from cherry and milk together. Some excerpts from a food-discussion forum:

http://www.chowhound.com/post/toxic-food-combinations-moved-general-topics-board-319670

" Emmarie59 Jul 14, 2011 10:18 AM

I am horribly allergic to fresh cherries and fresh milk, when consumed within an hour or so of each other. Sweating/chills, projectile vomiting and diarrhea for at least 12 hours."

JMF Aug 22, 2006 08:10 PM

Most especially durian and beer. Over ripe durian belches are best avoided if you value your sanity and your friends and family. I wanted to die the one time I had this combo.

azndove07 Dec 1, 2007 12:47 AM

the combination of crab and persimmon is very true, believe it or not. my mom just this very week had a really bad reaction and had to be hospitalized for a day. my mom never had any allergies before either. she first had persimmons then had a crab noodle soup later that night and she had a terrible rash break out all over her body.

AmyH Jan 28, 2008 10:37 AM

Seafood or fish in a creamy sauce (like lobster newburg) makes me sick, especially when accompanied by a glass of wine.

Chinon00 Dec 1, 2007 06:21 PM

Emeril always cautioned against combining citrus with dairy.

moh Dec 2, 2007 06:52 AM

another toxic combination: Korean salted pollack (fish) roe and chocolate. Fishy doesn't go so well with cocoa.

alizeeh Feb 7, 2015 06:41 PM

exact same thing happens to me when i have any soft dairy, i.e. milk or cream, and even a small bit of citrus...it could be lemon on fish, a sip of OJ ... One day I ate cottage cheese, then a lemon fruit bar...sick as a dog.

I'm still sick & nauseated from the bad combo last night (sunflower seeds & cherry juice & lemonade), Men's Health has an excellent article on how certain medications mixed with certain food/drink can have a deadly effect & toxic: http://www.menshealth.com/health/

1. Limes and cough medicine. You may have heard not to drink grapefruit juice with some prescriptions, including cholesterol-lowering statins. But limes, pomelos, and Seville oranges—although not the more-common navel and Valencia varieties—also may block an enzyme that breaks down statins and other drugs, including the cough suppressant dextromethorphan ... this includes hallucinations and sleepiness; in statins, you may sustain severe muscle damage.

2. Dairy products and antibiotics. Some antibiotics, including Cipro, bind to calcium, iron, and other minerals in milk-based foods. “This prevents the absorption of the antibiotics, ultimately decreasing their ability to fight infections,” Gullickson says. When you get a new prescription for acne or an infection, ask if the drug falls into a class known as tetracyclines or flouroquinolones. If so, avoid milk, yogurt, and cheese 2 hours before and after taking the pills.

3. Smoked meats and antidepressants. Check the label on your happy pills. If they belong to a class called monoamine oxidase inhibitors or MAOIs—brand names Marplan, Nardil, Emsam, or Parnate—combining them with foods rich in the amino acid tyramine can cause life-threatening spikes in blood pressure, says Gullickson. Unfortunately, the list of no-nos includes not only summer sausage and smoked salmon, but also red wine, sauerkraut, hot dogs, aged cheeses, soy sauce, and draft or home-brewed beer.

4. Chocolate and Ritalin. Besides caffeine, chocolate also contains a stimulant called theobromine, says Tom Wheeler, Pharm.D., B.C.P.S., director of pharmacy and pulmonary services at Advocate Illinois Masonic Medical Center in Chicago. (It’s the reason chocolate harms dogs—canine bodies can’t break it down.) Combining all these stimulants in humans can potentially lead to erratic behavior and seizures.

5. Apple juice and allergy meds. Nix the nectar from apples, oranges, and grapefruits if you take Allegra (fexofenadine) for hay fever—at least within 4 hours of swallowing the pill, Gullickson advises. These juices inhibit a peptide that transports the drug from your gut to your bloodstream. The resulting lack of absorption makes Allegra up to 70 percent less effective at stopping your sniffling and sneezing, Wheeler says. Other medications also travel with the help of the same peptide; lay off these juices while taking the antibiotics Cipro or Levaquin, the thyroid medication Synthroid, or the allergy and asthma treatment Singulair, Gullickson says.

6. Cinnamon and warfarin. People taking the blood-thinning medication warfarin—prescribed to prevent or treat clots—have long been warned to keep their intake of vitamin K steady, says Wolfe. This means you shouldn’t change your weekly intake of foods like leafy greens or broccoli; because vitamin K plays a key role in clotting, doing so could affect the thickness of your blood. But there’s another risk. Cassia cinnamon, the kind on most American grocery-store shelves, contains high levels of a compound called coumarin that can thin blood and potentially cause liver damage, says Eric Newman, M.D

7. Alcohol and acetaminophen. Resist the urge to wash down your Tylenol with a cold one—your body uses the same enzyme to break down the two substances.

http://www.menshealth.com/health/

Fox news have a link on foods that could kill .. didn't know that 2 cherry pits have enough cyanide to kill. Didn't know that rice has arsenic: "Rice (especially rice grown in Texas) contains arsenic, a toxin that can cause bad things like vomiting, abdominal pain, and vertigo when consumed in large quantities."

http://www.foxnews.com/leisure/2013/10/21/8-foods-that-could-kill-if-eat-enough-them/

From Straw: I suspect that the sunflower seeds I consumed were contaminated with pesticides, leading to my vomiting, abdominal pain, and vertigo. Found the below link on arsenic in nuts: " Several types of nuts were analyzed, including walnuts, Brazil nuts, almonds, cashews, pine nuts, peanuts, pistachio nuts, and sunflower seeds.... MMAs(V) was not detected in almonds, peanuts, pine nuts, sunflower seeds, or walnuts, and the highest concentration was found in pistachio nuts."

http://www.ncbi.nlm.nih.gov/pubmed/15030196

" The arsenic enters into the rice when it is grown, according to Dr. Philip Landrigan, a pediatrician at New York’s Mount Sinai School of Medicine. He explained the rice with the highest levels of arsenic is from Texas and Louisiana, and along the Gulf coast where fields were used to grow cotton a century ago. “When there was cotton there they had to treat the cotton with arsenic pesticides to control the bowl weevil,” he said. “Now a century later, that arsenic is still in the soil, the rice is very effective at pulling it out of the soil in and it concentrates in the rice.”

Landrigan recommended in the coming months and years that parents avoid rice altogether or just rice that was grown in Texas, Louisiana, and Missouri. “Stay with California rice, stay with Asian rice or when in doubt go with barley, go with oatmeal,” he said.

http://dfw.cbslocal.com/2012/09/19/study-says-arsenic-levels-high-in-texas-rice/

Here's a link from Consumer Reports, entitled "FDA data show arsenic in rice, juice, and beer. "The study noted that more than 10 percent of the rice in China, Pakistan, and Bangladesh is estimated to have arsenic concentrations exceeding 200 ppb, while in the U.S., more than 50 percent of the rice is estimated to contain arsenic at those elevated levels".

Ever since the release of our test results for arsenic in juice in 2011, Consumer Reports has recommended setting a limit of 3 ppb of total arsenic for apple juice. If that is not immediately feasible, our experts say that it should be no higher than 4.4 ppb .. urged the FDA to set action levels for other juices, such as pear and grape, where tests have found inorganic arsenic levels much higher than 10 ppb.

Feed and fertilizer sources

One way arsenic might enter the food supply is through the use of arsenic-based drugs in feed given to chickens, turkeys, and pigs to prevent disease and promote growth. Poultry droppings are used to fertilize many crops and can contaminate them with arsenic ... according to a July 2013 study led by researchers at the Johns Hopkins Center for a Livable Future."

http://www.consumerreports.org/cro/news/2014/01/fda-data-show-arsenic-in-rice-juice-and-beer/index.htm

Prevention magazine has a good tip on reducing arsenic: " There’s good research indicating that you can lower the amount of arsenic in rice by 30 to 40% if you take this simple step (the more water the better). Unfortunately, white rice doesn’t hold up well to this kind of cooking, but you can reduce arsenic levels somewhat by rinsing white rice before you cook it."