If someone says they have a food allergy, just believe them. Don't test them. Don't try and prove you're smarter than their food allergy. You're not. As proven by when tcp-45 asked Reddit:

People with food allergy or intolerance, have you ever been 'tricked' by a friend or family member to see if you were lying about your condition? What happened?

Here are those infuriating stories.

My brother is allergic to tree nuts. My aunt thought he was lying because he'd eat things with peanuts in it.

Several times she brought foods with nuts in them to Christmas get togethers. Never bothered my brother much he just didn't eat them. This pissed her off, so once she make this big plate of chocolate chip cookies. My brother eats about 6 of them. About 20 minutes later he's hacking and coughing. Epipen benedryl and a trip to the hospital later my aunt finally tells us that she used almond flour because she knew he was making it up.

My "best friend" at the time didn't believe anyone could be allergic to cedar. It makes my eyes itch and burn then swell shut. She thought I was probably just being dramatic because I didn't like the smell or something. I was spending the night at her place and she brought me some blankets... as soon as I wrapped up in them I realized something was wrong, they reeked of cedar. Her mother kept them in a cedar chest and she thought it would be no big deal. She quickly changed her tune and then apologized profusely once my eyes started to swell shut and I had to call my folks to come take me to the ER in the middle of the damn night.

My mother in law, and not a food.

Fabuloso cleaner is the only thing IN MY LIFE i have been allergic to. My husband's b-tch mother finds out. I'm very pregnant and she brings me a TON of my husband's baby blankets, books, etc. All very well kept.

All cleaned in Fabuloso. Now, the issue is it's not cartoon-level insta-hives. It takes a while. Enough time that i have possibly eaten or touched my face.

To this day she isn't allowed to bring items into my house.

My mom didn't believe my little brother when he told her that he's developed an allergy to bell peppers. That night, she made salad and diced green bell peppers into the salad so that he couldn't see the tiny green cubes. Within minutes, his throat swelled and he developed hives all over his face and neck. My mom told him to stop being dramatic as he was coughing and gasping for air. I grabbed my epipen from my bag and injected him as he began to faint while my mom screamed at us for being ungrateful brats who refuse to appreciate the food she cooked for us. We are both no contact now.

I'm lactose intolerant and my girlfriend's mum just assumed I'm a fussy eater (which I'm not - at all)

So she made a delicious leek and potato soup, with fresh cream.

I had 2 bowls it was so nice, 20 minutes later I'm bloated as hell. 20 minutes later I'm farting like a trooper.

She kept asking me to leave the living room, I politely refused.

She hasn't done it since.

I have a couple of different major allergies. Two of them are...odd. As a result most people think I'm just pulling their leg. I have an allergy to Cocoa (aka chocolate) and the tobacco plant.

My mom's side of the family was brutal people. They fed me chocolate laced breakfast foods and candies without my knowledge, but since I was so small when they discovered by allergy...I hadn't had enough chocolate to know what it tasted like besides pain. I just knew my mouth would tingle, my throat would feel tight, and that I would throw up not soon afterwards.

My mom figured out these 'throwing up fits' would happen ONLY around her family, she asked them to stop.

...they didn't.

So one day my Aunt gives me a full-sized hunk of pure dark chocolate. I go into a full reaction and I still remember her freaking out when I dropped/started changing colors and calling an ambulance. No I don't remember the ride and apparently my oxygen went down so much by the time the ambulance got there that any longer and I would have suffocated. I was stomach pumped and traced and left in ICU for a couple of days because my lungs couldn't handle it and breathing was a nightmare.

Cilantro. I guess my reaction would classify as an intolerance and not an allergy (i.e. no anaphylactic reaction) however a friend thought I was lying and put some in a salsa she made to see if "I could tell". Oh, I could tell alright I could tell as soon as my stomach started to swell and I started to feel very nauseous. Showed her by throwing up all over her bathroom. Sucker.

My parents, to an extent.

When I was a small child, I stopped breathing when my parents moved me from breast milk to baby milk (cow milk). I stopped breathing, and was rushed to the hospital. The doctors told my parents that I was 'likely' lactose intolerance, and to just be careful to dairy.

My parents continued to feed my dairy.

When I was around 18 I was eating so much dairy daily. I was also constantly on the toilet, and constantly vomitting. I didn't see the link.

Went to the doctors. They did some simple tests.

I now avoid dairy, and I am perfectly healthy. My parents still think I exaggerate.

Not exactly tricked, but... I had a coworker with a severe dairy allergy (had to carry an epipen and everything). She was leaving the company, so on her last day I brought in a huge batch of vegan brownies. Typically when I make that recipe I use soy milk, but I had another coworker (B) who had a soy allergy, so I used almond milk instead. Coworker B took one of the brownies after confirming with me they were totally soy free, but came back about ten minutes later, asking if I was sure there was no soy in the brownies. She was clearly having a reaction, so I panicked and started listing off all the ingredients I used in the recipe. When I mentioned the almond milk she said, "Oh, okay. Yeah, I'm allergic to almonds, too." She ended up going home for the rest of the day, and I am still baffled that someone with allergies that severe wouldn't verify the food she was eating was free of all her allergens.

My own Father. I'm allergic to mushrooms, he didn't think that was possible.

One weekend day when I was 14 it was my turn to cook dinner. I made bolognese sauce and left it to simmer on the hob while I went out to play with the dogs. Whilst I was out he secretly cooked a few mushrooms, liquidised them, mixed them into the sauce, then hid all the evidence. You couldn't see them, smell them, or taste them. I ate the dinner, and when two hours later my guts began to protest I was so confused, I made the sauce myself! There was nothing bad in it! Everyone else is fine! It wasn't until the next morning (after everyone had to listen to me emptying my entire digestive system all damn night) that he finally admitted what he had done. It felt good listening to my mum shouting at him for hours, and she made him scrub the entire bathroom with a toothbrush once I was finally out of there.

I'm allergic to avocado. A lot of people think I'm lying because I don't like it. Guacamole is delicious, but unfortunately makes me violently ill. My sister in law thought I would "change my mind" if I had avocado in the right context. She gave me a burrito with guac which I stupidly ate by the campfire so the green avocado color looked like queso. I vomited. A lot. For a long time.

I'm allergic to coconut. None of my friends believed me and thought I was just bullshitting them and that I just didn't like coconuts. They bought a chocolate cake and a "vanilla" cake for my friends birthday. We all got to chowing down and when I bit into the "vanilla cake" I immediately recognized it as having coconut. I spit out what I hadn't swallowed but it was too late. Throat started closing, mouth started burning and tingling and my saliva became extremely thick and stringy. My friends reactions were just "Oh. I guess you're not lying". I flipped them off then slowly sipped water for 2 hours while I waited for my face to stop itching.

My wife, who is an otherwise supportive and wonderful partner, refused to believe I have an allergy to pistachios. She said it's because I am too nonchalant about diving into a bowl of nuts then later asking if there are pistachios but at this point I kinda just know from glance if there are.

Anyhow, we were at a nice place for lunch with her family and ordered a meat and cheese board. I didn't even consider that a pate would have pistachios until my second bite and I saw them. My wife, slightly "justified", said "see, you aren't allergic!"

Thirty minutes later I was in the emergency center, my entire body broken out and trouble breathing and swallowing and she was crying. I was trying to calm her down while attempting to swallow and not die, feeling if I did pass I didn't want her thinking it was her fault. One giant shot in my buttcheek and a very calming nurse helped out.

She later got mad that I didn't carry an EpiPen with me but, she forgets, I am a dummy when it comes to that stuff.

I have a strange allergy that most people don't believe. I'm allergic to mint/menthol. Anything that is supposed to give you that nice "cooling" sensation just feels like burning fire and makes me swell and itch (no anaphylaxis, but just really uncomfortable). Its in toothpaste, facewashes, deodorant, candy, hair products.

I had a friend, and as young teens do, she decided to wash my hair and give me a sleepover "spa day" sort of thing. We washed each others hair in the kitchen sink, cucumbers on the eyes, candles going. She has heard me many times say I was allergic, so I decided to trust her. But, without telling me, She decides to use her mom's fancy peppermint shampoo thinking it wouldn't be bad.

Suddenly, relaxing spa day turned into a Michael Jackson Pepsi commercial. Next thing I know I'm writhing around trying not to tear my scalp off while I'm screaming at her "what did you do?! What's in this?!"

She kept telling me that is was good stuff and her mom uses it all the time! Moms never had a problem.

The remainder of spa day was spent with my head running under cold water until the benadryl kicked in. I also get adverse reactions to benadryl so instead of sleepy I get HYPED. The rest of that sleepover was me sitting like a 16 year old on cocaine trying to watch a movie by pacing back and forth behind the couch patting my thighs to the beat of everything that was happening in the movie.

Not a fun sleepover

I know it's popular to hate "gluten free" people right now, but I legitimately cant consume gluten because I have celiac disease. There's definitely a threshold for my allergy but I'm not totally sure where the line is. I'm usually fine eating, for example, fries from the same fryer as onion rings, but if I eat an actual piece of bread I'll get headaches, stomach aches, and probably throw it up.

Anyways, the summer after high school my friend got me a job at this Mexican restaurant she worked at. Everything came in bagged/frozen except the green chili which we made in house. Every time I start at a new restaurant I make it a habit to learn what allergens are in what dishes because I take that shit seriously, and I also want to know what I can eat safely. This restaurant had all ingredients and allergens for everything listed in a binder so I read through it and saw that the chili was actually gluten free.

Every day at work I would get a plate of rolled chicken enchiladas on corn tortillas smothered in green chili, but after a few days I started feeling sick. It started with headaches, then stomach cramps so bad I had trouble focusing at work. I messed up orders, had to constantly take breaks, and generally was miserable. In the middle of the night or in the mornings I would wake up throwing up, but this being the restaurant industry no one would let me call in sick. Eventually I threw up in the bathroom while at work and they sent me home. I was out for two days, but I couldn't figure out what had made me sick because I'm careful about my groceries and everything I had eaten at the restaurant was supposed to be gluten free.

When I got back I was talking to my friend (who by the way had not checked up on me at all) about how confused I was with the whole thing and she starts f-cking laughing. Turns out she didn't believe I had a real allergy and thought it would be funny to prove I was faking it, so she got the cooks to add flour to the chili. Obviously I was f-cking pissed, she had essentially poisoned me and who knows how many other people by adding the flour. What is wrong with people?

With me I didn't develop any allergies until I hit 21. I can remember grabbing a bag of peanut m&ms and within a min I knew something was wrong. I had never had a reaction so it was really scary and unexpected. I was tested and did in fact develop peanut allergy on top of a few others. My family and bf didn't understand that it is possible to develop allergies later and life. So they would push peanuts on me as if I was lying. I loved peanuts wtf would I lie. Just a few months ago am idiot coworker made brownies. Said no peanuts. Yup there were peanuts. It's scary and people shouldn't take it lightly

I have some pretty wacky allergies when it comes to mold and fungus, so I can't eat mushrooms. Because of this I'd never been exposed to green bean casserole, which uses cream of mushroom. My roommate asked me one day if I liked mushrooms, to which I replied I was allergic. She asked me if I was just saying that because I didn't like mushrooms, and I told her I wasn't. People with food allergies get that question a lot, so I didn't think anything of it.

This b-tch proceeds to serve me green bean casserole, and long story short I wind up in the ER with my entire body feeling like it's being bitten by bloodthirsty mosquitoes. Needless to say, I moved out, and didn't pay her a dime for rent or utilities. I told her she was lucky I didn't sue her or call the police. Looking back, what she did was tantamount to attempted murder.

I am allergic to a couple of exotic fruits from my home country and to some cleaning products. There is a housemaid who has worked for many years for my family and I adore her she's pretty much like family now buuuut she never believed that I was allergic to these things.

She thought it was just me being complicated, so more than once she didn't bother to tell me the juice she made had the fruits I was allergic to. Luckily my allergy to those fruits it's rather mild and aside from a red face and a burning sensation on my face nothing happened but still.

What annoyed me the most is that more than once my mom gave her the money to buy specific products that we knew wouldn't give me allergies and she refused to buy them claiming that other products were cheaper and that she was just helping us to save money. At this point she was just being a stubborn! My allergy to cleaning products is heavier than the one to the fruits. I normally sneeze and cough a lot, get red, feel a burning sensation, get itchy and my eyes get extremely blurry but she still thought I was playing. Eventually my mom had to tell her off and she started buying what we told her to buy.

I'm celiac, so I can't digest gluten. This causes hives, eczema, vomiting, bloating, acne, alternate sh-tting my brains out and painful constipation, and being in a mental fog for up to several weeks after exposure, because basically my small intestine is eating itself and all of my antibodies are attacking everything. Because it's currently trendy to eat a gluten-free diet but the majority of those people don't have a gluten allergy or intolerance, a lot of people don't take it seriously. People think they're doing a favor by lying to me about whether something has gluten in it or not, or saying "just a bite won't hurt!" but it really f-cking will. I can't even count the number of times people have glutened me because they think I'm on a trend diet. It's not a f-cking joke.

I'm allergic to limes. Other citrus doesn't bother me- just limes. I'm a bartender and so things suck sometimes but I'm usually okay. My allergy developed after I had started bartending. At first it was just a mild skin allergy but I could still drink it. Then it started getting worse. I'm at a point now where even a small sip of a drink with lime will set off a reaction in my throat. It burns- very badly. And the hives. My god, the hives.

I usually have to remind friends and family when they're trying to make me drinks because it's not a common allergy and I'm almost always okay.

I can't have my favorite drinks anymore when I go out because most places don't have the ability to make me a margarita with lemon instead of lime. (Most pre mix their juices or whatever, maybe they're lazy and just don't want to do it) Fine, it's not a big deal, but I always ask anyways on the off chance that they can.

It's not really just that though- I can't trust people at other restaurants and bars anymore. This one told me she could make a margarita with only lemon- I super stressed I can't have sour mix or anything- it MUST only be lemon. She said it was no problem because they had fresh squeezed juices and it was easy to accommodate me. She f-cking used sweet and sour mix and when I started drinking it, I took a big sip and could tell immediately when it hit my tongue. She had a smug look on her face until I started reacting right there. My boyfriend raised f-cking hell while I was trying to get the reaction to stop.

I should have pressed charges but didn't because I was younger then and felt like her being fired was enough. I still wonder every so often whether or not she learned her f-cking lesson.