It depends.

What kind of tuna is it? Chunk white is different from chunk light.

There are two main kinds of canned tuna: chunk light and solid or chunk white (albacore). All canned white tuna is albacore. Its mercury levels are almost three times higher than the smaller skipjack, used in most canned light tuna.

How much is a “little tin”? 1 oz.? 3 oz.?

Men can safely consume 14.5 ounces of light tuna per week, and women can consume 12.5 ounces per week—unless they are pregnant in which case it is best to avoid eating tuna.

Here is an article/discussion on eating tuna every day.

SkipJack tuna 90 grams

^^^ 90 grams is just over 3 ounces. So treat yourself to five times a week, and you should be fine.

Better to eat salmon though. You can get similar salmon kits.

A better question: why are you needing a snack if you follow the nutritional guidance people have offered you in response to other questions?

@zenvelo I obviously didn’t find the other answers helpful if I didn’t follow them. I get stressed out trying to please everyone. I am mildly ticked at you for putting pressure on me to follow all advice. I will look into the salmon kits later. Thanks for answering the question.

http://www.medicalnewstoday.com/articles/306246.php
specific warning about mercury and scale shows ages and amounts to consume safely.
For a man 150 lbs or more every nine days is sufficient…not every day. Look at the side effects stated on this link! Wow! scary.

@zenvelo I called clover leaf and they say its fine to eat one per day.

You shouldn’t because of mercury.

@JLeslie Seems that there isn’t a clear cut answer.

Why risk it.

@JLeslie Because I’m hungry at nights and a $2.50 kit is cheaper than buying a pizza or starving after the pizza store is closed. Apparently every thing that we eat has a down side. I’m looking into back up food that could be eaten regularly. I have cliff bars and tuna kits and sometimes rotisserie chicken for mid night snack while I listen to my radio show at 1am – 5am.

@RedDeerGuy1 Why don’t you eat some fresh fruit or a salad of fresh vegetables as a snack? Have some celery or an apple with peanut butter or almond butter? There are a lot of food choices that do not have a downside.

@zenvelo I have , but didn’t mention that I have bananas and avocadoes. To keep stocked up on perishables like fruit and veggies keeps daily trips to the supermarket that I’m not prepared to do just yet. I bought a veggie tray and it is going bad because I couldn’t find a good enough dip and didn’t want it. I might buy a beef and broccoli plate from the restaurant next door later tonight. My doctor wants me to buy more cheap food from the next door Chinese restaurant. All of your suggestions, celery or an apple with peanut butter or almond butter, brought forth a “yuck!” reaction to me. I only liked that food in kindergarten.

Just for the record….I think you are doing great @RedDeerGuy1 . You don’t need to please anyone here. Keep working on yourself and you will be fine.

In terms of human diet and lifestyle, and considering the various habits we have which include sexual proclivities and exercise (or more likely, not exercising), depression, solitude and other emotional aspects of life… mercury poisoning from over-consumption of tuna (whether canned or fresh) is probably one of the least likely things to damage your health. This is not to say that you should ignore it, or that it doesn’t exist, only that it probably isn’t a major concern for you.

You’re more likely to be injured or killed in an auto accident (or as a pedestrian victim of an auto accident) than from a lifetime accumulation of mercury from eating tuna. I also don’t mean by that statement that you should sit on the couch watching television all of the time – while eating tuna on crackers – and never go outside again.

All things in balance.

Enjoy your tuna on crackers. But then get out and take a walk, too. And meet a girl and kiss her, even though that is probably the riskiest thing you will ever do. Still, do it. What’s the point of living if it’s not to take an occasional risk, and live to tell about it?

Besides, the carbs in the cracker are far more dangerous to you over time than the mercury in your fish.

I buy frozen pizzas that are 2 for $10 or 2 for $12. Half a pizza is probably the same calories, or more, as a Tuna sandwich. Basically, the same price. Pasta and sauce, salad, ramen with veggies, soup, there are lots of things that can be just as cheap.