In terms of nutritional value, cooked fresh tomatoes generally have lower levels of sugar and greater amounts of Vitamin A than canned varieties. On the other hand, canned tomatoes usually contain higher amounts of lycopene (an antioxidant) because processing makes lycopene more bioavailable.
Canned tomato varieties also tend to maintain their colours much longer than fresh tomatoes. This is because during processing, the skin of the tomato is removed, which creates a cleaner appearance and allows the rest of the fruit to retain its natural colour and texture better over time. In conclusion, as referred to in previous posts, tomatoes have become a mainstay of every person's diet because of their great flavour and versatility. No other vegetable provides the same health benefits, nor can any other vegetable match tomatoes for taste and cooking versatility. It is logical that you should use both types of tomatoes regularly.
Unlike canned tomatoes, which retain their nutrient content throughout the processing cycle, tomatoes harvested under-ripe (early), and shipped long-distance (overseas) will have lost some nutritional value by the time they arrive at the customer. In contrast, canned tomatoes are typically processed within hours after harvest, preserving all nutrients, including lycopene. During canning, heat processing increases the bioavailability of lycopene; therefore, when compared to fresh, raw tomatoes, the body absorbs lycopene more readily from canned tomatoes than it does from fresh, raw tomatoes.
Tomatoes are best enjoyed fresh when in-season; they have excellent bright acidity, sweetness, and varying textures based on the cultivar. Off-season fresh tomatoes tend to be bland and watered down. Conversely, canned tomatoes provide consistent flavour with their sweet-acid balance; therefore, canned tomatoes are particularly well-suited for sauces, stews, and curries where tomatoes are used as a primary flavour component and cooked over long periods of time.
Cooking fresh tomatoes causes them to break down into an unpredictable structure due to the high moisture content found in fresh tomatoes. This can affect the way they cook and how long it takes to cook them. Canned tomatoes are pre-peeled, partially broken down, and typically contain less water than fresh tomatoes. Therefore, they will incorporate more evenly and quickly into recipes, and their thicker texture allows for less reduction time. For this reason, canned tomatoes tend to be used more often for recipes that require a quick cooking time, along with depth and body.
The speed of canned tomatoes is one of the most beneficial practical aspects of using canned tomatoes in cooking. There is no need to wash, chop, blanch or peel, so the prep time is greatly reduced. Canned tomatoes make perfect sense for large-batch cooking. They also help ensure consistent results on weekdays when time is at a premium. Fresh tomatoes require a high level of preparation before they are ready to be added to your dishes, especially when a smoother sauce is desired, and the skin and seeds must first be removed.
With fresh tomatoes, there is full control over added ingredients, such as salt and preservatives, and this is appealing to cooks who do not wish to use processed foods or who have concerns about their sodium intake. In addition, canned tomatoes often contain salt and calcium chloride added to maintain firmness; however, low-sodium options are widely available. So, even with the possible added ingredients, it still may save a lot of time compared to the more time-consuming prep involved with preparing fresh tomatoes.
When locally sourced and in season, fresh tomatoes are typically quite cheap and very good. However, due to growing demand, fresh tomatoes are much pricier in colder months, and the taste is often diminished. Canned tomatoes, on the other hand, remain a great value year-round for people on a budget and are a pantry staple. Because they do not spoil as quickly as fresh tomatoes, canned tomatoes are a great resource for those who want to cut down on food waste.
Fresh tomatoes shine in salads, salsas, chutneys, and in general use when the appearance of the tomato is as important as its actual taste. Canned tomatoes excel in soups, sauces, gravies, and when a recipe is slow-cooked or requires consistency, depth, or a quick cooking time. Instead of deciding based on habit, to use either canned or fresh tomatoes, choosing based on the recipe will create superior results.
Canned and fresh tomatoes have different but equally important places in the kitchen. Fresh tomatoes lend themselves to seasonal cooking with very little preparation time, whereas canned tomatoes will produce a consistent flavour, give you an increased amount of available lycopene, and will generally save you a considerable amount of time. The choice of which tomato is the "healthiest" or "best" is based less on the tomato itself and more on how, when, and why you will use them.