Stainless steel cookware is a great selection for safe cooking. Many kinds of cookware react with the foods, whether changing the taste of the food or even releasing harmful materials into the food that can cause imbalances or diseases. Many non-stick coatings like teflon are safe - but once they get scratched or overheated they can start to leak chemicals in the food that are according to some scientific studies dangerous and maybe carcinogenic.
Stainless steel cookware is very safe. Stainless steel is a mix of distinct metals: iron, chromium and nickel. Iron, as you are probably aware of is not a dangerous metal for the human body - one of the wholesome aspects of spinach for example is that it has a lot of iron.
Chromium also is wholesome for humans - between 50 to 200 (microgram) mg per day are recommended. Studies have shown that when you cook one meal in a stainless steel pan or pot it releases about 45 mg of chromium into the food - so that's even less than what's recommended daily, a very safe amount of chromium. That means even if you eat four meals a day that are all cooked in stainless steel pots and pans you would still be in the safe range, since 4 times 45 mg equals 180 mg (less than the daily 200 mg that are totally fine).
Cookware
About nickel - nickel in effect isn't something that you want to put in your body. Fortunately when you cook with stainless steel cookware there is very dinky nickel leaking into the food - so dinky that scientists and healing professionals reconsider it in effect safe. The only people to whom the nickel might pose a threat are people who have nickel allergies. If you have a nickel allergy I suppose you already talked to your doctor about that. Since stainless steel cookware is used in so many social places (restaurants etc.) I suppose that it still is regularly not that big of a threat, but again, check with your doctor.
To some this might all sound a dinky weird and they might be surprised that when they cook part of the cookware also gets into the food. But this is in effect normal, it's the world we live in. You drink from a can and some tiny amounts of the can material will get into your drink. You drink from a bottle and some tiny amounts of the plastic get into your drink. When you cook there is heat complicated which enforces reactions between distinct materials. This is nothing bad - remember that we human beings are designed to live in this world and to deal with these kinds of things.
When you buy high potential cookware you can be pretty sure that it is safe to use - cause all these big brandname manufacturers have a prestige and they don't want to risk lawsuits. Of course if you buy cheap noname cookware that's a distinct case - which is one of the reasons why I all the time choose high potential cookware.
Safe Cookware - Is Stainless Steel Cookware Safe?