Sea salt is better both taste wise and health wise.
In this country, people (including medical doctors, nutritionists, and dieticians) are brainwashed into thinking that salt is nothing but sodium chloride, all the way from kindergarten to medical school, that all salt is the same, created equall, that there is no other "salt" available in the USA-- it's all the same, so this rules the thinking. When people are saying sea salt doesn't make a difference, they are actually making an assumption, not a statement of true fact. Even more so, all US studies on salt have been done with commercial table salt. When people talk about salt. They overlook completely that there are 84 buffering elements in most sea salt to protect the body (and other organisms like fish) from the harshness of sodium chloride in its pure, harsh state. Salt is not just trace minerals, it is a lot more, way more. There is bio-electric energy in salt (yes, a small amount that some say is negligible); there is magnetism (almost unmeasurable, but still there); there are vital and inert gases, such as helium, neon and argon; plus there are micro-organisms; there are micro-minerals in salt that aren't found in most foods and are poisonous in large quantites BUT that the body uses and needs (scientifically proven to need) in the smallest of quanties, quantites that sea salt delivers safely. Sea water is a complex chemical soup, containing 84 of the 103 known elements. Nature had a purpose in making our blood like the ocean (where sea salt comes from...). In the ocean, sodium is buffered. In our blood, the sodium is buffered. And in our diet, the sodium should be buffered as well... table salt isn't buffered. A similar concept is well understood with other nutrients (ie: buffered vitamin C is more absorbed and effective than non-buffered)- buffering makes a difference in most cases. Furthermore, If you tried to inject pure sodium chloride intravenously via liquid, you would kill a person. He will go into shock. But if you inject a liquid salt solution with other minerals in it, it won't kill someone. This is well known in medical circles in other countries outside the US. In the 1900's, an MD did a test and put fish in a tank of water mixed with refined salt, the same concentration of salt that exists in sea water. All the fish died. If fish can't live on pure sodium chloride in dilute concentration, how can we? Nature is telling us something here, right? Other experiments have been done on animals and humans in other countries with salt restriction and intake and on sea salt, unfortunately American doctors can't and don't read clinical studies that are written in other languages and are very hard to access. Most wouldn't care because to them, their current knowledge is alreay correct and the study has to be a published American study.
Furthermore, reducing table salt intake isn't a full proof way to lower blood pressure. Low salt diets can actually cause higher blood pressure, especially in cases when people have electrolyte imbalances. There are some MD's in other parts of the world who are well aware of this and will ask people with high blood pressure what kind of salt they are consuming. And if regular table salt, they suggest natural sea salt. People who use sea salt have the tendency for more normal blood pressure-- this is not based on studies but from experience from other naturopathic doctors and MDs in other countries who I know who regularly monitor their patients diets in large depth (yes, down to what kind of salt they use). Anyway, when the heart has much less of a fuel (salt based electrolytes) for contraction it becomes weaker, slightly, and the body will raise the pressure by restricting the arteries. If you have a regular mechanical pump that doesn't work well, or has a slow leak, you have to reduce the diameter of the vessel through which the liquid is being pumped to keep the liquid moving (and blood from clotting). In this case, we are talking about blood. So, to compensate for a weak pumping action by the heart, the body compensated by increasing the pressure in the arteries. Lots of other things are happening as well. On a low-salt diet, not only is the heart working harder, but so are many of the other organs as well. Nature put 84 elements in salt, as a buffer, to protect you from pure sodium chloride. There's a reason why lowering salt intake does NOTHING to a large percentage of people's blood pressure, hmm I wonder why. And there's a reason why salt restriction would lower people's blood pressure-- because the chloride in salt throws your electrolyte balance off. One other reason for high blood pressure is because people don't consume enough plant based antioxidants and nutrients (which help keep the heart strong, lowers cholesterol, and balances blood sugar, improves digestion).
Sea salt is not "bad"; sea salt is different than table salt. I don't care what other "experts" will say. What they are saying is assumption based, not based off of scientific studies which they'd agree there are none on sea salt-- so why believe someone who is making an assumption? From my experience and other doctors I know who closely monitor patients diets and take blood pressure and heart rate at evey visit, people who consume generous amounts of sea salt and eat a healthy diet consistently have a lower/normal blood pressure than those who eat healthy but consume table salt in moderate amounts. I'm not claiming what I say to be scientific study based, but the clinical and anectodal evidence amongst my colleagues (and studies done in other countries) are enough for me and other naturopathic doctors and MDs in other countries to recommend sea salt to patients.
I hope this helps provide a different, opposing viewpoint.