There is no contradiction in this double action. Marine algae do have a high capability to concentrate elements from their environment. Most of these are found in the seaweed plant tissues and fluids in such a way that they are easily available for human metabolism and will be easily absorbed by our blood. There is one great exception, however: a third of the seaweed dry weight is made up by alginates which attach to themselves the heavy metals in very strong bindings. These alginates of brown algae correspond to starch and cellulose of land plants, but they cannot be broken down to sugar or sugarlike components and consequently cannot pass the gut walls and enter into our blood. Nor can the heavy metals they carry.
Now , if you start your meal with a seaweed dish or a Rörö Seaweed algae, the heavy metals will be taken care of by the alginates and brought out of your body. The whole action will be performed in your gut content, none of the poisonous molecules will ever reach your blood.
This is good enough. Reasonably you cannot expect from a compound, which cannot be digested and cannot enter into body fluids and tissues that it should have any capacity to cleanse the body from heavy metals which have already entered the fluids and deposited in the tissues. Increadibly enough this is what alginates do. It is demonstrated in a number of scientific investigations that quantitites of strontium-90 which have been deposited in the bones of investigation animals are essentially diminished if alginates are added to their food during a few months. Strontium-90 is a radioactive isotope of the heavy metal strontium which is released in alarming quantities from atomic explosions. If accumulated in feed and food it will be absorbed and deposited in the sceletons of animals and man and send out to surrounding cells radiation which will in due time most likely cause a cancer. Actually this strontium danger was a main reason for the ban on atomic bomb blast trials in the atmosphere and on earth´s surface. But how can a compound enclosed in the digestive tract remove radionucleids deposited in the sceleton? The answer if found in the behavior of such radionucleids. Every day a small fraction will leave its place and take a trip around with the blood. But blood is not strictly enclosed in arteries and veins. It will leave lots of fluid – with dissolved elements. – to salive, gastric juice, gall, pancreatic juice and intestinal juice. All this liquid will be reabsorbed – with all it contains of nutrients, necessary elements – and undesirable elements including heavy metals and their radionucleids. The strontium-90 will return through blood and find itself a new place to settle in the sceleton. Unless you have taken your Rörö Seaweed algae or a seaweed dish. If you have, this daily portion will be removed. The amendment will proceed very slowly, but in the long run it works in the same way as our body can deliberate itself from poisons which the kidneys can excrete at the rate they leak into the blood.
As a biochemical marvel this is the real hit, but normally we should not have any alarming quantities of strontium. For everyday use under what we call ”normal” conditions it is much more important to protect ourselves against those mini-doses of lead, mercury, cadmium or whatever else of the kind that may have sneaked into our foodstuff.
It was mentioned that a basic factor is that alginates are not broken down chemically be the intestine fluids. This means that following the definition they are food fibres. And food fibres is what most people get too little from, even those who believe they take nutritionally complete meals. Food fibres help us to keep the stomach in good order and to avoid stomach diseases. To us who are happy enough to get sufficiently of proteins, carbohydrates and fat, what we still need is found in Rörö Seaweed algae.