0:16 Next we move on to the third uh macro mineral which is nothing but magnesium. According to the World Health Organization, magnesium is an essential macro mineral and a co-actor for about over 300 enzyatic reactions in the human body, including energy production, protein synthesis, DNA and RNA synthesis, muscle and nerve function, blood glucose control, and bone development. It is the fourth most abandoned mineral in the human body. So if we uh talk about magnesium its total body content is 25 gram in adults about 60%age in bones and 38%age in muscles and soft tissues. Uh only 2% is seen in extracellular fluids and the blood level
1:03 of serum magnesium is about 1.7 to 2.2 mg per dl and it's not a reliable indicator of total body uh magnesium in the intracellular level. The second most abundant intracellular cation after potassium is the magnesium which is bound to the ATP. The key relationship includes about u magnesium ATP complex is most ATP requiring reactions actually use magnesium ATP as a true substrate. The deficiency includes hypomagnesmia uh causing muscle cramps, tremors, uh cardiac arhythmias, hypertension, insulin resistance and very common in diabetic population. Functions of
1:49 phosphorus include uh magnesium include enzyme co-actor as more than 300 enzymes uh include magnesium as a co-actor. Under energy metabolism, uh, magnesium ATP complex is a true substrate for all ATP requiring reactions, especially with regard to glycolysis, crep cycle and oxidative phosphorulation. DNA and RNA synthesis is also being uh involved by the magnesium and they form a major co-actor for DNA polymerase and RNA polymerase. When it comes to protein synthesis, they they are required for ribosome structure and function essential for translation of mRNA and thereby into protein synthesis. Calcium
2:36 triggers contraction. Magnesium will promote relaxation. So always magnesium has an antagonistic effect to calcium at the m muscle level. Similarly, the deficiency would lead to tetany and cramps just like calcium. Nerve function is also regulated by magnesium where we can find that they regulate the calcium channels and they modulate the nerve exitability. Uh magnesium forms a major component of bone mineral matrix influencing the osteoblast and osteoclast activity with bone magnesium is exchangeable with blood. blood glucose control. Uh this forms as a major co-actor for insulin receptor thyroin kynise which is essential for uh
3:22 insulin signaling and the deficiency worsens the insulin resistance. Uh cardiac rhythm is also being maintained by u magnesium where hypomagnesmia will cause a fatal uh ventricular ariththmias. Magnesium is also uh important for and as an anti-hypertensive where we can see that it relaxes the vascular smooth muscle for uh with low calcium linked to it. The mechanism of dietary magnesium uh is in uh three different forms where we can see that uh dietary magnesium is absorbed in the small intestine and they are being transported and then they enter the cell binding the ATP.
4:08 First mechanism is magnesium forming ATP complex and uh the second mechanism is it helps in the muscle relaxation. So where calcium is uh involved in contraction, magnesium is involved in the relaxation process. Mechanism three is insulin signaling. So it is also involved where when there is a magnesium deficiency, there may be impaired kynise activity leading to uh insulin resistance. So the bioavailability of magnesium includes uh the absorption rate to be 30 to 40%age from mixer diet. uh vitamin D which is when it is adequate uh protein acidic pH small frequent meals are all involved in
4:55 as an enhancing factor reducing uh would be phitates oxalates high calcium high fiber alcohol and phosphates. The best sources includes green leafy vegetables especially the chlorophyll which contains magnesium at uh the center. Uh nuts, whole grains and legumes are all the best sources. When we talk about the toxicity uh hypermagnesmia is uh very much possible with only from supplements or if there is any renal failure condition. The symptoms include diarrhea which is very common, nausea, uh low blood pressure, muscle weakness and cardiac
5:41 arrest if there is a severe condition. So hypomagnesmia and hyper magnesmia are equally um important and it has to be taken care. Next, uh the food sources of magnesium include pumpkin seeds, dark chocolates, almonds, spinach, drumstick leaves, a brown rice, uh bananas, and ground nuts with about um pumpkin seeds topping the list and uh banana is least in the list. When it comes to the stability, magnesium as a mineral is not destroyed by heat. However, if the boiling
6:28 vegetables causes significant leeching into the water, using cooking water in soups and gravies recovers the lost magnesium. Milling and refining removes magnesium rich germ and brand from cereals. Next, we move on to the mineral called sodium. According to World Health Organization, sodium is an essential macro mineral and the principal extracellular cation critical for maintaining the fluid and electrolyte balance. The osmotic pressure is also being maintained. Nerve impulse transmission and muscle contraction. Also, WH recommends reducing the sodium intake to less than
7:14 2,000 mg per day, which is approximately 5 g of salt per day to prevent hypertension and cardiovascular disease. So, uh when we talk about the sodium content, 92 g uh of sodium in adult is primarily present in extracellular fluid and bone. uh the blood level of sodium is u in the range of 135 to 145 m equivalence per liter which is tightly regulated. The primary location of sodium is in the extracellular fluid. Principally they are called as the extracellular flu uh fluid cation and uh when it comes to the sodium regulation it is mostly regulated
8:00 by the renin angotensin aldoststerone system which is the raas and antidiuretic hormone regulates the sodium and water balance by via kidneys. When we talk about the Indian diet, an average Indian sodium intake is approximately 4,000 to 5,000 mig gram per day which doubles the WH recommendation. Thereby it could also be a major contributor to hypertension epidemic. The major functions of sodium includes fluid and osmotic balance. uh having the principal ECF cation which is extracellular fluid cation maintains extracellular fluid volume and osmotic pressure and the water will follow the
8:47 sodium there. Uh sodium influx through voltage gated chs will generate the action potential fundamental to all nerve signaling. Sodium also depolarizes the muscle cell membrane triggering the calcium release and initiating the contraction which is the muscle contraction. Sodium coupled core transporters absorb glucose amino acids and vitamins in small intestine. Uh when it comes to sodium bicarbonate which is the primary extracellular buffer maintaining the blood pH. Sodium determines the plasma volume directly influencing the blood pressure. uh sodium uh potassium ATPs pump maintains the electrochemical gradient pumps. Uh
9:35 about three sodium is out and two potassium is in as per the uh ATP essential for all cellular function. Sodium reabsorption drives water reabsorption in nephron critical for urine concentration. When we talk about mechanism, dietary sodium is also involved in three main mechanisms. As I said, first in the action potential and second is a renin angotensin regulation mechanism. When there is a low blood pressure, kidney will release the renin and the renin gets and the angotensin with with the help of AC which is the angotensin converting enzyme converts to angotensin 2 and this will in turn get converted uh
10:24 acts on the adrenal cortex and where aldoststerone is released. The kidney will u kidney tubules will therefore reabsorb the sodium and water uh helping the blood volume to increase thereby the blood pressure is restored to normal. That's the major regulation there and the nutrient absorption it is involved in the intestine uh membrane and it is important for nutrient absorption hydration and energy uh recommendations. So the bioavailability of sodium would be nearly 9 100% of absorption takes place from all sources. Uh it is the most available of all the minerals because there is no significant factors that reduces absorption. But when there
11:11 is excess it is def e def e def e def e def e def e def e def e def e def e def eff efficiently excreted by the healthy kidneys. The toxicity includes as hyperatriia where you can see that um it it is uh observed in various conditions like hypertension where uh increased sodium levels will increase the blood pressure thereby increasing the uh plasma volume. Uh cardiovascular condition you can see that high sodium levels would lead to hypertension thereby increased risk of heart attack and stroke. Edema condition also you can see that sodium is getting getting retained retention and water retention thereby leading to peripheral edema. Uh under kidneys you can find that there is a damage because of chronic high sodium
11:57 intake which overworks on the kidneys leading to progressive renal damage. There is an acute hyper natriia uh condition where you can find that confusion, seizures, coma and all these things have increased serum sodium greater than 150 m equivalents per liter. Even osteoporosis is f found when the high sodium levels are seen with increased uh urinary calcium excretion that accelerates the bone loss. The food sources include um table uh the table salt which is the normal salt that we normally use for cooking has about 39,300 mg per 100 g. Processed foods or pickles
12:43 has about 1,000 to 3,000 mg per 100 g. Uh bread which is commercially prepared has 400 to 500. Cheese has about high sodium which is 600 to 700 mg. Soyo sauce has about 5,600 mg per 100 ml. Natural foods like vegetables has a a range of 1 to 100 mg per 100 g. The stability of sodium includes uh it's completely a stable uh mineral not affected by heat, light or cooking. However, when we use excess use of salt in the cooking and food processing is a primary cause of excess sodium intake in the Indian diets. Next we move on to the mineral which is a major macro mineral which is called a
13:29 potassium just like sodium potassium also is rated as a important uh macromineral. It is a principal intracellular cation and it's critical for maintaining the normal fluid and electroly balance nerve transmission muscle contraction cardiac function and blood pressure regulation. WHO recommends increasing the potassium intake to at least 3,510 mg per day to reduce the blood pressure and cardiovascular risk. The total body content of potassium includes about uh 140 uh grams in adults where 98%age is intracellularly present as ICF cation and 2% in the
14:16 extracellular. In the blood levels, the serum potassium levels include about 3.5 to 5 mill equivalent per liter which is a very narrow range and it could be life-threatening if the range is outside. The ICF is to ECF ratio is 30 is to1 which is intracellular to extracellular gradient which is maintained by sodium potassium ATPs pump. The regulation of potassium is being maintained by al aldoststerone which increases the renal potassium excretion where insulin promotes the cellular potassium uptake. Acidosis shifts the potassium out of the cells. Relationship with sodium. Sodium and potassium always have opposing effects
15:02 on blood pressure. When there is high potassium, it counts a high sodium. And if there is a increasing potassium intake, it is recommended to offset the high Indian sodium intake. The functions of potassium includes uh as a membrane potential, nerve pulse impulse transmission, muscle contraction and cardiac function. Potassium is a major intracellular fluid cation. They are uh forming a grade uh potassium gradient across the cell membrane creating the resting membrane potential which is essential for all exitable cells. Potassium flex during repolarization restores the membrane to resting state after action potential
15:48 generation. It is also required for normal skeletal uh smooth and cardiac muscle activity. Hypocalemia can cause muscle weakness and paralysis. also it maintains a normal cardiac rhythm. Hypocalemia may produce flat T waves, U waves and arythmias whereas hyperc calmia may cause peaked T waves and ventricular fibrillation. Some more functions of potassium includes fluid balance, blood pressure regulation, acid base balance, protein synthesis, glycogen storage and kidney function. When it comes to fluid uh balance, they regulate the intracellular fluid volume by controlling the cellular osmarity and water distribution
16:35 and blood pressure regulation. High potassium intake promotes the uh renal sodium excretion helping to lower the blood pressure. Sodium and hydrogen exchange in kidneys contribute to the regulation of blood pH. It is also necessary for ribosomal activity and amino acid transport into the cells. Potassium is stored along with glycogen in liver and muscle tissues and is required for glycogen synthesis. The kidneys are uh functions are enhanced with regard to renal sodium excretion and may help protect against kidney stone formation. So when we talk about the dietary potassium uh mechanism, it is through uh the resting membrane potential and through repolarization and blood
17:20 pressure regulation which I was discussing uh with regard to the high potassium intake. what happens in the blood pressure and how it is getting um maintained because of the vascularization process and uh hypoc calmia can be dangerous also with regard to the heart uh waves T- waves and uh and all that. So when we talk about the bioavailability of potassium 85 to 90%age are absorbed from food are highly available bioavailable passive absorption throughout the small intestine and colon and there is no significant inhibitors excess gets efficiently excreted by kidneys in the healthy individuals.
18:06 So hyperc calalemia is being uh listed out with regard to various functions like cardiac ararithmias muscle weakness. So most dangerous are the cardiac ariththmias where we can see the T- waves are peaked there is a widened QRS verticular fibrillation and cardiac arrest and uh ascending paralysis may occur with regard to muscle weakness and from food it is virtually impossible in healthy individuals and kidneys will efficiently excrete excess. The high-risisk groups include uh chronic kidney disease patients, patients with um on AC inhibitors, potassium sparing diuretics. Acute hyperc calmia includes serum potassium levels of greater than
18:52 6.5 murren per liter which leads to a medical emergency. So the food sources of potassium include u basically dried apricots with topping the list with coconut water, bananas, potatoes, spinach, drumstick leaves, lentils, ground nuts, milk, cow's milk, orange are all in the list. Ground nuts being the next highest with 7 or 5 mg per 100 g. The stability of potassium includes potassium is a mineral and it's not destroyed by heat or cooking. When there is significant potassium leeching that takes place to the cooking water about 50%age is lost when we boil the vegetables with excess water. But this water can be used in cooking uh soups,
19:39 rasams and sambar will recover this lost potassium and this is a very common and beneficial traditional south Indian practice. Therefore, I would like to conclude that calcium, phosphorus, magnesium, sodium and potassium are essential macro minerals required for bone health, energy metabolism, fluid balance, nerve conduction and muscle function, adequate intake to a balanced diet. According to the Indian Council of Medical Research recommended dietary allowance recommendations, it is very important to maintain the normal physiological functions and prevent deficiency or toxicity. Thank you. We will go on with the next set of minerals called macro minerals are over. Micro minerals will be in the next topic. Thank you and happy learning.
20:25 >> Your body is a biological machine but it completely relies on raw inorganic elements it cannot produce itself. To survive you have to extract them from food especially the seven heavy duty elements called macro minerals. Despite the name, macro doesn't mean they are more important than other trace nutrients. It just means volume. Your body demands more than 100 mg of them every single day. That massive volume builds your physical foundation. Calcium and phosphorus literally construct your bones and teeth. While they provide structure, magnesium acts as your metabolic engine, powering internal enzyme and muscle reactions. Beyond your physical framework, macrominerals also run your internal regulatory network.
21:11 Sodium, potassium, and chloride work together to balance cellular fluids and conduct electrical nerve transmissions across your body. Finally, sulfur steps in to build essential amino acids and proteins. But here is the fundamental catch. Because your body cannot synthesize any of these seven elements, maintaining your skeletal strength and nerve function requires a consistently balanced diet. Everyone assumes calcium is just a static building block for a strong skeleton. But your immediate survival actually relies on the tiny active fraction circulating in your blood. Calcium is an essential macro mineral, a nutrient required in large daily amounts that acts as a physiological trigger. Without this circulating mineral, muscles cannot contract, nerves cannot transmit
21:57 signals, and blood cannot clot properly. When your circulating supply drops, it triggers an immediate neuromuscular emergency, a state called hypocalcemia. This sudden deficiency causes painful muscle cramps, severe spasms, and a distinct tingling around your mouth and extremities. Because these immediate nerve and muscle functions are critical for life, long-term inadequate intake forces a deadly compromise. Your body acts like a bank robber, constantly dismantling its own structural storage matrix to supply the blood. This steady drain destroys your bone mineral density, eventually driving osteoporosis and increasing your fracture risk. You can stop this cycle by prioritizing a diverse daily intake of calcium richch whole foods like sesame seeds, calcium
22:43 set tofu, and small fish eaten with the bones. But all that dietary intake is entirely useless without adequate vitamin D to unlock the body's absorption process. Eat enough calcium and vitamin D to keep your nerves firing smoothly today so your body never has to dismantle your skeleton for tomorrow. Calcium gets all the credit for keeping our skeleton strong. But there's another forgotten macro mineral we need in huge amounts. One that hardens bones but also forms the border and power source of healthy living cell. Meet phosphorus. While mostly locked away in your bones, inside your cells, it's the literal backbone holding your DNA together. It forms a protective barrier around cells called the phospholipid membrane, and it
23:30 drives cellular metabolism as ATP, your body's primary energy currency. Everyday deficiency is highly uncommon. Dangerous drops usually signal clinical crisis like malabsorption disorders or the lockdown of acid use. It also crashes if a starving patient is fed too quickly, a metabolic shock called refeeding syndrome. When phosphate drops, cellular energy and structural integrity collapse. Patients face appetite loss and extreme muscle weakness. The skeleton softens and aches, a dangerous condition called osteomalacia. Severe lack even causes profound neurological confusion. But avoiding this crisis is simple. Routine supplements are unnecessary unless
24:16 medically directed. A varied diet of dairy, lean meats, legumes, and seeds keeps your phosphate levels perfectly balanced. Phosphorus builds your skeleton, DNA, and cellular energy. A balanced diet prevents deficiency, ensuring your body's hidden engine never stalls. Why does lacking one specific macromineral magnesium trigger continuous, uncontrollable muscle spasms? It all starts right here where a nerve meets a skeletal muscle fiber firing a rapid chemical signal to make the muscle contract. But for normal healthy movement, that muscle must fully relax before the next signal arrives. Magnesium acts as a natural chemical break. It actively clears the pathway
25:01 and resets the junction so the fiber can rest. But when malnutrition or poor diet deplete your body's magnesium stores, the nerve keeps firing. But the braking mechanism is completely missing. Without magnesium to force relaxation, the muscle fiber locks into a state of continuous excitation. This physical gridlock is what causes sudden fatigue, painful cramps, and severe tremors. And this regulatory failure cascades systemwide. Without magnesium, energy production stalls and bone health degrades. And you can even develop dangerous abnormal heart rhythms. Preventing these systemwide misfires requires actively restocking your body's magnesium reserves. So to keep your chemical breaks working,
25:46 maintain a very diet of whole grains, nuts, and dark leafy green. Chugging plain water during a marathon or a stomach bug seems like the ultimate healthy move. But overdoing it can trigger a dangerous fluid imbalance that rivals severe dehydration. This paradox comes down to sodium, an essential electrolyte living in the fluid outside your cells. Here, it acts as a microscopic manager, physically pulling water to maintain blood pressure. Simultaneously, it provides the vital electrical charge your nerves and muscles need to fire. When you rapidly lose fluids from heavy sweating or illness and only drink plain water, you aren't just rehydrating, you are dangerously diluting your blood sodium, a condition called hyponetriia.
26:31 Without enough sodium holding water in the bloodstream, the excess liquid rushes directly inside your cells. They swallow like balloons, causing your body's delicate cellular electrical grid to misfire. This dilution causes muscle cramps, confusion, and in extreme cases, life-threatening seizures from brain swelling. Because normal diets filled with breads, cheeses, and processed foods already contain ample sodium, preventing hyponetriia isn't about routinely eating more table salt without a medical need. The overhydrated runner didn't need a handful of salt. They just needed to stop drowning their electrical system in sodium gets all the spotlight, but its negatively charged partner does exactly half the heavy lifting. Meet chloride, the hidden macro mineral strictly maintaining your fluid balance
27:17 and keeping your digestion running. As the primary negatively charged electrolyte outside your cells, chloride strictly regulates your body's fluid volume and acid base equilibrium. It is also a fundamental building block for hydrochloric acid. Normal stomach digestion literally depends on it. But this delicate balance is easily broken. Deficiencies rarely come from a bad diet. Instead, massive fluid loss from prolonged vomiting, chronic diarrhea, or intense sweating drains your physiological reserves. This dangerous state of low blood chloride is known as hypocchlormia. Without enough chloride, the system crashes. Your muscles cramp, profound fatigue sets in, and severe dehydration takes over. In extreme cases, patients
28:04 even experience difficulty breathing and severe neurological confusion. To restore the balance, address the fluid loss and consume everyday dietary sources like standard table salt, cheese, and pickled foods. The clinical loop is simple. Chloride maintains your fluid and stomach acid. Rapid fluid loss triggers hypocchlormia, but simple electrolyte hydration and a balanced diet restore the equilibrium. Sulfur is an essential mineral, but an isolated sulfur deficiency is basically unheard of. Unlike iron or calcium, your body never manages its sulfur supply on its own. Instead, it relies on a standard protein richch meal, like a single cooked egg. Your digestive system doesn't absorb raw elemental sulfur from this egg. Instead, it breaks the eggs
28:50 proteins down into their individual molecular building blocks, amino acids. Notice that locked physically inside two of these specific blocks are tightly packed sulfur atoms. We call these sulfur carrying blocks methionine and cyine. Your cells string these floating amino acids together to build resilient tissues like skin, hair, and nails. But a loose chain of molecules isn't strong enough to hold a rigid shape. To fix this, the embedded sulfur atoms from different parts of the chain reach out and lock together. This forms an indestructible chemical bridge called a dulfide bond, permanently securing the protein's 3D structure. Because sulfur's entire biological job is bound within these protein structures, a sulfur deficiency only happens during severe
29:37 protein malnutrition, showing up as muscle wasting and weak tissue repair. So, when you look back at that single simple cooked egg from the very beginning of this process, it automatically delivers all the prepackaged sulfur your body could ever need to permanently lock your growing tissues together.
