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Sunday, May 10, 2026

4 Sneaky Signs You’re Not Getting Enough Zinc

Key Points

Zinc supports immunity and wound healing; deficiency may cause frequent illness or slow healing.

Animal-based sources include oysters, beef and turkey, while plant-based options need careful planning.

Too much zinc can harm copper absorption; consult a professional before adding supplements.

We hear a lot about macro-nutrients (carbohydrates, proteins and fats) when it comes to overall health, but micronutrients (vitamins and minerals), though needed in smaller amounts, can be just as impactful. While vitamin D often gets the spotlight, other under-the-radar nutrients, like zinc, plays a critical role in keeping your body functioning at its best (and not just during cold and flu season.)

“Zinc is an essential mineral that plays a role in immune function, wound healing, metabolism and cellular repair,” says a Dr. “It’s one of those behind-the-scenes nutrients that has a major supportive role.”

So what happens if you’re not getting enough? We asked experts to break down the subtle signs of zinc deficiency, plus, how to get more of this key nutrient into your routine.

1. You’re Getting Sick More Often

If you’ve been feeling rundown or seem to catch every cold going around, low zinc intake could be one piece of the puzzle. “Frequent illness can be a sign you’re not getting enough zinc,” says a Dr. Because zinc plays a central role in immune health, helping keep your body’s defenses strong, if you’re not getting enough of it, you may be more likely to catch that new bug floating around.

Zinc supports various layers of immunity. Not only does zinc help activate key immune cells, like natural killer cells, neutrophils and macrophages, it’s also necessary for proper T-cell function, antibody production and overall immune response. Simply put, zinc helps keep your body strong and protects your cells from damage caused by free radicals, aka the “bad guys” that can make you sick.

While it may be tempting to reach for zinc at the first sign of a cold (and some research suggests it can help), it’s important to take a step back and look at the bigger picture.1 “The tricky part is that zinc deficiency symptoms can overlap with other health concerns,” a Dr. notes, “so it’s important not to jump to conclusions without a full assessment.”

2. Your Wounds Take Longer to Heal

If that minor cut or scrape seems to be lingering longer than usual, low zinc intake could be a factor. " Zinc plays a role in skin integrity, so if you’re not getting enough, you may notice wounds take longer to heal,” says a Dr.

Zinc is essential for protein and DNA synthesis, both critical for repairing and regenerating skin after an injury.1 It’s also highly concentrated in the outer layer of the skin, where it helps regulate inflammation and supports normal skin cell function.2 When zinc levels are low, these processes can become less efficient, which may slow healing and impact overall skin health.

3. You Experience Changes in Taste and/or Smell

If you’ve ruled out an infection but your sense of taste or smell still isn’t back to normal, it could be worth looking at your zinc intake. “Changes in taste and smell can be a sign that you’re not getting enough zinc in your diet,” says Cording.

Zinc supports taste and smell through its role in DNA and protein synthesis, cell growth and cell signaling.1 One key player is the zinc-dependent enzyme gustin, which is directly involved in taste perception. In fact, studies have found low gustin levels in patients experiencing taste challenges. Because zinc is involved in numerous enzymatic reactions, not meeting recommended intakes can impair the functioning of taste and smell pathways. Clinical research has also shown that in patients with taste disorders linked to zinc deficiency, supplementation can help restore taste, highlighting how essential this mineral is for sensory health.

4. You Experience Thinning Hair (or Hair Loss)

Hair thinning can happen for many reasons (we’re looking at you, postpartum hormones), but zinc deficiency is another factor to consider. This tiny yet mighty mineral is essential for overall cell health, including DNA and protein synthesis, cell signaling and cell division, all of which are critical for hair growth. Zinc also plays a key role in growth and development throughout the lifespan (hair included). In fact, specific zinc transporters, like Zip10, are found in the outer root of hair follicles and help support hair growth and maintenance. When your zinc intake falls short, it can impact the health of your hair and slow new growth.

Ways to Increase Zinc Intake

Most adults need 8 to 13 milligrams of zinc per day, depending on age, sex and life stage. A Dr. explains that because the body doesn’t store much zinc—only about 1.5 to 2.5 grams in skeletal muscle and bone—it’s important to get zinc regularly through your diet. Certain groups are at higher risk for deficiency, including older adults, people with gut conditions, pregnant or breastfeeding women and those following vegetarian or vegan diets. But even if you don’t fall into one of these categories, you could still be at risk if your intake is low.

With this in mind, consider these tips from nutrition experts to add more zinc into your daily routine.

Animal-Based Zinc Food Sources: A food-first approach is recommended by dietitians, encouraging zinc-rich foods like oysters, beef and pork. Other contenders for a good source of zinc include blue crab, turkey, cheese and shrimp. Eggs and other dairy products also provide some, just in smaller amounts.
Plant-Based Zinc Food Sources: There are a variety of plant-based foods that pack some zinc, with servings of fortified breakfast cereals, whole grains, pumpkin seeds and lentils providing a good source with at least 10% of the Daily Value. Other legumes, nuts and seeds also pack some, just in smaller quantities. Cording shares that “plant-based sources are not as bioavailable as animal-based, so you may need a bit more.” Bannan agrees, explaining that “since phytates can reduce absorption in plant-based zinc options, people eating mostly plant-based foods need to be especially intentional about including zinc-rich foods regularly.”
Zinc Supplement: Supplementing with zinc can be used as a safety net if recommended by your medical team. However, Cording advises to use caution when doing so since zinc may already be in other supplements, like multivitamins, immune health and bone health options, on the market. Plus, she shares, “taking zinc supplements at a therapeutic dose for too long can interfere with copper absorption, which in the long run may be doing more harm than good.”

Our Expert Take

Even if you’re eating a balanced diet, unexplained hair thinning, slow-healing wounds, frequent illness or changes in taste and smell could be a sign you’re not getting enough zinc. This essential mineral supports cell health, DNA and protein synthesis, growth and wound repair, so meeting your daily needs is key to keeping your body functioning at its best. The good news? You can boost zinc intake right at home. Animal sources like oysters, beef, pork, turkey and dairy are sources of zinc, but plant-forward eaters can still meet their needs by including a variety of whole grains, lentils, nuts and pumpkin seeds (just keep in mind that zinc from plant foods is less easily absorbed, so variety and consistency are important).

By paying attention to this often-overlooked mineral, you can help support your immune system, skin, senses and overall wellness one nutrient-packed meal at a time.

This is only for your information, kindly take the advice of your doctor for medicines, exercises and so on.

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Labels: change in taste n smell, cheese, eggs, getting sick often, heals wounds, Legumes, pumpkin seeds, thinning hair, whole grains, zinc- supports immunity

Tuesday, May 05, 2026

Fiber’s structural integrity keeps plants strong – and its indigestibility keeps your digestive system healthy

If you’re over the age of 10, the World Health Organization recommends that you consume at least 25 grams of fiber every day. The best fiber-containing foods come from plants: fruits, vegetables, nuts, seeds, whole grains and legumes.

While it’s sometimes overshadowed by other nutrients, such as protein, fiber plays a significant role in gastrointestinal health, digestion and nutrient absorption.

As a biochemist and someone who enjoys eating all types of foods, I find it remarkable that the structure of fiber, which is so similar to other carbohydrates, gives it all these unique functions. A tiny difference in the bonds that hold the molecules together allows your body to process a bagel differently from a raspberry.

Structure dictates function

In the biochemistry classes I teach, I emphasize that structure dictates function. If you’re about to cross a bridge but notice the braces are falling off or the wood is rotting, you’ll probably avoid stepping on it because the structure looks fragile.

This concept is true in the food you eat as well. The structures of the molecules that make up your food require them to be broken down in different ways in order to produce the energy that fuels your body.

Some foods contain vitamins and minerals that your body absorbs and uses for multiple functions. Other foods can keep your digestive system healthy and help your body absorb nutrients.

Food molecules consist of proteins, fats and carbohydrates. Each of these classes of food molecules has unique structures that allow your body to process them differently. For example, fats are long chains of carbon atoms that do not dissolve in water, while proteins have large amounts of nitrogen due to their amino acids. In addition, subclasses of biomolecules have even more specializations in their structures and functions.

Carbohydrate structure

Carbohydrates, or sugars, are biomolecules made up of carbon, oxygen and hydrogen atoms. Simple carbohydrates include single sugars, such as glucose or fructose, and two sugars linked together, such as sucrose – table sugar – or lactose, milk sugar. These simple carbohydrates exist mostly in rings, although they sometimes open up into a linear form.

Complex carbohydrates, on the other hand, have a lot – hundreds to thousands – of sugar molecules linked in large sheets called polysaccharides. These carbohydrates are linked only in their ring forms.

Plants connect sugar molecules in two types of polysaccharides – starch and fiber. These molecules have similar structures because they contain only one type of sugar – typically glucose – linked together many times.

However, one tiny difference in the chemical bonds within starch and fiber translates to very different functions for the molecules.

Starch, also called amylose and amylopectin, is a polysaccharide with glucose molecules that are linked using alpha bonds. Fiber, which consists primarily of cellulose, is a polysaccharide with glucose molecules that are linked using a beta bond.

The types of bonds refer to how certain parts of the molecules are oriented. These slight differences mean the two polysaccharides’ overall three-dimensional structures differ at the locations of these bonds.

The starch molecule is branched and doesn’t pack together very tightly. Plants use starch as a long-term store of glucose that they can break down to use for energy. The fiber molecules, due to their beta bonds, pack together very tightly. The glucose molecules in fiber form the support structures of a plant’s leaves, seeds and stems. The bonds of the starch enable the plants to easily break down the sugar so they can access quick energy, while the bonds of the fiber are designed to last and add strength to the plant’s architecture.

Fiber’s dietary function

The structural differences between starch and fiber mean these molecules have different dietary functions when you consume them.

Human bodies easily digest starch. Your body uses an enzyme called amylase that breaks the alpha bonds to release glucose molecules, which cells break down further to use for energy. Starch’s structure is perfect for fueling your cells. High starch foods include potatoes, pasta, rice, corn and bread.

Human bodies, on the other hand, cannot digest the beta bonds in the fiber we consume. They do not make enzymes that can release glucose molecules from the fiber, so most fibers pass through your digestive tract without being digested and absorbed. They contribute no energy to your diet. Foods with large amounts of fiber include peas, broccoli, oatmeal and pears.

The fiber does offer other health benefits. Fiber promotes bowel health by keeping your stools soft and moist, which reduces the risk of constipation, hemorrhoids and diverticulosis. Since the fiber stays intact in your gut, it gives your muscles something to push on to make it easier to eliminate stools, reducing pressure and inflammation in your intestines.

Some research has shown that consuming fiber reduces risk of inflammatory bowel diseases and protects against cardiovascular diseases. Fiber binds to bile acids that are excreted into your intestines, which helps with fat digestion. The fiber molecules interact with bile acids and dietary cholesterol, causing them to be excreted more easily and lower blood cholesterol levels.

Eating a high fiber diet also helps people feel more full. The fiber absorbs water and expands in your intestine, slowing the movement of food through the digestive system.

Learning about the structures of the carbohydrates you consume can help you understand their function in the body. Even though I think about biochemistry every day, I’m still amazed by how profoundly one bond can change the function of a biomolecule.