A to Zinc: A handy guide

A to Zinc

Acne: Zinc is an important component for healthy skin, and in particular for sufferers of acne. It can control the production of oil in the skin and help balance some of the hormones that can lead to acne. Many skin disorders can be attributed to insufficient zinc.

Bioavailability: The bioavailability of zinc from grains and plant foods is lower than that from animal- based foods such as lean red meat and poultry, although many grain and plant-based foods are still good sources of zinc.

Common Cold: Much research has been done around zinc and its capacity to combat the common cold. Although studies examining zinc treatment on cold symptoms has shown varied results over years, it appears to be beneficial under certain circumstances. The Cochrane Report concluded that taking it within 24 hours of developing symptoms and has been shown to reduce the severity and duration of cold symptoms in healthy people by up to a third. It does this by directly inhibiting the rhinovirus binding and replicating and suppressing inflammation.

Depression: Virtually every enzyme reaction in the brain involves zinc, and low levels have been linked to anxiety and depression.

Eyesight: Research has suggested that zinc and antioxidants may delay the progression of age- related macular degeneration and vision loss, possibly by preventing cellular damage in the retina.

Food sources: Lean red meat is an excellent dietary source, and it is also highly bioavailable, meaning your body can absorb it much more readily. Poultry, nuts, seeds, and lentils are other good sources. Green leafy vegetables and fruits contain modest amounts of zinc.

Grains: Wholegrain breads, cereals and other grains contain zinc, but these foods also contain phytates, which can bind zinc and therefore inhibit its absorption. While these plant-based options are good dietary sources, the bioavailability is often lower than animal-based products.

Hair loss: In severe cases zinc deficiency can cause hair loss and a dry flaky scalp.

Immune system: Zinc is needed for the proper functioning of the immune system, and enables protein synthesis and cell growth.

Job: Zinc is often seen as the gatekeeper for your immune system, to ward off bacterial and viral infections like the common cold.

Kids: Zinc supports normal growth and physical development during pregnancy, and this continues through childhood and adolescence.

Low zinc content in our soils: Plants, like our bodies, cannot make minerals. They instead extract them from the soil. Like many other mineral and trace elements, if they are lacking in the soil they will be lacking in the plants we eat or the animals that are grazing the fields and providing our much-need protein. If certain crops aren’t rotated, it can seriously deplete the soils of these minerals, leading to deficiencies in our diet.

Magnesium: Both zinc and magnesium help protect the brain and the eyes from excitotoxin additives that are common in foods today. In New Zealand, deficiency of both of these minerals is common due to soil depletion.

Nutrients: As well as being involved in hundreds of processes within the body, zinc helps us absorb and utilise nutrients from our food.

Oysters: Oysters contain more zinc per serving than any other food.

RDI for zinc is higher for pregnant and lactating women.

Pregnant women: Pregnant and breastfeeding mothers may require bigger intakes, as there are high foetal requirements for zinc, and lactation can also rapidly deplete mineral stores. For these reasons, the RDI for zinc is higher for pregnant and lactating women, and supplementation is often recommended.

Quote: “Just about all skin disorders improve if you build up your zinc stores.” Dr Robert Atkins

RDI (Recommended Daily Intakes): Common RDIs for zinc are as low as 5mg for a child, 7mg for a teenage girl, 13mg for a teenage boy. For adult woman it is 8mg, increasing to 12 mg when breastfeeding or pregnant, and 14mg for adult males.

Stress: There is evidence that zinc levels decrease following physical stress or injury. It is one of the few minerals lost in the urine following acute or chronic physical stress.

Taste test: There is a simple test you can take to measure your zinc status, which can often be provided by your local health shop. It involves taking a tiny amount of zinc sulphate, dissolving it in water and then tasting as little as a spoonful. This test works because zinc is required for your taste buds to function. If you notice a bitter, astringent taste you are not deficient. If this bitter taste is delayed by more than a few seconds, you need more zinc in your diet. If there is a much longer delay or if you don’t notice the bitterness or it tastes like water, you may have a deficiency and will need to restore your zinc levels.

Ultimate nutrient: Zinc is responsible for hundreds of processes within our brain and our body, and is one of the most important minerals for our health throughout our life. There are more roles in the body for zinc than any other nutrient.

Vegetarians often require as much as 50% more of the RDI for zinc.

Vegetarians: Vegetarians often require as much as 50% more of the RDI for zinc than non-vegetarians. Zinc can be sourced from whole-grain breads, cereals, nuts, seeds, beans and legumes, but these foods also contain phytates, which can bind zinc and therefore inhibit its absorption. While these plant-based options are good dietary sources, the bioavailability is often lower than animal- based products.

Vitamin C: With the help of vitamin C, zinc has been used in research into improving age-related macular degeneration (AMD). After an average follow-up period, supplementation with antioxidants plus zinc (but not antioxidants alone) significantly reduced the risk of developing advanced AMD and reduced visual acuity loss.

Wound healing: Zinc is critical for wound healing, whether it is a small cut, or helping the skin recover from surgical procedures. It also helps prevent scar formation.

EXcessive zinc: A over-large intake of zinc may result in side effects with symptoms ranging from mild to severe. Intake of 50 to 150 milligrams per day of supplemental zinc may cause minor intestinal distress occurring within three to 10 hours after ingestion. Single doses of 225 to 450 milligrams of zinc usually cause nausea and induce vomiting.

Yellow fungus growth on toenails: Many skin disorders are related to insufficient zinc, including abdominal stretchmarks after childbirth, split fingernails with white specks, as well as yellow toenails and/or fungus growth.

Zinc: There are more roles for zinc than any other nutrient. It is one of the most important elements for our health yet one of the most deficient in our diet, especially here in New Zealand. This is due to the quality of our soils and the impact of the foods we eat, and the water we drink.

Disclaimer:
The information in this article is not intended as a medical prescription for any disease or illness. Nothing stated here should be considered medical advice. Use as directed. If symptoms persist, consult your healthcare professional. 

Why is Zinc essential?

Why is Zinc essential?

There are more roles for zinc than any other nutrient. It is one of the most important elements for our health, yet one of the most deficient in our diet, especially here in New Zealand.

The chronic lack of zinc in Aotearoa is due to the quality of our soils and the impact of the foods we eat, and the water we drink.

Here’s an overview of the critical roles this mineral plays in our bodies. Also see our handy guide: A to Zinc.

Zinc’s Role

Zinc is involved in hundreds of processes within the body, and it helps us absorb and utilise nutrients from our food.

It plays a role in immune function, helping repel and overcome bacterial and viral infections like the common cold. It assists with growth development, protein and DNA synthesis, and is effective in wound healing.

Zinc is essential for the brain and neurological function as well as the maintenance of vision, taste and smell. It nourishes the scalp and helps maintain strong and healthy gums, hair, skin and nails. It can help avoid hair loss, which can be a symptom that you may be deficient. Zinc can control the production of oil in the skin and help balance some of the hormones that can lead to acne. Many skin disorders can be attributed to insufficient zinc.

Zinc is important to our health and wellbeing throughout our life. It supports normal growth and physical development during pregnancy, and this support continues through childhood and adolescence.

There is almost no part of the body that zinc doesn’t benefit, either inside or out.

It is key to both male and female reproductive health and is vital as we grow older, as it helps maintain bone density and muscle bulk.

However, zinc can be harder to access through diet for both women and men as they age, as the body doesn’t have the ability to store minerals. New Zealand surveys have shown that 52% of middle-aged men aren’t getting enough zinc each day, and that figure increased to 90% for men aged over 70.

Zinc has been shown to reduce the severity and duration of cold symptoms.

Zinc and the Common Cold

Much research has been done around zinc and its capacity to combat the common cold. Although studies examining zinc treatment on cold symptoms have shown varied results over years, it appears to be beneficial under certain circumstances.

The Cochrane Report concluded that taking it within 24 hours of developing symptoms has been shown to reduce the severity and duration of cold symptoms in healthy people by up to a third. It does this by directly inhibiting the rhinovirus binding and replicating and suppressing inflammation.

More research is needed to determine the optimal dosage, formulation and duration of treatment before a recommendation for zinc in the treatment of the common cold can be made.

Some of us need zinc more than others.

Studies have shown that New Zealand men have lowered zinc status, especially as they age. Men require an RDI of 14mg just to prevent deficiency.

Several New Zealand studies have suggested that many adolescent girls aren’t getting enough zinc and this may be affecting their growth and development. This could be due to changing diets, less red meat and seafood being consumed, as well as the prevalence of processed foods, which are often refined and lacking minerals and other nutrients.

New Zealand surveys have shown that 52% of middle-aged men aren’t getting enough zinc each day, and that figure increased to 90% for men aged over 70.
52% of middle-aged men aren’t getting enough zinc, increasing to 90% for men aged over 70.

Pregnant and breastfeeding mothers also require bigger intakes, as there are high foetal requirements for zinc, and lactation can also rapidly deplete mineral stores. Breast milk provides enough zinc (RDI 2mg) for baby for the first six months, but zinc needs to be acquired from food sources as the child grows. Supplementation of zinc has been shown to improve the growth and development of some children who have exhibited a mineral deficiency.

Zinc has limited storage capacity with our body, so a deficiency can develop quickly if we’re not restoring and replenishing.

Diagnosing Deficiency

Blood tests are not a reliable method for detecting zinc deficiency as most of the zinc in our bodies is retained in our cells rather than in our blood. However, there is a simple test you can take to measure your zinc status, which can often be provided by your local health shop.

It involves taking a tiny amount of zinc sulphate, dissolving it in water and then tasting as little as a spoonful. This test works because zinc is required for your taste buds to function.

If you notice a bitter, astringent taste you are not deficient. If this bitter taste is delayed by more than a few seconds, you need more zinc in your diet. If there is a much longer delay or if you don’t notice the bitterness or it tastes like water, you may have a deficiency and will need to restore your zinc levels.

In this case, you may already be experiencing some common symptoms of a low zinc status such as frequent colds or infections, weak sense of smell and taste, hair loss, slow wound healing or skin disorders and inflammation.

You may be advised to supplement with zinc for a period and look to include more zinc-rich foods in your diet, such as lean red meat, dairy, seafood, poultry, or whole-grains, beans and legumes.

Getting Zinc into Your Daily Diet

The best source of zinc is rock oysters, which contain significantly more zinc than red meat and grains but are often not a regular part of our diet. Fats, which contain very little zinc, also tend to dilute zinc from the diet.

Lean red meat is an excellent dietary source, and it is also highly bioavailable, meaning your body can absorb it much more readily. Green leafy vegetables and fruits contain modest sources of zinc.

There is almost no part of the body that zinc doesn’t benefit, either inside or out.

Some animal-free options include whole-grain breads, cereals, nuts, seeds, beans and legumes, but these foods also contain phytates, which can bind zinc and therefore inhibit its absorption. While these plant-based options are good dietary sources, the bioavailability is often lower than animal- based products.

Vegetarians often require as much as 50% more of the RDI for zinc than non-vegetarians.

Note that techniques such as soaking beans and grains in water for several hours can reduce this binding of zinc by phytates and thus increase bioavailability. Vegetarians often require as much as 50% more of the RDI for zinc than non-vegetarians.

Studies from New Zealand nutrition surveys and overseas research suggest most of us are accessing only half of the daily zinc we require from our diet.

Zinc Deficiency Inhibits Absorption

Once you become zinc deficient, it can be very difficult to improve zinc levels purely through food alone, as your body’s absorption often depends on having enough zinc in the first place.

In addition, if you are recovering from an operation, have suffered emotional stress, or been over-exercising, your body will look to use all the available zinc on offer in an effort to heal. Zinc is one the few minerals lost rapidly in the urine after suffering acute psychological stress.

Gastrointestinal surgery and digestive disorders such as Crohn’s disease can decrease zinc absorption. Other illnesses associated with zinc deficiency include chronic liver disease, alcoholic cirrhosis, anorexia nervosa, chronic renal disease, diabetes, malignancy and sickle cell disease. Diarrhoea can also lead to excessive loss.

Supplementation may then be required to achieve good zinc status and you will then be able to maximise your zinc from food sources once again.

Summary

While we should be getting our important vitamins, minerals and other nutrients from the food we eat, there are often factors that prevent this from happening.

Soil depletion, the prevalence of processed food and bouts of illness can lead to mineral deficiencies that prevent the nutrients reaching the cells in our body and enabling the hundreds of processes that keep us healthy.

It is important to be aware of some simple things we can do to restore and replenish these minerals, to maintain optimal levels and supplement when needed to avoid larger health problems.

References:
Coory, David. Stay Healthy by supplying what’s lacking in your diet. 1992
Schauss, Alexander G. Minerals, Trace Elements, & Human Health. Life Sciences Press. 1995
Institute of Medicine, Food and Nutrition Board. Dietary Reference Intakes for Vitamin A, Vitamin K, Arsenic, Boron, Chromium, Copper,
Iodine, Iron, Manganese, Molybdenum, Nickel, Silicon, Vanadium, and Zinc. Washington, DC: National Academy Press, 2001
Singh M, Das RR. Zinc for the common cold. Cochrane Database Syst Rev. 2011
Prasad AS. Zinc deficiency: its characterization and treatment. Met Ions Biol Syst 2004

Disclaimer:
The information in this article is not intended as a medical prescription for any disease or illness. Nothing stated here should be considered medical advice. Use as directed. If symptoms persist, consult your healthcare professional. 

Silica: Understanding this important mineral

Woman stretching in yoga studio.

Silica: Understanding this important mineral.

Minerals such as such as magnesium, potassium and iron are the catalysts for all the vitamins and other nutrients your body uses for developing and maintaining good health. Our bodies can’t produce these minerals, so we have to obtain them from the foods we eat. In addition, we now know that New Zealand soils are often deficient in iodine, selenium and zinc due to intensive farming techniques.

Of all the minerals we need to stay healthy, silica is perhaps the least known and the least understood. It plays an important role in strengthening our skin tissue and bone as well as providing a number of other benefits. It is the seventh most prevalent element in human tissue, after calcium, which it works with to maintain healthy bones. Although silica is one of the most abundant substances in the body, as we age we retain less and less, and our intake tends to decrease with age, so it’s important that we maintain good levels through our diet and supplement if required.

Of all the minerals we need to stay healthy, silica is perhaps the least known and the least understood.

Silica helps with collagen formation, joint function, strong bones, teeth and gums, gastrointestinal issues and is great for hair, skin and nails. Modern diets are lacking in silica due the refinement of the grains we eat and the filtering of the water we drink. The body needs to compensate for the lack of minerals by taking it from the healthy reserves in our bone and muscle, thus leaving our system deficient and vulnerable to problems that can get worse as we age. When we are young, silica levels in our body are high and our bones and joints are flexible, but as we get older, these levels decline and this can lead to muscle degradation, soreness, lack of mobility, injuries, and longer healing times when injuries do happen.

Silica has been shown to support hair growth, healthy skin, and strong nails.
Silica has been shown to support hair growth, healthy skin, and strong nails.

The many benefits of Silica.

Healthy Skin: One of the primary functions of silica is to maintain healthy skin tissue by boosting the production of proteins such as collagen, elastin and keratin.

Collagen is the tissue which holds our cells together and is the major component of everything from our bones to our skin. It is the most plentiful protein, making up 75-80% of the skin. 

Elastin, along with collagen, is responsible for giving structure to the skin and can help to reduce fine lines and wrinkles, and make the skin feel supple. Keratin strengthens hair follicles, nails, and the surface layer of the skin.

Hair, skin, nails: Silica is often known as the ‘beauty mineral’ as it promotes the production of collagen and is has been shown to support hair growth, healthy skin, and strong nails. 

While there’s no scientific evidence that silica can reverse the effects of hair loss, it’s been found to deliver essential nutrients to your scalp and hair follicles and it may help strengthen hair and prevent hair breakage.

It also strengthens teeth and gums. Many toothpastes include silica as an ingredient, and it can help with inflamed and bleeding gums.

“I had trouble with my hair falling out and it had stopped growing. After the first month of taking this every day my hair had started to grow again, and stopped falling out at the rate it had been. I’m on my third bottle now, but I only take it every second or third day. REALLY pleased with this product.”

—Tina

Immune system support: As the skin is the largest organ in the body, it is the first line of defence against naturally occurring bacteria, viruses and other pathogens. Strong, healthy skin can help guard against infection.

Silica can also assist in the fast healing of burns and other wounds, as it stimulates rapid re-growth of damaged tissue. You can apply it topically to the affected area and feel relief within seconds.

Joint support: Silica assists joint function by the strengthening of connective tissues, ligaments and muscles. This in turn can also improve overall flexibility. It may also reduce swelling of joints caused by injury which can help speed up the recovery process.

Bone formation: Silica promotes bone formation, as it manages calcium usage and storage throughout the body. It enhances calcium absorption, and these two minerals work together to help strengthen your bones. It is impossible to form bone without both calcium and silica. It is thought that supplementation of silica, rather than calcium is what’s needed for maintaining strong bones and enhance longevity.

Digestive Health: Gut health is top of mind these days, and silica helps to maintain the tissues that are found along the digestive tract. Most disorders of the stomach involve a degradation of the lining in the gastrointestinal tract, and silica is an essential element involved in rebuilding and maintaining these tissues.

Aluminium detoxification: Silica has shown to be a good eliminator of aluminium. Aluminium is a proven neurotoxin, and has been implicated as a cause of Alzheimer’s disease. Silica naturally reacts with aluminium, thereby forming aluminosilicate. This reaction between silica and aluminium can occur within the body, and is believed to be an important mechanism for aluminium detoxification. Aluminosilicates are nontoxic and are eliminated by the kidneys via the urine. This may help inhibit your body’s absorption of aluminium, meaning that it is able to help decrease the amount of aluminium build-up that is found in the brain’s tissues.

Silica Liquid Mineral. Each 2ml contains: Silica Dioxide 375mg, Purified Water. 100% bioavailable
Each 2ml contains: Silica Dioxide 375mg and purified water. 100% bioavailable.

Silica deficiencies 

It is common these days for deficiencies to occur. We are simply not getting enough of this mineral in our diets to the depletion in our soils, as well as the availability of processed foods and the refinement of grains. The husks of grains are where we have historically obtained our dietary intake of silica. But with invention of the combine harvester, husks were automatically removed to create more refined flour and grains. Bread once contained many minerals, but the prevalence of white bread and white flour has seen these minerals disappear and manufacturers try to add the minerals back in with additives. These additives are often a poor substitute.

These days, we often drink filtered or purified water, which take out potentially harmful chemicals but also strip the essential minerals that we need too. Unless we are able to replenish and replace these minerals, our body will continue to take them from our reserves that are stored in our bones and muscle, making us deficient and vulnerable to weakened tissue, sore joints and skin issues.

Foods containing the mineral Silica, whole grains, oats, corn, beetroot, asparagus and avocados.
Silica is found in whole grains, oats, corn, beetroot, asparagus and avocados.

How to get more Silica in your diet

Silica doesn’t occur naturally in a lot of foods, but is found in husks of whole grains, natural oats, barley, wheat, corn, beetroot, asparagus, alfalfa sprouts and potato skins. It is also present in lettuce, cucumbers, avocados, strawberries and onions. The less refined and the less processed the foods are the better.

Like a lot of other minerals, as we age, the human body retains less and less silica, so there may be a need to supplement. While silica is essential for good health, and we are now aware of the benefits, no RDI has yet been established. A daily, therapeutic dose of 375mg is recommended, and taking it in liquid form is best for optimal absorption and bioavailability. 

Disclaimer:
The information in this article is not intended as a medical prescription for any disease or illness. Nothing stated here should be considered medical advice. Use as directed. If symptoms persist, consult your healthcare professional.