Discover the superpower of zinc and zinc supplements for enhanced well-being, better immunity, healthier skin & nails, improved hair growth and better moods!

This overlooked essential mineral works tirelessly to shield your body against infections by giving a powerful boost to your immune system, all without breaking the bank. Elevate your wellness-routine with a top-notch zinc supplement, a smart move to equip your body with the immune support it craves, especially in our modern-day stressful and often challenging times.

This essential mineral is critical to many bodily processes: From normal cell development to protein synthesis, zinc is the true champion, being a necessary key component in over 300 enzymes. Without it, our immune-system literally can not function: for example, many antibodies to fight viruses and bacteria could simply not be produced in our body without enough zinc. Meaning, we will get ill quicker or take longer to recover from illness.

We get our daily zinc intake usually through food. However high caffeine consumption, stress, and our often unhealthy modern day-diets and lifestyle can lead to a zinc deficiency. Zinc supplements can bridge this gap. Adding a quality zinc supplement to your daily routine is thus a smart way to give your body the immune support it needs and to improve your overall well-being, your mood and your skin.

A world without zinc would literally render our immune system powerless. So, gear up and let zinc be your ultimate defender!

This article aims to help you understand what this essential mineral does in the body and how important zinc really is. Plus, it guides you through the jungle of zinc supplementation, providing you with the information you need to make a well-informed decision when buying your next zinc supplement.

Foods Rich in Zinc:

1. Eating foods high in zinc, such as shellfish, beef, dairy, whole grains, nuts, and legumes, can help to boost immunity and aid in recovery from illnesses. If you’re vegan or vegetarian ensure you know which vegetables and legumes contain enough zinc, and mix these into your daily diet regime.

2. Zinc-rich foods are also essential for healthy hair, skin, and nails, as well as normal growth and development.

• Animal products: beef, liver
• Seafoods: oysters, crab, shrimps, mussels
• Vegetables: mushrooms, spinach, shiitake mushrooms, radishes, artichokes,
  swiss chard, broccoli
• Herbs: nettle leaf, parsley
• Legumes: beans, chickpeas, lentils, peas
• Tofu
• Eggs
• Nuts: walnuts, cashew nuts, almons
• Seeds: sprouted seeds, chia seeds, quinoa, ground linseed,
  hemp seeds, pumpkin seeds
• Oats
• Cocoa Powder
• Bananas
  
  

Interesting Zinc Facts:

• People that sweat a lot are subject to more zinc loss; for example athletes, those in hot climates, and menopausal women
  
• Zinc absorption appears to be decreased in the elderly.
  
• Zinc absorption can be increased with dietary protein intake.
  
• Phytates in cereals and soy inhibit absorption of zinc (always soak your grains / cereal / seeds over night before using)
  
• Casein in milk and calcium inhibit absorption by binding with zinc ions.
  
• Iron inhibits absorption of zinc. Cadmium-toxic levels can inhibit zinc absorption
  
• Zinc should be taken on an empty stomach whenever possible. Take your zinc tablet(s) at least 30 minutes before a meal.
  
• If you take zinc directly with your meal, avoid foods with a high phytic acid content (e.g. cereals, legumes, nuts). Because this inhibits zinc absorption.
  
• Coffee and beverages containing tanning agents such as black or green tea can impair the absorption of zinc.
  
• If there is a zinc deficiency, it can be useful and necessary to take high-dosages of zinc (up to 25 mg per day or more).
  
• If in doubt, ask an alternative practitioner how best to take your zinc supplement.

Zinc Supplements:

Zinc supplements come in tablets, capsule, powder or liquid forms.

For all products you should look out for those being vegan and without the following list of unnecessary additives.

AVOID:

• Maltodextrin
• Alcohol
• Dextrose
• ‘Natural’ flavours
• Magnesium stearate (being a very controversial additive in nutritional supplementation)
• All chemical and non-chemical sweeteners such as aspartame, sucralose, acesulfame, and so forth.
• GMO content
• Soya
• Gluten

When buying capsules, only buy products where the capsule shell is made from microcrystalline cellulose. This is a vegetable fiber that is not absorbed by the body and is excreted undigested. It is therefore a very safe and harmless substance.

When examining zinc supplements, you’ll likely find that one of the above compounds is included in the product. Some companies may even provide a blend of various zinc compounds in their products. They explain that each compound is absorbed and metabolized differently by the body, so combining different types can offer improved bioavailability and compatibility.

Bioavailability

What is bioavailability?

Wikipedia states:

‘Bioavailability is a pharmacological measure of the proportion of an active ingredient that is available unchanged in the systemic circulation (especially in the blood circulation). It indicates how quickly and to what extent the substance (mostly medicinal product) is absorbed (resorbed) and is available at the site of action’[3]

Bioavailability of Zinc Supplements

The bioavailability of zinc compounds varies greatly. Generally, organic zinc compounds have a higher bioavailability than inorganic zinc compounds.

Research shows that absorption is maximized when zinc is bound to an amino acid [4]. Compounds are also not equally studied; zinc-sulfate and zinc-histidine, for example, are the most studied forms, with zinc-sulfate often being used as a reference guide when comparing to other zinc-compounds [5]. Organic acids, such as citrate, can increase the bioavailability of zinc. Ascorbic acid, on the other hand, does not improve the availability of zinc [4].

Another good indicator for zinc absorption is how well the body tolerates the different forms of zinc, showing in Gastrointestinal (GI) symptoms such as constipation and diarrhoea. As some studies suggest, the fewer side effects, the better the mineral is absorbed. The zinc chelate zinc bisglycinate seems to currently come up on top. Studies show that it is very well tolerated in terms of GI issues. [6].

Best Zinc Compounds

Drawing upon my research and personal experience, I have created this ranking of zinc compounds:

• 1. Zinc bisglycinate: zinc bisglycinate has superior bioavailability than other zinc compounds, with one zinc molecule binding to two molecules of the amino acid glycine. Studies suggest it is almost 45% more absorbable than zinc gluconate and is well tolerated in the GI tract. [5,6]
  
  
• 2. Zinc histidine: Studies show that the amino acid histidine increases the bioavailability of zinc, raising the concentration in blood serum threefold more than zinc sulfate. Zinc histidine is one of the best-researched forms of zinc and is considered highly tolerable. The World Health Organization (WHO) has highlighted histidine as a complex partner for zinc in child nutrition[7].
  
  
• 3. Zinc picolinate: Picolinic acid is found in our bodies and can break down metals like chromium, zinc, manganese and copper. Zinc picolinate is a well-absorbed form of zinc, better than zinc citrate and zinc gluconate. All three were tested relative to one another, and zinc absorption was improved mostly by zinc picolinate [8,9].
  
  
• 4. Zinc gluconate: Zinc bound to gluconic acid is more bioavailable than zinc sulfate, according to studies. Studies also suggest similar absorption rates for zinc gluconate and zinc citrate. [10, 11]
  
  
• 5. Zinc sulfate: Zinc sulfate is widely studied and used as a reference point for other forms of zinc [12]. However, at higher doses, it can cause unpleasant side effects such as vomiting and nausea [13]. Quality varies significantly due to variation in production*. Though usually lower in bioavailability than gluconate, histidine and bisglycinate [12, 14], zinc sulfate is highly recommended by A. Williams. He recommends a high quality zinc sulfate hepta hydrate. For this reason zinc sulfate ranks higher in my list here than otherwise research would suggest.
  
  
• 6. Zinc citrate: Zinc citrate is an organic form of zinc, thought to be absorbed as well as other forms such as sulfate, gluconate, and bisglycinate. However, studies have shown that it does not lead to a change in serum levels [9] when taken as a supplement, making it less bioavailable and digestible than zinc sulfate.
  
  
• 7.Zinc orotate: Zinc orotate has been marketed as a zinc supplement for years; however, studies suggest its bioavailability is low compared to zinc sulfate [15].
  
  
• 8. Zinc aspartate: Studies show zinc aspartate has no advantages over zinc histidine or sulfate [15]. Furthermore, enteric-coated tablets of zinc aspartate are poorly absorbed [17].
  
  
• 9. Zinc oxide: Zinc oxide is utilized in wound healing and ointments, as well as an active ingredient for oral supplementation. However, it has a low bioavailability (61%) compared to zinc sulfate [14]. Further research has shown it to be an unsuitable compound for patients with disorders of gastric acid production [18].
  
  
  
  *Note: The quality of ALL zinc products on the market can vary depending on production and quality of brand. Therefore, always look out for high quality supplements that are free of fillers, binders and any other unnecessary ingredients such as natural flavours, alcohol, etc.
  
  **Note: There are plenty more zinc compounds on the market than in my list of compounds above. If you find a zinc compound in your product that is not in the list above, I suggest you always do your own research or write to the customer-care team of your preferred supplement brand for more information.
  

Zinc Side Effects:

Taking zinc supplements can cause side effects depending on the individual, as everyone responds differently to nutritional supplements. Generally, side effects are uncommon when daily intake guidelines are followed. However, some of the more common side effects include symptoms of the GI tract such as diarrhea and stomach cramps, as well as nausea or headaches. This can be due to taking too high a dosage, a low quality product, or individual sensitivities. Therefore, make sure to use a good quality product and start with a low dosage to ensure that you are not overly sensitive to the supplement. Once you have determined that you can tolerate the supplement, you can increase the dosage.

Dosage and Absorption:

The German Nutrition Society has recently revised its reference values for zinc intake, recommending that women consume between 7 mg and 10 mg and men between 11 mg and 16 mg daily. The previous values were 7 mg and 10 mg for women and men, respectively. However, I believe these values to be too low, as not all zinc supplements are efficiently absorbed depending on an individual’s diet quality, GI tract functioning, and other factors. For this reason, I would typically recommend an average dose of 15mg to 25mg of zinc per day or every two days, depending on the severity of zinc deficiency or related health issues.

My top Zinc Supplements: