12 Signs You May Be Deficient in Zinc

Zinc is a crucial mineral that is found in every cell in the body. It's involved with growth, cell division, the immune system, bones and teeth, skin, the brain, the nervous system not to mention hormones – and yet over a third of people appear to be deficient in the Western world!

12 signs you may be deficient in zinc

1. White spots or lines on your fingernails
2. Pale skin
3. Stretch marks
4. Acne
5. Dry hair
6. Loss of appetite
7. Poor immune system
8. Diarrhoea
9. Low sex drive
10. Weight loss
11. Loss of taste and sense of smell
12. Insomnia

So if you’re suffering from sleep issues, frequent infections, eczema, psoriasis, frequent diarrhoea, hair loss, low sex drive or infertility – perhaps it’s worth checking your zinc levels? Those deficient in zinc may also find their sense of taste and smell affected, which isn't great when you want to explore lots of new foods on your Paleo diet!

How to get more zinc in your diet

There are lots of great natural, Paleo food sources of zinc. Oysters are one of the best sources, but red meat and seafood (especially crab) will also keep your zinc levels topped up. Of course, supplementing is always an option, but always try to get sufficient levels from natural food sources first. Also, don’t forget about vitamin D, as being deficient in vitamin D makes zinc less effective. It’s all about balance, as so many vitamins and minerals work together.

Several things can inhibit your bodies ability to absorb zinc, particularly phytates found in grains and legumes – yet another reason to stick to a Paleo diet and avoid processed neolithic foods!

Have you had your zinc levels checked? How did they fair? Do you eat lots of natural food sources of zinc, or do you supplement?

Why Zinc Deficiency Matters – Especially on a Paleo Diet

Zinc plays a role in hundreds of processes within the body, from cell repair and enzyme function to immunity, fertility and skin health. It's no wonder that even mild deficiencies can trigger noticeable symptoms like fatigue, hair loss, poor wound healing, and lowered libido.

For those following a Paleo lifestyle, zinc needs can generally be met through nutrient-dense whole foods – especially grass-fed red meat, organ meats, and shellfish like oysters and crab. These animal-based sources of zinc are also more bioavailable than plant-based alternatives, meaning your body can absorb them more efficiently.

If you're still showing signs of zinc deficiency despite eating well, it’s worth exploring whether other dietary or lifestyle factors might be at play. For example, excessive alcohol intake, chronic stress, gut issues, or a history of restrictive dieting can all impact zinc absorption.

It’s also important to remember that zinc doesn't work alone. It relies on key nutrients like vitamin D, magnesium, and B6 to do its job well. So focusing on a balanced, nutrient-rich diet is your best bet for preventing deficiency long-term.

Finally, if you're considering supplements, look for forms like zinc picolinate or zinc gluconate, and be mindful of not exceeding the recommended dose – more isn’t always better.

The Link Between Zinc and Hormonal Balance

One of the most underappreciated roles of zinc is its involvement in hormonal health. For both men and women, zinc plays a significant role in regulating key hormones, including testosterone, oestrogen and progesterone. For men in particular, low zinc levels are linked with reduced testosterone production, which can lead to fatigue, reduced muscle mass, and lower libido.

For women, zinc is equally important. It supports ovulation, reproductive health, and healthy skin — all crucial aspects of wellbeing that can be disrupted by deficiency. Zinc is also known to support thyroid function by aiding the conversion of thyroid hormones T4 to the active T3. This makes zinc a key player in energy, metabolism and even mood.

If you’ve been struggling with symptoms such as irregular cycles, PMS, or low energy, zinc may be a helpful nutrient to focus on — especially when consumed in combination with selenium and iodine, which are also vital for hormone regulation.

Zinc and the Immune System

Zinc's role in immune function is well established. It assists in the development and activation of T-lymphocytes, which are essential for mounting a healthy immune response. Zinc also helps the body fight infection more efficiently and recover from illness faster.

In fact, studies have shown that zinc lozenges may shorten the duration of the common cold if taken at the onset of symptoms. It's thought to work by preventing viruses from multiplying and binding in the nasal passages and throat.

If you find yourself constantly catching colds or experiencing slow healing after minor injuries, zinc could be part of the puzzle. Supporting your immune system through zinc-rich foods is a simple and natural way to bolster your body's defences.

Absorption Matters: How to Maximise Zinc Uptake

Getting zinc into your diet is only part of the equation — ensuring you absorb it properly is equally important. As mentioned earlier, phytates found in grains and legumes can inhibit zinc absorption. That’s one of the reasons why a Paleo approach, which naturally excludes these foods, is so effective at helping the body access vital minerals.

To further improve zinc uptake:

• Pair zinc-rich foods with protein, especially animal protein, as this improves absorption.
• Avoid consuming zinc with high amounts of calcium or iron at the same meal, as these minerals can compete for absorption.
• If supplementing, take zinc on an empty stomach or with a light meal that’s low in competing minerals.

Also, look after your gut. Conditions like leaky gut, IBS, or low stomach acid can hinder nutrient absorption. Including gut-healing foods like bone broth, fermented vegetables, and collagen can support digestive health and improve your ability to absorb zinc and other minerals.

Top Paleo-Friendly Sources of Zinc

While oysters are the gold standard, there are many other Paleo-approved foods that contain generous amounts of zinc. Here's a handy list to keep in mind:

• Oysters: The highest natural source of zinc by far.
• Beef (grass-fed): Especially from cuts like chuck roast and shank.
• Lamb: Another great red meat source rich in bioavailable zinc.
• Chicken (especially dark meat): Contains a decent amount of zinc in an easily digestible form.
• Pumpkin seeds: While plant-based, they still contain some zinc, particularly when soaked or sprouted to reduce phytates.
• Cashews: Another moderate plant-based source, ideally consumed raw or sprouted.
• Crab, lobster and other shellfish: Excellent sources that are also rich in other key nutrients like selenium.
• Egg yolks: Provide small amounts of zinc along with healthy fats and fat-soluble vitamins.

For those following a strict Paleo template, focusing on quality meat and seafood should make it easy to meet your zinc requirements without needing to rely on supplementation.

How Much Zinc Do You Really Need?

Zinc requirements can vary depending on age, gender, and individual health factors. In Australia, the NRV (Nutrient Reference Value) recommends around:

• 14 mg per day for adult men
• 8 mg per day for adult women
• Up to 11 mg per day for pregnant women

However, these figures represent baseline requirements. If you’re under significant stress, healing from illness, eating a limited diet, or consuming alcohol regularly, your needs may be higher.

Zinc is also lost through sweat, so those who exercise intensely or live in hot climates may benefit from a slightly higher intake.

When to Consider Testing

If you're concerned about potential deficiency, the most accurate way to test zinc status is through a plasma or serum zinc test ordered by your GP or naturopath. Be aware that results can be affected by inflammation, infection, or even the time of day, so context is important.

Hair mineral analysis is another tool some practitioners use, but it is less reliable and should be interpreted with caution. As always, symptoms and dietary habits should guide any decision to test or supplement.

Final Word on Zinc and Paleo Living

Zinc is a powerful micronutrient that plays an essential role in everything from immune function to skin clarity, hormonal balance and wound healing. It’s easy to overlook, yet a deficiency can subtly impact many aspects of health.

A well-planned Paleo diet — rich in meat, seafood and whole foods — makes it easier to meet your zinc needs naturally. So if you're experiencing any of the symptoms mentioned earlier, it might be time to reflect on whether your plate is delivering this vital mineral.

Have you noticed a difference after increasing your zinc intake? Do you rely on food, or have you found supplements helpful? Share your experience in the comments below!