# Immune System

## What Are Immune System Supplements?

Immune system supplements are dietary products formulated to support the normal function of the immune system and the body’s natural defences. These formulas often contain a combination of vitamins, minerals and plant extracts such as vitamin C, vitamin D, zinc, selenium, vitamin A, B-group vitamins, elderberry, echinacea, beta-glucans and probiotics. Immune support supplements are usually available as capsules, tablets, powders, syrups, gummies or effervescent tablets with clearly defined daily dosages. They are designed to complement a balanced diet, good sleep and a healthy lifestyle, not to replace them.

## Benefits of Immune System Supplements

Immune system supplements help provide key nutrients that support the body’s defence mechanisms, especially during demanding periods or seasonal changes. Vitamin C, vitamin D, zinc and selenium contribute to the normal function of the immune system and help protect cells from oxidative stress. Some immune formulas also include plant extracts such as elderberry or echinacea, which are traditionally used to support the upper respiratory tract and overall resilience. When taken regularly as part of a varied diet, immune support supplements can help maintain vitality, energy and readiness to cope with everyday challenges.

## Uses of Immune System Supplements

Immune system supplements are often chosen during autumn and winter, in times of increased workload or stress, or whenever additional immune support is desired. They can be used daily as part of a morning routine, taken with meals or used in short courses according to the manufacturer’s recommendations. Some people prefer simple combinations such as vitamin C and zinc, while others choose complex immune formulas with added vitamin D, selenium, plant extracts or probiotics. On our category page you can explore a wide range of immune system supplements and select products that best match your age, lifestyle and wellness goals.

## Immune System Supplements: Side Effects and Overdose

Immune system supplements are generally well tolerated when used according to the instructions, but individual reactions are possible, as with any dietary supplement. Some people may experience mild digestive discomfort, headache or allergic symptoms depending on personal sensitivity and the product’s full ingredient list. Excessive intake of certain vitamins and minerals – for example vitamin A, vitamin D or zinc – may cause unwanted effects, so it is important not to exceed the recommended daily dose stated on the packaging and to consider total intake from all sources. People with chronic illnesses, those taking prescription medications, as well as pregnant and breastfeeding women should consult a doctor or healthcare professional before starting new immune support supplements.

## Where to Buy Immune System Supplements in Estonia?

In Estonia, **immune system supplements** can be purchased from our e-shop fits.ee.

## Products in this collection

- [Lion's Mane Strong 5600mg 60 capsules](https://fits-supplements.com/products/lion-s-mane-strong-5600mg-capsules) - 19.9 EUR
- [Probiotic Complex Strong 60 capsules](https://fits-supplements.com/products/probiotic-complex-strong-60-capsules) - 15.9 EUR
- [Turmeric 2500mg and Black Pepper 10mg 60 tablets](https://fits-supplements.com/products/turmeric-2500mg-and-black-pepper-10mg-tablets) - 12.9 EUR
- [Turmeric Strong 2500mg with Ginger and Black Pepper 60 tablets](https://fits-supplements.com/products/turmeric-strong-2500mg-with-ginger-and-black-pepper-tablets) - 15.9 EUR
- [Turmeric Strong 2500mg 60 tablets](https://fits-supplements.com/products/turmeric-strong-2500mg-tablets) - 9.9 EUR
- [Moringa Strong 12000mg 60 capsules](https://fits-supplements.com/products/moringa-strong-12000mg-60-capsules) - 10.9 EUR
- [NAC N-Acetyl L-Cysteine 150mg 90 capsules](https://fits-supplements.com/products/nac-n-acetyl-l-cysteine-150mg-90-capsules) - 7.8 EUR
- [Probiotic Complex 30 capsules](https://fits-supplements.com/products/probiotic-complex-capsules) - 7.5 EUR
- [Probiotic Complex 90 capsules](https://fits-supplements.com/products/probiotic-complex-90-capsules) - 19.8 EUR
- [Lactobacillus Acidophilus 50mg 90 tablets](https://fits-supplements.com/products/lactobacillus-acidophilus-50mg-90-tablets) - 12.9 EUR
- [Cordyceps Sinensis Strong 2300mg 60 capsules](https://fits-supplements.com/products/cordyceps-sinensis-strong-2300mg-60-capsules) - 16.0 EUR
- [Organic Reishi 400mg 60 capsules](https://fits-supplements.com/products/organic-reishi-400mg-capsules) - 8.7 EUR
- [Melatonin 1,9mg 90 capsules](https://fits-supplements.com/products/melatonin-1-9mg-90-capsules) - 6.9 EUR
- [Ginger 12000mg 60 capsules](https://fits-supplements.com/products/ginger-12000mg-60-capsules) - 12.9 EUR
- [Ginger 1000mg 90 capsules](https://fits-supplements.com/products/ginger-1000mg-90-capsules) - 6.0 EUR
- [Black Cumin Oil 300mg 90 softgels](https://fits-supplements.com/products/black-cumin-oil-300mg-90-softgels) - 10.8 EUR
- [Cat's claw Strong 2000mg 60 capsules](https://fits-supplements.com/products/cat-s-claw-strong-2000mg-capsules) - 13.8 EUR
- [Aloe Vera 10000mg 60 tablets](https://fits-supplements.com/products/aloe-vera-10000mg-tablets) - 11.5 EUR
- [Algae Oil 500mg DHA 200mg 60 softgels](https://fits-supplements.com/products/algae-oil-500mg-dha-200mg-60-softgels) - 14.9 EUR
- [Quercetin 400mg 90 capsules](https://fits-supplements.com/products/quercetin-400mg-90-capsules) - 15.9 EUR
- [Propolis Strong 1750mg 60 capsules](https://fits-supplements.com/products/propolis-strong-1750mg-60-capsules) - 16.9 EUR
- [Garlic Extra Strong 2000mg 60 tablets](https://fits-supplements.com/products/garlic-extra-strong-2000mg-tablets) - 10.8 EUR
- [Dandelion 3000mg 60 capsules](https://fits-supplements.com/products/dandelion-3000mg-capsules) - 9.0 EUR
- [Organic Turmeric powder 300g](https://fits-supplements.com/products/bio-organic-turmeric-300g-powder) - 9.6 EUR
- [NAC N-Acetyl L-Cysteine powder 100g](https://fits-supplements.com/products/nac-n-acetyl-l-cysteine-100g-powder) - 17.9 EUR
- [Quercetin Complex 90 capsules](https://fits-supplements.com/products/quercetin-complex-90-capsules) - 15.9 EUR
- [Potassium Chloride powder 100g](https://fits-supplements.com/products/potassium-chloride) - 10.0 EUR
- [NAD+ and Resveratrol 60 capsules](https://fits-supplements.com/products/nad-and-resveratrol-60-capsules) - 39.0 EUR
- [Resveratrol 450mg 60 capsules](https://fits-supplements.com/products/resveratrol-450mg-60-capsules) - 19.9 EUR
- [NAD+ Strong 500mg 60 capsules](https://fits-supplements.com/products/nad-strong-500mg-60-capsules) - 39.0 EUR
- [Lactobacillus Acidophilus 50mg 30 tablets](https://fits-supplements.com/products/lactobacillus-acidophilus-50mg-tablets) - 6.0 EUR
- [Tart Cherry 200mg 90 capsules](https://fits-supplements.com/products/tart-cherry-200mg-90-capsules) - 9.9 EUR
- [Asparagus (Shatavari) 600mg 60 capsules](https://fits-supplements.com/products/asparagus-shatavari-600mg-capsules) - 9.9 EUR
- [Quercetin and Bromelain Complex 90 capsules](https://fits-supplements.com/products/quercetin-and-bromelain-complex-90-capsules) - 17.9 EUR
- [Organic Mucuna Pruriens 400mg 60 capsules](https://fits-supplements.com/products/organic-mucuna-pruriens-400mg-60-capsules) - 7.9 EUR
- [Multi-Enzymes Complex DigeZyme® 300mg 60 capsules](https://fits-supplements.com/products/multi-enzymes-complex-digezyme®-300mg-60-capsules) - 11.9 EUR
- [NAD+ powder 50g](https://fits-supplements.com/products/nad-powder-50g) - 34.9 EUR
- [Energy Boost 60 tablets](https://fits-supplements.com/products/energy-boost-tablets) - 14.4 EUR
- [Cistus 400mg 60 capsules](https://fits-supplements.com/products/cistus-400mg-capsules) - 9.9 EUR
- [Neem 500mg 60 capsules](https://fits-supplements.com/products/neem-500mg-capsules) - 9.9 EUR
- [Black Cumin Seeds 300g](https://fits-supplements.com/products/black-cumin-seeds-300g) - 6.9 EUR
- [Immune System Boost 90 tablets](https://fits-supplements.com/products/immune-system-boost-90-tablets) - 12.9 EUR
- [Clove 2000mg 60 capsules](https://fits-supplements.com/products/clove-2000mg-60-capsules) - 9.9 EUR
- [Pau D'arco Strong 1200mg 60 capsules](https://fits-supplements.com/products/pau-d-arco-strong-1200mg-60-capsules) - 15.0 EUR
- [Nettle Leaf 200mg 60 capsules](https://fits-supplements.com/products/nettle-leaf-200mg-capsules) - 9.9 EUR
- [Organic Shiitake 250mg 60 capsules](https://fits-supplements.com/products/organic-shiitake-250mg-capsules) - 9.9 EUR
- [Cat's Claw powder 50g](https://fits-supplements.com/products/cat-s-claw-50g-powder) - 9.0 EUR
- [Licorice Root Strong 12000mg 60 capsules](https://fits-supplements.com/products/licorice-root-strong-90-capsules) - 11.9 EUR
- [Vegan Vitamin D3 1000IU 90 tablets](https://fits-supplements.com/products/vegan-vitamin-d3-1000iu-90-tablets) - 9.9 EUR
- [Olive Leaf 450mg 60 tablets](https://fits-supplements.com/products/olive-leaf-450mg-tablets) - 12.9 EUR
- [Rosehip Extract 2000mg 60 tablets](https://fits-supplements.com/products/rosehip-extract-2000mg-60-tablets) - 8.1 EUR
- [Nettle Immune Complex 8 in 1 60 tablets](https://fits-supplements.com/products/nettle-immune-complex-8-in-1-tablets) - 12.0 EUR
- [Black Pepper 20mg 30 tablets](https://fits-supplements.com/products/black-pepper-20mg-tablets) - 6.9 EUR
- [Organic Neem powder 200g](https://fits-supplements.com/products/bio-organic-neem-200g-powder) - 11.9 EUR
- [Organic Shatavari (Asparagus) powder 200g](https://fits-supplements.com/products/bio-organic-shatavari-asparagus-200g-powder) - 11.9 EUR
- [Organic Triphala powder 200g](https://fits-supplements.com/products/bio-organic-triphala-200g-powder) - 11.9 EUR
- [Triphala 800mg 60 capsules](https://fits-supplements.com/products/triphala-800mg-capsules) - 9.9 EUR
- [Organic Rosehip 300g powder](https://fits-supplements.com/products/organic-rosehip-300g-powder) - 12.9 EUR
- [Citrus Bioflavonoids 650mg 90 capsules](https://fits-supplements.com/products/citrus-bioflavonoids-650mg-90-capsules) - 12.9 EUR
- [Andrographis Extract 480mg 60 capsules](https://fits-supplements.com/products/andrographis-extract-480mg-60-capsules) - 11.9 EUR
- [Gymnema Sylvestre Strong 7400mg 60 capsules](https://fits-supplements.com/products/gymnema-sylvestre-strong-7400mg-60-capsules) - 11.9 EUR

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> Source: [FITS Dietary Supplements](https://fits-supplements.com/collections/immune-system)
> Updated: 2026-07-24