A Supplement to Build Your Immune System

Every day your body responds to training, work, weather and everything else life brings your way. A varied, balanced diet helps you stay resilient and feel your best.

Supplements like AG1 are designed to support your daily routine with a comprehensive blend of nutrients for your immune system – all in one scoop.¹

Why Immune Health Matters

When your immune system isn’t at its best, you don’t feel your best.

Your immune system is one of your body’s most important foundations – working every minute of the day to keep you balanced, steady and ready for whatever life brings. And when that system feels challenged, it can affect everything: your energy, your focus, your motivation and your ability to show up at your best.

Supporting your immune system means giving your body what it needs to stay strong and responsive, so you can think clearly, move with purpose and be present for the people and moments that matter. Because when your immune system is supported, you feel supported – grounded, capable and ready to take on your day.

The Building Blocks of Your Immune System

Your immune system is always working in the background. And while it’s incredibly capable, it relies on simple, everyday habits to function at its best. The way you nourish your body, how you move and how well you rest all play a role in supporting this essential system.

Nutrition

Your body relies on a wide range of vitamins and minerals to keep its natural defence processes running smoothly – including nutrients like vitamin C, zinc, selenium and others that contribute to the normal function of the immune system.¹

Movement

Regular movement helps support overall well-being, circulation and metabolic processes that keep your body functioning at its best. It doesn’t have to be intense – even light, consistent activity can help your body stay resilient and responsive.

Sleep

Quality sleep is one of the most powerful ways to support your immune system. During rest, your body carries out essential recovery processes that help maintain balance and prepare you for the next day.

How a Daily Supplement Can Support Immune Function

Complements a balanced lifestyle
Supports nutritional consistency
Provides key immune-supporting nutrients¹
Offers convenience & peace of mind

How Your Immune System Works

To understand what your body needs, let’s first look at how your immune system operates – and why it relies on essential nutrients to do its job.

Your immune system starts with physical and chemical barriers – like the skin, mucous membranes and the gut lining – that block unwanted substances from entering. These surfaces are supported by enzymes, beneficial microbes and immune-active molecules that form your body’s initial shield.

Why this stage matters

Functioning, intact barriers reduce pressure on the rest of the immune system. Nutrients such as biotin (which helps maintain normal mucous membranes) and zinc and copper (which support normal immune function) help keep these defences working effectively.⁷ ¹

What you can do

Stay hydrated, support your gut with balanced nutrition and maintain consistent micronutrient intake to support these frontline barriers.

If something gets past its initial barriers, your body reacts quickly with broad, non-specific responses. These mechanisms act fast and don’t need prior learning – helping your body stay steady while other parts of the immune system prepare more targeted support.

Why this stage matters

These quick reactions give your body time to prepare more specialised support. Nutrients such as vitamin C, zinc, selenium and copper contribute to normal immune function and help protect cells during these high-demand moments.¹ ³

What you can do

Prioritise rest, manage stress and get steady intake of immune-supporting micronutrients so your body is ready to respond when needed.

Your adaptive immune system learns from experience, builds targeted responses and creates immune “memory” that helps your body respond more effectively in the future. Communication between immune cells helps coordinate these tailored responses across tissues.

Why this stage matters

This stage is central to long-term resilience. It relies on the formation of new immune cells and precise signalling. Nutrients such as folate, vitamin B6 and vitamin B12 support normal cell division and immune function, helping your adaptive system stay efficient and well-regulated.¹ ³

What you can do

Support this stage with consistent nutrition, movement, stress management and sleep – and ensure daily intake of nutrients that contribute to normal immune function and cell turnover.

After the immune system responds, it shifts into recovery mode. This phase clears out what’s no longer needed, restores balance and prepares your system for what comes next. Much of this restoration happens during sleep.

Why this stage matters

Recovery keeps your immune system strong, stable and ready for everyday challenges. Nutrients such as vitamin C, zinc and selenium help protect cells from oxidative stress during this phase and support normal immune function.¹ ³

What you can do

Prioritise sleep, hydration and steady micronutrient intake to help your body restore, reset and stay resilient.

These Essential Nutrients Support Your Immune System
AG1 includes vitamins and minerals that contribute to the normal function of the immune system – every day.
VITAMIN C
Vitamin C supports various cellular functions of the immune system, helps the ability of immune cells to respond, and protects them from oxidative stress.¹ ³
ZINC
Zinc is crucial for the development and function of innate and adaptive immune cells, supports normal cell signaling in the immune system, and protects cells from oxidative stress.¹ ³
VITAMIN B12
Vitamin B12 plays a key role in the production of new immune cells by facilitating DNA synthesis, and helps maintain normal energy metabolism.¹ ²
VITAMIN A
Vitamin A helps maintain the structure and function of mucosal barriers (like the gut and respiratory lining) and supports the development and function of immune cells such as T-cells.¹ ⁷
VITAMIN D
Vitamin D contributes to the normal function of the immune system by supporting the activity of immune cells such as T-cells and macrophages, and helps regulate immune responses to keep them balanced and effective.
VITAMIN B6
Vitamin B6 is required for the formation and activity of immune cells and supports the production of signaling molecules that help coordinate immune responses.¹
FOLATE
Folate is essential for the production of fast-dividing immune cells and enables DNA synthesis for the body to form new immune cells efficiently and respond to challenges.¹
COPPER
Copper supports the activity of immune cells, contributes to the formation of connective tissue barriers, and plays a role in antioxidant defense.¹ ³ ⁵
SELENIUM
Selenium supports the production of antioxidant enzymes that protect immune cells from oxidative stress and contributes to the normal function of immune cells.¹ ³

CLINICALLY TESTED BIOAVAILABILITY

Not all nutrients are absorbed equally. Your body can only benefit from nutrients it can properly absorb, so the form they come in matters.

In several clinical trials, AG1 was shown to

  • improve key nutrient levels like vitamin C within 3 months.ᵃ
  • enrich the gut microbiome with friendly bacteria.ᵃ⁻ᶜ
  • provide key nutrients that were quickly and easily absorbed into the body.ᵈ
Try AG1 Now

Try AG1 Now

AG1 Pouch (30 Servings)
2,90 €/serving
87€
FIRST TIME PURCHASE INCLUDES:
Welcome Kit
AG1 Shaker, Scoop, and Canister
Free
28€
AG1 Travel Packs (5 count)
5 individual servings
Free
17€
Vitamin D3+K2 Drops
1 Bottle
Free
24€
Total
87€
156€
Update or cancel anytime
30 days money-back guarantee

Ask an Expert

Because immune health can feel complex, we asked one of our experts to break it down. From how your immune system actually works to the role nutrition, sleep, stress and daily habits play, here are nutrition expert Dr Georg Abel's clear, science-informed answers to the questions people ask most.

Can poor nutrition cause a weak immune system?

What can I do when I feel a cold come on?

Why is consistency important for immune-supporting nutrients?

How do lifestyle factors like sleep, stress and movement influence immune health?

Is it true that 70% of your immune system is in your gut?

Stay one scoop ahead with AG1

Your daily nutrient boost to support immune function, energy and more¹ ²

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Food supplements are not a substitute for a balanced and varied diet and a healthy lifestyle. Do not exceed the indicated daily intake. Keep out of reach of children. Please inform and consult your doctor before consuming this product. Not suitable for children and adolescents under 18 years, pregnant or breastfeeding women. Refrain from taking other food supplements containing zinc. Persons taking anticoagulant medication should seek medical advice before consuming vitamin K-containing supplements.

* Genuine reviews from customers who received a review link after purchase.

** Discount applies to the first month when subscribing. Thereafter, monthly subscription will cost full price. Offer only for new subscribers, for limited time only. Free Shipping does not apply to customers in Switzerland and Norway.

º Food Supplement. In combination with a healthy diet and exercise.

⟡ Survey on the awareness of multi-nutrient powders with 211 consumers aged 18 to 49 in Germany, 09/24.

↡ Survey of 527 AG1 customers after 12+ days of use, 2024. The survey was conducted on a previous version of AG1’s continually evolving formulation. The survey results can be transferred to the current version of the formula due to no or scientifically negligible changes in supporting nutrients. Vitamins C, B6, B12, riboflavin, niacin, pantothenic acid, and folate help reduce tiredness and fatigue. Pantothenic acid supports mental performance. Calcium supports normal digestive enzyme function, while biotin maintains normal mucous membranes, such as the gut lining.

◊ Comparison (2025) with individual supplements in comparable amounts that are typically sold at retail: vitamin B complex, vitamin A, vitamin C, vitamin E, bacterial cultures, zinc, magnesium, calcium, selenium, chromium, manganese, molybdenum, coenzyme Q10, greens powders (from sea algae such as spirulina, barley leaf, wheatgrass, dandelion, spinach powder, etc.), mushroom supplements (reishi, shiitake).

⬥AG1 monthly price for single subscription (89€) calculated down to 30 daily portions. The comparison prices are the average prices per daily portion of three individual products (where available) available online in September 2025 (sample selection) for each compared category, each with identical ingredients. To ensure a fair basis for comparison, where the comparison products have different dosages, the prices were mathematically adjusted to correspond to the dosage contained in AG1. The amounts for the B complex may vary slightly. For the greens powders and the mushroom complex, the prices were compared per daily dose, quantities and ingredients vary and are not 100% identical.

‡ Survey of 144 verified customers from 12 European countries who have been taking AG1 for an average of 9 days.


Research Studies
a. In a triple-blind, randomised, placebo-controlled parallel-designed clinical trial evaluating nutrient biomarkers and microbiome shifts in 105 healthy adults ages 20-59 over the course of 12 weeks.
b. In a double-blind, randomised, placebo-controlled 2-week cross-over clinical trial assessing microbiome shifts in 20 active adults ages 19-37.
c. In a double-blind, randomised, placebo-controlled 2-week cross-over clinical trial assessing microbiome shifts of 24 healthy adults with occasional GI distress ages 26-59.
d. In a double-blind, randomised, placebo-controlled cross-over clinical trial assessing bioavailability in 16 healthy adults ages 18-42 over the course of 8 hours.
The studies were conducted on a similar version of AG1's continually evolving formulation. The transferability of the study results is ensured because of comparable ingredients and amounts.

Immune System

1: With vitamins A, C, B6 and B12 as well as folate, zinc, copper and selenium, AG1 contributes to the normal function of the immune system. Vitamin C contributes to maintain the normal function of the immune system during and after intense physical exercise.

Energy; Metabolism

2: Vitamins C, B6, B12, riboflavin, niacin, pantothenic acid and magnesium contribute to normal energy-yielding metabolism and to the reduction of tiredness and fatigue. With vitamins C, B6, B12, as well as thiamine, riboflavin, niacin, biotin, pantothenic acid, calcium, phosphorus, copper and manganese, AG1 contributes to normal energy-yielding metabolism. Magnesium contributes to electrolyte balance. Biotin, zinc and chromium contribute to normal macronutrient metabolism.

Cell Protection

3: With vitamins E and C as well as riboflavin, zinc, copper and selenium, AG1 contributes to the protection of cells from oxidative stress. Phosphorus contributes to normal function of cell membranes. Folate, Vitamin B6 and B12 contribute to normal homocysteine metabolism.

Mental Performance; Psychological Function; Nervous System

4: With pantothenic acid, AG1 contributes to normal mental performance. Zinc contributes to normal cognitive function. With vitamins C, B6, B12, B1, B3 and B7 AG1 contributes to normal psychological function and to normal functioning of the nervous system. Calcium contributes to normal neurotransmission.

Skin, Hair & Nails

5: With vitamins A, as well as riboflavin, niacin, biotin and zinc, AG1 contributes to the maintenance of normal skin. Vitamin C contributes to normal collagen formation for the normal function of skin. Copper contributes to normal connective tissue. Vitamin B7, zinc and selenium contribute to the maintenance of normal hair. Zinc and selenium contribute to the maintenance of normal nails.

Hormonal System

6: With vitamin B6, AG1 contributes to the regulation of hormonal activity. Zinc contributes to the maintenance of normal testosterone levels in the blood. Selenium contributes to the normal thyroid function. With chromium, AG1 contributes to the maintenance of normal blood glucose levels.

Digestion

7: Calcium contributes to the normal function of digestive enzymes. With vitamin A, biotin, riboflavin and niacin, AG1 contributes to the maintenance of normal mucous membranes (e.g. intestinal mucosa).

Muscles

8: With calcium and magnesium, AG1 contributes to normal muscle function.