How to Combine Nutrients for Maximum Benefit

Why nutrient synergy matters—and how to make the most of it in your daily routine.

Reviewed by nutrition expert Jan Rein
5 MIN READ — 07/13/2025

For your body to function optimally, it needs a balanced intake of all essential nutrients. That includes macronutrients like protein, fat and carbohydrates—alongside a full spectrum of vitamins and minerals. But nutrients don’t work in isolation. They interact with each other—sometimes for the better, sometimes for the worse.

In this article, we’ll break down which nutrients enhance each other, which ones can interfere with absorption, and how you can make smart combinations to get the most out of your diet.

What Does Nutrient Synergy Mean?

Nutrient synergy refers to how nutrients can enhance each other’s effects when taken together. The combined effect is greater than the sum of their individual actions. But the opposite can also happen—when nutrients cancel each other out or reduce each other’s effectiveness, it’s called an antagonism.

The good news? When the ratio is right, many nutrients work better in combination than they do alone. Let’s look at how to make the most of that synergy in your diet.

What Are the Benefits of Nutrient Synergy?

So, how exactly do nutrients enhance each other? These are the key benefits:

  • Improved absorption in the gut
  • More efficient transport within the body
  • Better conversion into active forms
  • Enhanced recycling and reuse of nutrients

Which Vitamins Should Be Taken Together?

Some nutrients work best when taken in combination. Here are powerful pairs worth remembering:

  • Vitamin D + Calcium: Vitamin D helps your body absorb calcium from food
  • Zinc + Vitamin A: Zinc is needed to create the protein that transports vitamin A around the body
  • Vitamin C + Iron: Vitamin C (and other acids like citric acid) converts plant-based iron into a form your body can absorb more easily
  • Vitamin C + Vitamin E: Vitamin C helps regenerate vitamin E after it’s neutralised a free radical—restoring its antioxidant power
  • Vitamin B2 + Iron: Your iron metabolism depends on sufficient levels of B2
  • Copper + Iron: Copper supports iron transport in the gut and its conversion into haemoglobin
  • Folate + Vitamin B12: Folate needs B12 to be activated in the body
  • Protein + Calcium + Zinc: The amino acid histidine (found in protein) enhances the absorption of calcium and zinc in the gut

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Are There Negative Nutrient Interactions?

Just as nutrients can enhance each other, they can also interfere with each other’s absorption or function. These antagonisms can result in:

  • Competition for the same absorption pathways
  • Binding between nutrients that prevents uptake
  • Increased excretion of key nutrients

Here are some of the most common examples:

  • Iron, Copper, Zinc: Too much iron can block copper and zinc, as they compete for the same absorption route
  • Magnesium + Calcium: Excess calcium can hinder magnesium absorption
  • Magnesium + Protein + Fibre: High levels of protein or fibre can bind magnesium in the gut
  • Iron, Calcium, Zinc + Phytic Acid: Found in grains and legumes, this can bind minerals and reduce absorption
  • Iron, Calcium, Zinc + Tannins: Found in coffee, black tea and red wine—these can bind minerals and reduce uptake
  • Iron, Magnesium + Caffeine: Caffeine binds to these minerals and can inhibit absorption
  • Calcium + Oxalic Acid: Present in foods like spinach and rhubarb—can block calcium absorption and increase loss through stools
  • Zinc, Iron + Casein: Certain milk proteins may bind to these minerals and reduce absorption
  • Sodium + Magnesium: High sodium intake increases magnesium loss in the stool

How to Use Nutrient Synergy in Daily Life

Your body needs both macro- and micronutrients. And while it’s well known that too much fat or sugar isn’t ideal, it’s just as important to remember that “more” doesn’t always mean “better” with vitamins and minerals. These nutrients interact with each other—and imbalances can lead to reduced absorption or unwanted side effects.

The good news: nature already provides many foods in the right balance. A varied, whole-food diet usually covers your bases. But a few practical tips can help you get even more benefit from smart nutrient combinations—while avoiding the most common pitfalls:

  • Eat mostly plant-based? Pair iron-rich foods like whole grains, legumes, nuts or seeds with fresh veg, fruit, parsley or a splash of lemon juice. The vitamin C improves iron absorption. Same applies to iron supplements.
  • Taking iron? Wait before drinking coffee, red wine or black/green tea. Their tannins and caffeine can bind iron and block absorption.
  • Whole grains and legumes? These fibre-rich foods also contain phytic acid, which can bind to minerals like calcium, magnesium, iron and zinc. Cooking, soaking, sprouting or fermenting these foods helps reduce this effect.
  • Eat a lot of spinach, chard or sweet potatoes? These contain oxalic acid, which can limit absorption of calcium and magnesium. But soaking or boiling can reduce oxalate levels.
  • Using dairy often? Casein (a milk protein) may block iron and zinc, and calcium (though beneficial) can hinder magnesium uptake in large amounts.
  • Watch your salt intake. Too much sodium can lead to increased magnesium loss—and is linked to cardiovascular issues.
  • Want dairy-free nutrient synergy? Try wild rice and cooked carrots with a drizzle of oil (vitamin A + zinc), or porridge with nuts, flaxseed and melon.

Understanding these interactions is especially important if you take supplements. Combining single nutrients on your own can backfire—ingredients can interfere with each other if not properly balanced. Keep these guidelines in mind:

  • Copper, Zinc, Iron: Closely linked. Too much iron—especially from poorly formulated supplements—can lead to copper or zinc deficiency. Always consult a healthcare professional before taking iron.
  • Calcium + Magnesium: Aim for a 2:1 ratio (calcium:magnesium). If unsure, take them separately at different times.
  • Caffeine, tannins, alcohol, fibre: All can reduce mineral absorption. Avoid taking iron with coffee, tea, alcohol or high-fibre meals.

Whenever you’re taking vitamins, minerals or botanicals, don’t just think about their individual effects—think about how they work together. The most effective supplements mirror nature by combining nutrients in synergistic, bioavailable forms.

How AG1 Supports Nutrient Synergy

AG1 combines key nutrients in ways that support their absorption and function—because the right balance makes all the difference.

These nutrient synergies are built into AG1:

  • 01.

    Selenium and vitamin E work together as antioxidants—protecting cells from oxidative stress.

  • 02.

    Alpha-lipoic acid helps regenerate vitamin C and E—restoring their antioxidant power after they’ve been used.

  • 03.

    Zinc in AG1 supports the absorption and conversion of vitamin A (from both animal and plant sources). Specifically, it enables the enzyme that turns beta-carotene into retinol.

  • 04.

    Calcium and magnesium are present in a 2:1 ratio—considered an ideal balance to maximise their synergistic effects.

Who Reviewed This

Jan Rein

Nutritionist, food economist and author

Jan Rein is a trained nutritionist and economist, and the author of multiple books on gut health and metabolism. He shares weekly insights on his podcast Heißer Brei and is the author of The Fart Taboo: What Really Helps With Bloating (2017) and Proteins: Why We Need More of Them (2024).

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.

** Offer valid for new subscribers only. Free Shipping does not apply to customers in Switzerland and Norway.

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

ª 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.

⧘ Compared to individual supplements typically sold in retail, such as:
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 like spirulina, barley leaf, wheatgrass, dandelion, spinach powder, etc.), mushroom supplements (reishi, shiitake)

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

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. 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. Biotin 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.