Do We Really Need Multivitamins?

Are multivitamin complexes a good addition to your health routine? Find out all about their benefits here.

3 MIN READ — 02/26/2025

Our bodies need a variety of vitamins and minerals to function at their best. Multivitamin complexes help ensure that you’re not missing out on essential nutrients—especially important if you lead an active, sporty lifestyle. Let’s have a closer look.

What Is a Multivitamin Complex?

A multivitamin complex is a type of supplement that contains multiple vitamins, not just one. They come in various forms—tablets, capsules, or even powders—and provide many essential nutrients that are crucial for your health and normal bodily functions. With just one product, you can fill several nutrient gaps at once. The main advantage of a multivitamin complex is its combination of different vitamins. Each product focuses on different areas, and they often include minerals to further enhance the formula.

Which Vitamins and Minerals Should Be in a Multivitamin Complex?

Typically, a broad range of vitamins and minerals are included in such products. Common vitamins you’ll often find are:

  • Vitamin A: Important for vision and skin health
  • Vitamin C: Also known as ascorbic acid; essential for the immune system, iron absorption, and collagen production
  • Vitamin D: Crucial for calcium absorption and bone health
  • Vitamin E: Protects cells from oxidative stress
  • Vitamin K: Important for bone health and blood clotting
  • Vitamin B1 (thiamine) / B2 (riboflavin) / B3 (niacin) / B5 (pantothenic acid): Play a role in energy metabolism, energy production, and skin health

Here are some minerals commonly found in a multivitamin complex:

  • Calcium: Essential for healthy bones and teeth
  • Magnesium: Supports muscle and nerve function
  • Zinc: Can boost the immune system
  • Iron: Important for energy production and oxygen transport

The daily nutrient boost recommended by experts

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Why It Makes Sense That There’s No Vitamin D Included

It’s not always necessary to include vitamin D in a multivitamin complex because our needs vary throughout the year. In summer, we’re exposed to plenty of sunlight, and our bodies can typically produce enough vitamin D on their own, thanks to the UV rays. However, things can change in the darker winter months. Factors like age and lifestyle also affect our vitamin D needs.

Why a Multivitamin Complex Should Be Part of Your Daily Routine

If you’re very active, work out regularly, or want to improve your fitness, your body has higher nutrient demands. You might not be able to meet these needs through diet alone. This is where multivitamin complexes come in—they provide the necessary supplementation where it’s needed. For example, they can support your immune system, help correct nutrient deficiencies, and promote overall health. They’re especially useful during times of stress, like exam periods or busy work schedules, when your body might temporarily require more nutrients. A multivitamin complex offers flexible support in these situations.

High-Dose Multivitamins: When Is a Higher Dosage Necessary?

Vitamins support various bodily functions even at normal dosages, but what happens when you increase your intake? Higher dosages can trigger additional effects that you might not notice with regular amounts. For instance, vitamin B3 (niacin) supports your energy metabolism in small doses, but in higher amounts, it can also help reduce cholesterol levels. Similarly, vitamin D maintains bone health, but in large doses, it can reduce inflammation in the body. While higher doses can be helpful for certain periods, it’s important not to overdo it.

Multivitamin Complex vs. Single Vitamins: Which Is Better for You?

Single vitamins are ideal if you know you’re deficient in a specific nutrient and need targeted supplementation. With single vitamins, you can focus on specific needs. Multivitamin complexes, on the other hand, cover a wider range of vitamins and can improve your overall nutrient intake. They also tend to be more cost-effective than buying individual vitamins. Ultimately, what’s better for you depends on your individual needs.

At a Glance

  • 01.

    Multivitamin complexes are a convenient way to take multiple essential vitamins and minerals that are vital for health and body functions, especially for active individuals.

  • 02.

    Since the body produces vitamin D when exposed to sunlight, it’s not always necessary to include it in multivitamin complexes—especially in the summer.

  • 03.

    Higher doses of certain vitamins can be beneficial in specific situations, like lowering cholesterol with vitamin B3. Multivitamin complexes, however, offer broader coverage and are often more affordable than single vitamins.

Article Sources

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 price per month for single subscription. The comparison prices are the average prices 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. 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.