Knowledge

Easy-to-understand articles on micronutrients, sports nutrition and well-being — with sources from EFSA, DGE and peer review.

Learning paths

Guided series that walk you step by step through related topics — at your own pace.

4 partsMicronutrient basicsFour articles that build on each other: from micronutrient basics and how your body absorbs them to the B vitamins and what changes after 50.Start path 3 partsFit for trainingMagnesium, amino acids and how to read tiredness after sport: three articles on training and recovery — explained soberly, with sources.Start path

All questions & answersThe most frequent questions from all articles, answered concisely on one page.

Recommended starting points

Welcome to the VitalFit Knowledge Hub

What you'll find here and how we put content together — briefly explained. Sources from EFSA, DGE and peer-reviewed literature, checked and accessible.

2 min readRead

Vital-Check: How your individual micronutrient evaluation works

The free Vital-Check is about your daily routine, your diet and your goals — answer by WhatsApp or email with your personal evaluation.

5 min readRead

Vitamins, minerals & co.

(6)

What individual micronutrients do in your body — explained with sources from EFSA, DGE, and peer-reviewed research.

Vitamin D in winter: needs, intake and sensible amounts

Vitamin D is made in the skin via UV-B — in winter that's often not enough in Germany. What DGE recommends and when supplementing makes sense.

6 min read

Magnesium and muscle function: what the research shows

Magnesium contributes to normal muscle function (EFSA). DGE daily intake, intake forms compared, and when extra needs may apply.

6 min read

Iron and tiredness: what to keep an eye on in everyday life

Iron contributes to the reduction of tiredness (EFSA). DGE daily intake, heme vs. non-heme iron, and when to seek medical advice.

7 min read

Antioxidants and cell protection: what selenium, zinc and vitamin C actually do

Vitamin C, vitamin E, selenium, zinc: what antioxidants do, who has higher needs, and where to find them in food. EFSA-compliant overview.

8 min read

Omega-3 for heart function: EPA, DHA and ALA explained

EPA and DHA contribute to normal heart function from 250 mg per day (EFSA). Difference EPA/DHA/ALA, best sources, what to check when buying.

6 min read

B vitamins at a glance: B12, B6, folate and what they do

B vitamins contribute to energy metabolism and the nervous system (EFSA). What B12, B6 and folate do, and who needs more.

7 min read

In everyday life and every life stage

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Which building blocks can make sense in sport, after 50, or for specific needs.

Micronutrients after 50: which gaps actually show up in everyday life

Vitamin B12, vitamin D, calcium, iron: what changes after 50 in micronutrient supply, what to keep in mind, and when to see your doctor.

7 min read

Skincare from within: which nutrients actually support the skin

Vitamin A, biotin, niacin, vitamin C, zinc: what EFSA permits for skin, where to find these nutrients, and when an adjustment makes sense.

7 min read

Amino acids explained: BCAA, EAA, and protein needs in sport

What amino acids are, what BCAA and EAA mean, how much protein DGE recommends per day — and what real food covers without powders.

7 min read

Basics & first steps

(2)

How our individual evaluation works and what you should generally know about micronutrients.

Micronutrients — what your body actually needs

Vitamins, minerals, trace elements: what micronutrients are, which ones really matter day to day, and when supplementation actually makes sense.

7 min read

Bioavailability explained: how much of a nutrient your body actually absorbs

Bioavailability isn't only about quantity. What form, meal context, and individual factors do — and what to look for when buying supplements.

7 min read