Nutritional supplements

Not Just Vegans Affected Symptoms of Vitamin B12 Deficiency and How to Address Them

A vitamin B12 deficiency can go unnoticed for a long time. Learn about the signs to watch for and how you can improve your intake.

Expert Reveals Should You Take Magnesium Before or After Exercise?

Magnesium is one of the most important minerals—but how and when should you take it? An expert provides answers.

Nutrition Expert Explains 3 Supplements You Can Make at Home

Make Your Own Supplements at Home? It's Possible! FITBOOK Nutrition Expert Shares 3 Recipes.

Overview What Are the Different Forms of Magnesium and How Do They Work?

Poor sleep or cramps after exercising? Magnesium can help—and it's most effective in the right form.

Mineral Check Magnesium L-Threonate–A Natural Performance Booster?

A new supplement shows promising effects: Magnesium L-threonate appears to be a brain booster.

A study examined the effects of collagen on strength and muscles.

Analysis For Strength and Muscles: Is Collagen Better Than Other Proteins?

78 studies compared: only collagen and whey significantly improved strength and muscle. But which protein truly leads?

From Rejection to Routine: Halle Berry Now Relies on a Supplement

Hollywood star Halle Berry, 59, swears by this supplement—though she used to be afraid of it.

Long Rejected, Now a Staple: Why Halle Berry Uses a Supplement and What Changed Behind the Scenes

Effect on the Brain, Cells, and Muscles Certain Supplement Apparently Has an Effective "Longevity" Effect

There seems to be a lot of hype about creatine in longevity research. Can the supplement really help with longevity?

A daily intake of one gram of omega 3 can slow down biological ageing by up to four months.

Age Research Omega-3 Capsules as a Fountain of Youth? Study Provides New Findings

New findings show that daily omega-3 could slow down aging at a cellular level. What about vitamin D? FITBOOK examines the findings.

Joint Intake of Supplements How Vitamin D and Magnesium Work Together

Magnesium is essential for the activation of vitamin D. So, should you take these two supplements together?

Medicinal mushrooms, such as the pictured Reishi, have been used for centuries. Researchers are also interested in their potential effects.

"Highway to Health: A Study Overview" Certain Mushroom Supplements Affect Endurance and Recovery in Athletes

A meta-analysis examined the impact of medicinal mushrooms on athletes' endurance, immune system, and blood values.

Urolithin A is not found directly in pomegranates, but the ellagic acid contained in the fruit is a source for the formation of this compound.

"Highway to Health: A Study Overview" Pomegranate-Derived Compound Boosts Immune Defense in Middle Age

Taking Urolithin A strengthens the immune system. Here's how the compound, which is produced in part from consuming pomegranates, works.

There are various forms of supplements available for vitamin D intake.

Only 2 out of 25 Recommended Vitamin D Supply: 'Stiftung Warentest' Criticizes Supplements

Only 44 percent of people in Germany have adequate vitamin D levels. Why supplements are criticized.

Collagen's Typical Building Blocks Influence Biological Age

Longevity How Collagen Affects Biological Age, According to a Study

A new study shows that a specific combination of amino acids from collagen can reduce people's biological age.

Ashwagandha is a so-called adaptogen that can help the body manage stress.

"Highway to Health: A Study Overview" How Ashwagandha Affects Aging

A study examined how ashwagandha might affect aging. It focused on stress regulation, cognition, and physical performance.

Expert Explains Not Always Advisable: Who Should Avoid Combining Vitamin D and K2

Vitamins D and K2 are important for bone health. However, they don't necessarily need to be supplemented together.

Vitamin D Supplementation: Comparing D2 and D3

Study Provides Insights Is Supplementing With Vitamin D2 Perhaps Not as Healthy as We Think?

Vitamin D2 or D3—which to supplement? Studies show how their effects differ

Improving Endurance with Black Currant Extract?

According to a sports study Blackcurrant extract improves men's running performance

An extract from black currants may apparently improve running performance. The reason for this is believed to be anthocyanins.

Supplementing with vitamin B12 is important when there's a deficiency. However, it's always advisable to consult a doctor before starting any supplementation.

Dietary Supplements Effects, Dosage and Potential Risks of Vitamin B12 Supplementation

Who should take vitamin b12 supplements? What to consider? FITBOOK has the answers.

Magnesium Supplement Review: Comparing Forms, Differences in Effectiveness, Dosage, and Expert Recommendations

Buying Guide When Magnesium Supplements Are Useful and Which Products Are Recommended

Magnesium Supplements Compared: Which Forms Excel in Effectiveness, Bioavailability, and Tolerability?

Medications and vitamins should always be stored in a cool, dry, and dark place—kitchens and bathrooms are unsuitable for this.

Dietary Supplements Why You Shouldn't Store Vitamin C in the Kitchen or Bathroom

Dietary supplements are often stored in bathrooms or kitchens. Here's why you should avoid doing that with vitamin C.

The body cannot produce or store vitamin C long-term on its own. If levels drop too low, it can lead to various health issues.

Essential Nutrient Signs That May Indicate a Vitamin C Deficiency

Vitamin C is essential for our body. FITBOOK shares how to recognize a deficiency and what measures can help

Dietary Supplements with Turmeric for Diabetes

According to the study Turmeric Promotes Weight Loss in These Individuals

Why Diabetics May Benefit from Turmeric Supplementation, According to a New Study

L-theanine is said to have a relaxing effect while simultaneously enhancing performance.

Amino Acid Found in Tea Does L-Theanine Really Have a Calming Effect?

L-theanine promotes focus and calm. What studies reveal about its effects and what authorities say about supplements.

Study The Remarkable Effects of Omega-3 Supplementation in Strength Training

New Study Reveals Exciting Insights on How Omega-3 Supplements Affect Athletes' Performance

Woman Consumes Dairy Products for Her Bones

According to a Study Foods Women Should Eat for Bone Health

Dairy products are considered beneficial for healthy bones, even for children. A study shows that this is similarly true for women.

Also Known as Coneflower Taking Echinacea Correctly — When the Medicinal Plant Can Help

How does echinacea help with colds? FITBOOK provides an overview of its use, effects and scientific findings.

Can omega-3 fatty acids help with diabetes?

Study Omega-3 Fatty Acids Are Said to Be Able to Help with Diabetes

What influence do omega-3 fatty acids have on inflammation markers and blood sugar control in diabetes? A study has investigated this.

Caution! People with these pre-existing conditions should avoid omega-3 capsules

Omega-3 fatty acids are considered beneficial for heart health—however, not if you already have heart disease.

Girl Takes a Children's Dietary Supplement

Consumer Centers Experts Criticize Dietary Supplements for Children

They resemble candy, are overdosed—and experts suggest reconsidering the use of dietary supplements for children.