
Testosterone Gel & Blood Tests: Apply Before or After?
Should you apply testosterone gel before a blood test? Why timing changes your result and how to keep your values comparable over the years.
How can you become healthy? How can you stay healthy? Holistic physician and author Dr. med. Katja Aschenbrenner shares insights from her practice about modern integrative medicine, gut health, hormones, Ayurveda, and everything that keeps us vibrant and alive — for everyone who wants to understand their health and strengthen their vitality in a sustainable way.

Should you apply testosterone gel before a blood test? Why timing changes your result and how to keep your values comparable over the years.

Studies suggest that up to 17–20% of the population may be affected by Mast Cell Activation Syndrome (MCAS). Learn what symptoms can be behind it, what triggers it, and how MCAS is diagnosed and treated.

Dr. Katja Aschenbrenner featured as an expert in FÜR SIE, issue 16/2026: how to identify and treat food intolerances such as lactose, fructose, or histamine intolerance holistically.

Tick bites are often underestimated. Learn why not only Lyme disease and TBE, but also other pathogens such as Bartonella or Babesia can cause long-term symptoms. We explain which warning signs you should take seriously after a tick bite and how to protect yourself effectively. For greater safety during tick season!

Testosterone deficiency (Low T) affects more than libido, contributing to weight gain, brain fog, low energy, and mood changes. Early diagnosis and modern treatments like bioidentical gels can help restore balance and improve quality of life.

I have been caring for patients with these conditions for years. As a result, I have learned a great deal. At the beginning, I could not have imagined what terrible — even fatal — illnesses these are. Moreover, due to a lack of research or …

Greater celandine grows along roadsides and is regarded by most people simply as a weed. In fact, greater celandine is a medicinal plant. In the video, I show you how to obtain the valuable yellow-orange milky sap that can be applied to warts.

Proteins are the building blocks of our body: without them there would be no muscles, no immune defense, and no enzymes. Nevertheless, opinions vary about how much we need each day. The German Nutrition Society (DGE) recommends for healthy adults …

In my last blog post, I reported on the symptoms that occur during perimenopause and menopause. In it, I also mentioned the possibility of treating menopausal symptoms with bioidentical hormones.

I gave an interview to the health website medpertise.de on the holistic approach to food intolerances.

I gave an interview to the health website medpertise.de about the holistic view of food intolerances.

I recommend starting when symptoms occur during perimenopause or menopause, for example sleep disturbances, exhaustion, or irregular bleeding.

ME/CFS is a severe neuroimmunological multisystem disease. The German Society for ME/CFS states that around 250,000 people in Germany are affected, including 40,000 children. Worldwide, the number is about 17 million.

Dr. Aschenbrenner is co-author of the study “Utility of Glucagon-Like Peptide-1 Receptor Agonists in Mast Cell Activation Syndrome”, published in “The American Journal of the Medical Sciences.”

If we have too much uric acid in the body, the disease gout can develop. Gout manifests itself, among other things, through very painful, reddened, and swollen joints, especially in the toes and fingers. The big toe is often affected.

From my perspective, it is very important that children already experience how good freshly cooked food tastes and how important it is for their health. What you learn as a child is often never forgotten. Children can help out and gradually learn to cook on their own.

The relationship between histamine and sex hormones is complex and bidirectional. On the one hand, hormones can influence the release and effects of histamine in the body. On the other hand, histamine can also affect the production and function of hormones.

Many women with histamine intolerance or mast cell activation syndrome (MCAS) notice that their histamine-related symptoms change during the menstrual cycle or during periods of hormonal transition (e.g., pregnancy, menopause).

Hormone replacement therapy is usually abbreviated in the literature as “HRT” (English: “Hormone Replacement Therapy”). When specifically referring to hormone replacement therapy …

Azelastine is an active ingredient that has been used for decades to treat hay fever. Many over-the-counter nasal sprays contain azelastine. A new study from Saarland University now provides indications that azelastine nasal sprays can do more than just relieve allergies.

Calculate it for yourself! Inhaltsverzeichnis Introduction Tools for Calculating Life Expectancy There are online tools that allow you to calculate your own life expectancy. I
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