Even decaffeinated coffee contains a small percentage of caffeine (approximately equivalent to 3-5% of the original content) - this is not an opinion, but a fact based on the technologies used to produce decaffeinated coffee. Consuming such coffee does not cause caffeine addiction, as its content is too low for that. However, it is a fact that caffeine is not the only stimulating substance, and some of them remain in the product in certain amounts even after the decaffeination process. A certain form of dependency might be discussed in situations where a high number of cups of such coffee are consumed daily (e.g., 10 or more).
Coffee grounds are waste and should be treated as such. Consider their consumption as a health risk, as regular doses or larger quantities, due to the higher concentration of certain substances, can irritate the mucous membrane of the digestive tract. Scientific literature also indicates their ability to raise levels of total and LDL cholesterol, for which the compounds cafestol and kahweol are responsible.
During pregnancy, it is generally advisable to limit caffeine intake. Green tea is a source of this substance, so recommendations suggest monitoring the amount of this beverage as well. Compared to black tea, however, green tea contains less caffeine, and it also offers the benefit of antioxidant substances, so it is not necessary to eliminate green tea from the list of foods.
Regarding the influence of a mother's diet before conception on the child's gender, there is no scientific evidence to support this. The child's gender is determined genetically and is random. However, there are numerous studies indicating relationships and connections with external environmental influences, including the quality of diet (energy content, nutrient representation...), but these are not conclusive.
In the hydration regimen, fluids that serve the purpose of hydrating the body are typically included. However, this definition is not entirely straightforward, as, for example, coffee or tea contain substances with diuretic effects, which do not align with the concept of complete hydration. The issue with these beverages is that they do not have a diuretic effect on everyone, and their diuretic impact is highly individual. In such situations, it is naturally challenging to generalize, but these drinks are generally included in the hydration regimen (a similar issue arises with beverages containing alcohol). Broths are also usually considered part of the hydration regimen, but they are burdened by the factor of osmolality—if their "density" (i.e., nutrient content) is too high, they are categorized as food, not a fluid intended for hydration.
Guarana has fewer side effects than coffee, which may make it seem more advantageous in this regard. However, it is still a source of caffeine, which is better to avoid during PMS. As an alternative, try adaptogens; they have a significantly more favorable effect on the course of PMS.
While combining guarana with coffee does stimulate the nervous system and the cardiovascular system to higher activity, it also increases the risk of synergism in side effects. Even though it depends on the metabolic individuality of the person, i.e., in relation to caffeine, on the ability to efficiently metabolize this substance, try to avoid this combination as it unnecessarily stresses the entire organism.
Test the effects of adaptogens with ginkgo; it is a more advantageous route.
Caffeine does not function as a direct fat burner; its effect is indirect—it stimulates the activity of the autonomic nervous system, through which metabolic processes are accelerated. If physical activity is part of the weight reduction process, the likelihood that the entire process will proceed somewhat faster increases. However, do not expect any miracles in this regard, and consider the risk that caffeine may not work equally for every individual. With dietary supplements (fat burners), also take into account the caffeine doses contained, which are often many times higher than those in coffee in a single serving, leading to potential overdosing effects.
Consuming coffee on an empty stomach in the morning is not entirely a wise decision—the substances produced when coffee is over-roasted can irritate the mucous membrane of the digestive tract, and caffeine is absorbed quickly, increasing the body's stress responses.
Questions answered by
Mgr. Martin Jelinek
Lecturer and author of the educational system
Nutrition educator, lecturer, and author of the educational system and the ZOF learning application.
Mgr. Martin Jelínek has been systematically involved in nutrition education since 1999. He is the founder of ATAC, the educational company behind NutriCourses, and the author of an educational system focused on nutrition, healthy lifestyle, and the practical application of nutrition knowledge.
He graduated from the Faculty of Science at Masaryk University in Brno. Throughout his professional career, he has combined nutrition, education, and the practical application of acquired knowledge. His educational system also includes the ZOF (Zone of Optimal Functioning) learning application, where students turn theory into practical work with meal plans.
In 2007, he launched the first intake of a six-month course focused on the education of nutrition advisors. Over time, this course became the foundation for the further development of the educational system and a range of specialised courses.