View clinical trials related to Biological Availability.
Filter by:The goal of this interventional study is to to evaluate the oral bioavailability of the crystallized form of pterostilbene (ccPT) compared to its commercial free base form (pterostilbene (PT) in healthy volunteers. The main question it aims to answer are: • Do the crystallized forms of pterostilbene (ccPT) using two different encapsulation methods exhibit greater bioavailability than its commercial free base form (PT)? Participants will attend to four visits: a preselection visit (V0), a visit for the first postprandial study (V1), a visit for the second postprandial study (V2) after one-week washing period and a visit for the third postprandial study (V3) after another one week washing period. Researchers will analyze the three postprandial assays to determine which type of ccPT encapsulation provides the highest bioavailability compared to the commercial free base form (PT).
This trial is designed to compare the rate and extent of absorption of four different formulations of zavegepant. 52 healthy male and female volunteers will receive a single dose of each formulation at least 7 days apart over a period of about 7 weeks and the amount of drug in their blood will be assessed over the 24 hour period after each dose.
Oxidative stress and reactive oxygen species (ROS) can seriously affect cells, tissues and organs. The human body is capable of counteracting ROS production by stimulating antioxidant defense systems and consequently adapting to the oxidative challenge. Several transcription factors are involved in the induction of antioxidant genes. Activators of nuclear factor derived from erythroid 2 (NRF2), a protein that controls the expression of certain genes, are considered agents capable of inducing antioxidant capacity and to alleviate ROS. There are some food bioactive compounds, including polyphenols, capable of activating NRF2. Pterostilbene (PT) is a stilbenoid found in many natural sources, and is emerging as an antioxidant due to its potential preventive and therapeutic properties in a long list of diseases. Despite its apparent properties, the water solubility and bioavailability of PT are low. The co-crystallization of nutraceuticals is a recent strategy based on crystal engineering to overcome their low solubility and, therefore, their low oral bioavailability. It has been identified and characterized a cocrystal of pterostilbene that can increase oral bioavailability in animals by up to 10 times compared to the commercial free base PT. The main objective of the study is to evaluate the oral bioavailability of the crystallized form of pterostilbene (ccPT) compared to its commercial free base form (pterostilbene (PT). The secondary objectives of the study are to determine the pharmacokinetic parameters: - Relative oral bioavailability (Frel) - Maximum concentration (Cmax). - Maximum time (Tmax). - Half life time (T1/2). During the study there will be 3 visits: a preselection visit (V0), a visit for the first postprandial study (V1) and after one week washing period, a visit for the second postprandial study (V2).
The purpose of this study is to estimate the relative bioavailability (rBA) of nirmatrelvir/ritonavir oral powder in 3 different food vehicles relative to the Paxlovid® tablets under fasted condition in healthy adult participants, and to estimate the effect of food on the rBA of the nirmatrelvir/ritonavir oral powder formulation. The study will also assess the safety, tolerability, and palatability of nirmatrelvir/ritonavir oral powder in healthy adult participants.
The purpose of this study is to estimate the relative bioavailability of nirmatrelvir/ritonavir of 4 different FDC tablet formulations relative to the commercial tablet formulation under fasted conditions in healthy adult participants.
An open label, single-center, balanced, randomized, two-treatment, two-sequence, four-period, full replicate, crossover, single dose, Phase I, oral comparative bioavailability study in healthy, adult participants (male subjects and female subjects of non-childbearing potential) under fasting conditions with a screening period of 21 days prior to enrollment. In each study period, 21 blood samples were collected from each participant to analyze the pharmacokinetic profile of the test as well as the reference drug.
The bioavailability of cannabinoids differs greatly for different routes of administration. When applied topically to the skin, they are absorbed through the skin or hair follicles while interacting with receptors to provide localized effects. To gain more information on the potential of this route of administration in therapeutic applications, this open-label study will investigate the skin absorption and bioavailability of CBD and THC delivered trans-dermally.
Aluminum is a very abundant element in nature. Humans are exposed to this metal through the environment, diet, and drinking water, as well as through the consumption of certain medications. Aluminum is not an essential element for human, being able to become neurotoxic when it reaches the brain once ingested at very high doses and, above all, if there is also kidney dysfunction. Silicon is one of the most abundant elements on the planet and although it is not considered an essential element for humans, some beneficial activities have been documented. Silicon has been found to be readily available in food and that 41% of ingested silicon is excreted in the urine, with a significant correlation between silicon ingested with food and urinary silicon excretion. The most bioavailable silicon is that found in the form of silicic acid or orthosilicic acid. Numerous studies suggest that silicon can reduce the oral absorption of aluminum and / or improve its excretion and, therefore, protect against the adverse effects induced by the ingestion of aluminum. In a clinical study with healthy individuals as a control group for Alzheimer's disease, the levels of aluminum excretion were analyzed after the continuous ingestion of water enriched in silicon. The results in the first urine of the morning during the first week of ingestion of the enriched water showed that the excretion of aluminum was 136.9 ± 81.4 µmol / nmol creatinine while in the baseline week it was lower, 98.8 ± 64.3 nmol / nmol creatinine. These results indicated that the Al excreted came from Al stored in the body. The main objective of the study is to evaluate the effect of the consumption of three food supplements formulated with different silicon compounds (monomethylsilanetriol and / or silicic acid) on the urinary excretion of aluminum. The secondary objectives of the study are to evaluate: - the bioavailability of the silicon contained in three food supplements formulated with different silicon compounds. - the effect of the consumption of three food supplements formulated with different silicon compounds on urinary excretion of mercury, nickel, arsenic, cadmium, iron and copper. - the safety of the consumption of three food supplements formulated with different silicon compounds.
The aim of this cross-over study is to assess the bioavailability of hydroxytyrosol in healthy males after the intake of two olive watery extract supplements and one olive oil. Blood and urine samples will be collected before and after intake of the investigational products. Sample will be analysed regarding the level of hydroxytyrosol and preventing lipid peroxidation.
Commercially available fruit juices are obtained after applying industrial technologies to preserve and extend the shelf-life by inactivation of microorganism and enzymes. These are traditional thermal treatment (eg. pasteurization, sterilization) that causes losses of nutritional and bioactive compounds, changes physicochemical properties (colour, flavor and texture) and can modify their bioavailabilities. Thus, the traditional thermal processing is being replaced by less intense thermal technologies (e.g. low-temperature pasteurization / refrigerated storage) and non-thermal treatments such as the high-pressure processing (HPP) and the pulsed electric fields (PEF) as an alternative to enhace food safety and shelf-life without compromising organoleptic qualities (retain the flavour, color healthiness of fresh foods) and keeping their health-promoting capacity. The beneficial health effect derived from the orange juice intake is partly related to the bioavailability of their bioactive compounds. The aim of this study was to assess the effect of the intake of freshly squeezed orange juice (Citrus sinensis L.) and processed orange juice elaborated with different treatments (low pasteurization / refrigerated storage, high-pressure processing, pulsed electric fields) on the main serum carotenoid concentrations in a cross-over study in apparently healthy subjects using multiple dosis.