The phrase "absorption of caffeine" is correct and usable in written English.
It can be used when discussing how caffeine is taken up by the body after consumption, particularly in contexts related to health, nutrition, or pharmacology.
Example: "The absorption of caffeine can vary depending on factors such as the method of consumption and individual metabolism."
Alternatives: "uptake of caffeine" or "assimilation of caffeine".
Fig. 1 Absorption-time profiles of caffeine and testosterone permeation across the skin of Xenopus laevis.
Maximum speed of caffeine absorption across frozen skin was achieved within the first half hour, indicating an increased permeability of frozen skin to this test compound.
In the NIR region water absorbs strongly, the free spectral range is not wide and on the free spectral range available the absorption of aqueous solution of caffeine is not significant.
They are popular because of their fragrance, therapeutic applications, and lower content of caffeine, which could inhibit calcium absorption, particularly for older people [ 2, 3].
The maximum peak of absorption of the aqueous solution of standard caffeine was obtained by scanning the standard solution from 4000-400 cm−1 and the spectrum over the wavenumber range (2825 2982) cm−1 with a good absorption spectrum of standard caffeine was selected for quantitative determination.
Caffeine promotes the absorption of analgesics, including APAP, ASA, and IBU [38 40].
The absorption of the two chosen test compounds caffeine and testosterone representing a hydrophilic and a lipophilic substance, respectively, differed significantly.
This comparative study evaluated the effect of several experimental variables on the absorption of six model [14C]-labeled compounds (caffeine, cortisone, diclofenac sodium, mannitol, salicylic acid, and testosterone) through porcine skin.
A study using human volunteers found that ingestion or intraluminal jejunal perfusion of caffeine (75 300 mg) caused a rapid reversal of net fluid absorption to net secretion [40].
The mean cumulative dose absorbed by freshly excised dorsal skin did not increase as quickly as the other three absorption profiles by time, indicating that dorsal skin might be a greater barrier to permeation of caffeine than ventral skin.
