This work is organized in the following way. First, we employ static 2 H nuclear magnetic resonance (NMR) to determine under which conditions C20d and C30d can crystallize in phospholipid membranes. In general, the shape of the 2 H NMR spectrum depends on the dynamics and geometry of a C-D bonds motion . Fast, isotropic motions result in a single, narrow peak. This is the case for liquid nalkanes . Anisotropic motions, such as those of n-alkanes inside lipid bilayers, produce broader spectra . As will be seen, liquid (an)isotropic, rotator, or crystal phases result in very distinct spectral shapes and thus 2 H NMR is a powerful tool to determine the presence and phase of n-alkanes inside lipid membranes. We then examine the crystallization properties of C30 in a DMPC bilayer in more detail by comparing temperature-dependent NMR measurements with differential scanning calorimetry (DSC). We also remark on the effect of sample hydration and compare the crystallization kinetics of C30 in the membrane environment with bulk n-alkane.