The objective of this research was to assess a new rumen-protected Met supplement (EBMet) for rumen undegradability, intestinal and total-tract CP digestibility and blood plasma AA response. EBMet contains 34% DL Met coated with saturated FA. Statistical analysis was done using JMP and means compared using Student’s t-test (Significance at P < 0.05). In study 1, EBMet samples were incubated in the rumen of 2 cannulated cows for 16 h. Rumen undegradable N (RUN, % of N) content of EBMet was determined to be 91.8% (SEM = 0.38). In study 2, using 2 steers fitted with rumen and duodenal cannulas, the RUP, intestinal digestibility of RUP (dRUP), and total-tract CP digestibility (TTCPDig %) of EBMet were determined with the mobile bag technique and Soypass as a reference. RUP was not different between EBMet and CON (91.3 vs. 102.7, SEM = 2.79) nor was dRUP (98.9 vs. 100.0, SEM = 0.36) or TTCPDig (99.0 vs 100.0, SEM = 0.30). Study 3, a completely randomized design, measured plasma AA in 8 lactating Holstein cows (DIM 126 ± 19, MY 42.4 kg/d, Parity = 2). Four cows were fed a diet with no Met supplementation (0Met) and 4 cows fed the same diet with 170 g/d of EBMet. Diets were fed for 5 d and blood from the coccygeal vein was collected at 1000, 1200, 1400, and 1600 h on d 5. Plasma Met (μg/mL) was 3.29 in EBMet fed cows and higher (P < 0.05) than the 2.78 of 0Met fed cows (SEM = 0.15). Met as % of Total AA (1.10 vs. 0.91, SEM = 0.03) and % of Essential AA (2.29 vs. 1.91, SEM = 0.08) was higher (P < 0.05) for EBMet than 0Met fed cows. In study 4 on a commercial farm in Minnesota, ­8 Holstein cows (DIM 117 ± 56, MY 39.6 kg/d, Parity = 2.1) were fed a CON diet (no Met supplementation) for 7 d followed by 7 d of CON with EBMet (170 g/d). Blood from the coccygeal vein was collected on d 7 of each feeding period at 1000 and 1400 h. Cows fed EBMet had higher (P < 0.05) concentration of plasma Met (μg/mL) (3.27 vs. 2.81, SEM = 0.12), Met as % of Total AA (1.37 vs. 1.03, SEM = 0.04) and Met as % of Essential AA (3.25 vs. 2.35, SEM = 0.10) than CON fed cows. Data suggests EBMet is a highly metabolizable Met source as shown by RUP, dRUP, TTCPDig exceeding 90.0% and increased plasma Met concentrations in vivo.