In the absence of oxygen, the pyruvates are fermented into lactate, which recycles NADH into its oxidizing form, NAD+. If oxygen is present, the cell can reap much more energy through the oxidative decarboxylation of pyruvate and the citric acid cycle. Pyruvate at the Crossroads A cell can use the product of glycolysis, pyruvate, in several metabolic pathways besides decarboxylation.
Turns out the old notion of eating a meal every three to four hours to ramp up oneâs metabolism wasnât exactly perfect advice. In fact, how frequently someone eats has little to do with the speed of their metabolism.
Your metabolism will slow down and your body may only need to burn 1500 calories a day to maintain your new weight soâ¦. If you eat keep eating 1500 calories per day when your metabolism only burns 1500 calories at your new low weight of 130 pounds thenâ¦. You're going to maintain your weight or lose weight at a much slower rate than when you first started on your 1500 calorie diet when your metabolism burned 2000 calories per day soâ¦.