how do you know if you have metabolic acidosis?
Ph is specific to body compartment and body fluid. So, when making any reference to pH without making a clear statement as to where the measurement is taking place (urine, venous blood, arterial blood, saliva, and even specific organs. The stomach, small intestine and large intestine, for example, all have different optimal pH levels!
It has been argued by many that sprinting around the block once will produce a far greater shift in pH towards acidity than eating nothing but meat all day long. I have personally tested my own urine and saliva every hour for days on end and let me assure you, if you were to do the same, you would quickly find that what you do with exercise and how close you are to your needs for water consumption will influence your pH FAR more than what you eat. I've knocked my urine pH down from 7 to 5 in 10 minutes of squatting with sets of 10 on a one minute rest in just a few sets! You will produce plenty of CO2 that way.