Lactic acid is a very Catholic compound. By this, I mean that you will find it all over the place. It is the acerbic chemical that lends a tang to yoghurts, cheeses, and cured meats. Its acidity is what prevents the growth of fatal pathogens like botulinus in the latter.
It is often made from lactose, the sugar that resides in milk. This is from where it gets its name.
In human biochemistry lactate is an intermediate chemical that is produced by cells that are deprived of oxygen. It is produced all the time even in health, but is cleared from the circulation by the liver. When its rate of production exceeds its rate of clearance, then blood levels of it increase significantly.
If you are unfortunate enough to fall severely ill and end up in the resuscitation room of your local hospital, then the first blood test you get will be for lactate, among other things. A raised lactate is a CERTAIN indicator that your condition is very serious. There’s no faking it. If your doctor finds lactate in your blood then he must move heaven and earth to find the root cause of it, or risk losing the patient. It really is that simple.
I am sure that lactic acid was to be found in abundance in the Blood that dripped from the Body of Christ, as He hung from His Cross bleeding out and gasping His last breaths. I am certain of this. Its acidity and inner bitterness was what made Him gasp and cry out to His Father:
My God, My God, why have you forsaken me?
His blood loss and dehydration is what made Him say:
Dying is never easy. It is best done in good company, such as that of the Man who came back from the dead, and with His nursing/doctoring disciples.