The effects of heating meat products cured with nitrite have been investigated. The previously cited study, "Effect of Frying and Other Cooking Conditions on Nitrosopyrrolidine Formation in Bacon," by J.W. Pensabene, et al., indicated that when bacon was fried at 210 degrees F for 10 minutes (raw), 210 degrees F for 105 minutes (medium well), 275 degrees F for 10 minutes (very light), or 275 degrees F for 30 minutes (medium well), no conclusive evidence of nitrosopyrrolidine could be found. But when bacon was fried at 350 degrees F for 6 minutes (medium well), 400 degrees F for 4 minutes (medium well), or 400 degrees F for 10 minutes (burned), nitrosopyrrolidine formation was conclusively found at 10, 17, and 19 parts per billion. Thus, well done or burned bacon probably is potentially more hazardous than less well done bacon. Bacon cooked by microwave has less nitrosamine than fried bacon. Consumers should cook bacon properly.
So if you intend to boil the bacon, sodium ascorbate is not essential, if you are going to fry it. I would recommend adding sodium ascorbate.