A safer (and legal) way to accomplish the same thing is to use Leucine for the same purpose as insulin. Leucine is a ketogenic amino acid. It leads to a large (but within your own natural limits) insulin spike. If you don't consume any carbs 1 hour prior and up to 2 hours after ingesting leucine, your blood glucose will lower significantly, helping you reach ketosis faster.
And from 4 pm you only have protein and fat along with ingesting 5-10g of leucine every 2 hours (5 pm, 7 pm, 9 pm, 11 pm for example). The key is no carbs after 3-4 pm.
This will help you get into ketosis much faster and it will be both easier and more effective to diet down while in a low carb state.
Note that this method can be further enhanced by using supplements that enhance insulin sensitivity (R-ALA, fenugreek, fish oil, etc.), the first two ingredients being found in Biotest's Receptor Max and the third in Biotest's Flameout.