Well, no, and yes. It's probably best if you spread your carbs out over the day, but it doesn't seem to do much harm if you don't.
Here's what Lyle McDonald says in his publication, The Ketogenic Diet: A Complete Guide for the Dieter and Practitioner:
“While the amount of insulin released from the ingestion of dietary carbohydrates is related to their quality (GI), it is also related somewhat to the quantity of carbs ingested. Ingestion of 30 grams of broccoli will cause a greater insulin release than the ingestion of 10 grams of broccoli although the GI is identical. One approach is to spread carbohydrate intake throughout the day in small amounts. While this may minimize insulin response, it should be noted that 5-6 grams of carbohydrate per meal is not much carbohydrate. Some individuals may wish to have all of their daily carbohydrate at one main meal, such as a large salad with dinner or lunch. Although this will cause a slightly greater insulin release than spreading out the same amount of carbohydrate throughout the day, the low GI of vegetables coupled with the digestion-slowing effect of protein, fat and fiber should prevent an excessive insulin response. Even if a large enough insulin response occurred to disrupt ketosis, it should be transient and ketosis should resume soon thereafter.” |