In dairy cattle, ketosis is a common ailment that usually occurs during the first weeks after giving birth to a calf. Ketosis is in these cases sometimes referred to as acetonemia. A study from 2011 revealed that whether ketosis is developed or not depends on the lipids a cow uses to create butterfat. Animals prone to ketosis mobilize fatty acids from adipose tissue, while robust animals create fatty acids from blood phosphatidylcholine (lecithin). Healthy animals can be recognized by high levels of milk glycerophosphocholine and low levels of milk phosphocholine.[76] Point of care diagnostic tests are available and are reasonably useful.[77]

If you’re following the keto diet, you will need protein, but you should limit your intake to about 20 percent of your total daily calories. (1) This is important because when you consume more protein than you need, your body converts the excess protein into carbs through a process called gluconeogenesis. This process pushes your body out of ketosis.

Ideally, you combine supplemental ketones with a relatively low carb diet, especially if metabolic efficeincy is important to you. HOWEVER, you can achieve most of the benefits of ketosis aside from the fat burning efficiency by using exogenous ketones. So it all depends on how lean you are, what's important to you from a performance vs. fat loss standpoint, etc.
For patients who benefit, half achieve a seizure reduction within five days (if the diet starts with an initial fast of one to two days), three-quarters achieve a reduction within two weeks, and 90% achieve a reduction within 23 days. If the diet does not begin with a fast, the time for half of the patients to achieve an improvement is longer (two weeks), but the long-term seizure reduction rates are unaffected.[44] Parents are encouraged to persist with the diet for at least three months before any final consideration is made regarding efficacy.[9]
Hi Mel, Assuming that your ranch dressing doesn’t have sugar added, you don’t need to worry too much about limiting it, but within reason. This is my homemade ranch dressing recipe, which has 0.9g net carbs per 2-tbsp serving. It would be hard to find a store bought one with much less than that, even though some round anything less than 1g down to 0g, which isn’t truly accurate. Also, keep in mind that if weight loss is your goal, some people find that too much dairy can cause a stall. Finally, make sure you aren’t using all your “available” carbs on ranch dressing – have it with some low carb veggies!