Greetings RW! Even ketogenic guru Lyle McDonald thinks that low carb is the wrong way to go for gaining mass. Here’s a quote from the man himself.
"One must remember that few dietary studies looking at LDL or HDL have examined subjects during weight maintenance (they tend to look at changes while the subject is actively or passively losing or gaining weight). This adds a confounding factor that has to be taken into account.
During weight loss, blood lipids tend to improve regardless of diet. This makes sense, the body is in an overall catabolic state so there tends to be decreased production of most substances including cholesterol in the liver. Both high and low fat studies are guilty of not looking at changes in blood lipids after weight loss has ceased and weight maintenance is attained.
Incidentally, the one or two studies of ketogenic diets which showed no weight loss or even weight gain did show fairly negative changes in lipid profile. This is especially important for those who want to use ketogenic diets as weight gains diet (something I absolutely don’t recommend by the way).
Basically, if you do a keto diet and don’t lose weight (or even gain weight), odds are things will get worse. I point this out in my book because it’s a known fact. That is, if you lose weight/fat on a keto diet, odds are your blood lipid profiles will improve, if you don’t, odds are they’ll go into the toilet which is bad.
Incidentally.2, when one considers the effects of dietary fat on blood lipids or risk factors, you have to take into account whether weight is being maintained, gained or lost. A recent study in cyclists showed that a fat intake of 50% caused no detriment in blood lipid profile AS LONG AS they were in caloric balance. That is to say, dietary fat has a differential effect on blood lipids and risk factors depending on whether you’re losing, gaining or maintaining weight. That’s even ignoring the difference impact of different types of fat on blood lipids."