He cites this article, in
which obese subjects on a high - protein and low - carb diet had lower levels of butyrate in their bodies and intestines, likely due to decreased diversity in their guts.
Not exact matches
More than half of the investigated sexually active
obese diabetic women and men complained about sexual dysfunction,
which is much higher than in healthy lean
subjects (342, 343).
On the other hand, an inverse correlation between plasma adiponectin levels and insulin sensitivity is seen in
obese and diabetic
subjects,
which tends to be somewhat more pronounced in women (45 — 47).
Secondly, bitter taste stimulates the secretion of polypeptide YY (PYY),
which reduces food intake in
subjects of normal weight, so researchers decided to test the effects of the peptide infusion on the appetites of 12
obese and 12 lean
subjects in a double - blind, placebo - controlled crossover study.
It is possible that the subcutaneous fat,
which is known to store vitamin D3, sequestered more of the cutaneous synthesized vitamin D3 in the
obese than in the nonobese
subjects because there was more fat available for this process.
A more formal study that did evaluate the effects of a ketogenic diet confirmed the efficacy of carbohydrate restriction: in a small prospective cohort,
obese subjects began a ketogenic diet after undergoing a 24 - hour esophageal pH probe test (
which measures the pH of the esophagus).
These results concur with studies on human patients,
which report a decrease in insulin sensitivity of between 44 and 72 % in
obese subjects compared with normal - weight control
subjects (34 — 37).