No, they did a super small random pilot study. Here is the section from the actual paper on the results: In the FMD subjects, fasting blood glucose levels wer

No, they did a super small random pilot study. Here is the section from the actual paper on the results: In the FMD subjects, fasting blood glucose levels were reduced by 11.3% ± 2.3% (p < 0.001; FMD) and remained 5.9% ± 2.1% lower than baseline levels after resuming the normal diet following the third FMD cycle (p < 0.05; Figure 6B). Serum ketone bodies increased 3.7-fold at the end of the FMD regimen (p < 0.001) and returned to baseline levels following normal food intake (Figure 6C). Circulating IGF-1 was reduced by
24% by the end of the FMD period (p < 0.001) and remained
15% lower after resuming the normal diet (p < 0.01; Figure 6D). IGFBP-1 was increased 1.5-fold at the end of the FMD regimen (p < 0.01) and returned to baseline levels following normal food intake (Figure 6E). These results indicate that the FMD group was highly compliant and generally did not consume foods not included in the FMD box provided to them.