I am very new to stata so bear with me..
I have conducted an experiment where we measure a hormone in the blood and because of large interpersonal variation, I have defined a new variable, “Change”, which is the difference in hormone concentration in a given person between 2 treatments. I total I have 3 treatments (control, diet 1, diet 2). Some patients received the control and diet 1, others control and diet 2, or diet 1 and diet 2.
Now I want to see if there is significant difference between the different diets, using my variable “Change”. A statistician recommended to find the 2-sided p-value for pair equal to 0, using ANOVA.

Can anyone help with a command for that? I want to know the p-value for each group of “double-treatments”, e.g. control and diet 1, control and diet 2, and diet 1 and diet 2.

I tried:
oneway Difference Difname, tabulate bonferroni
But it doesn’t seem right.
Anyone who can help?