John Sampson
Cow's milk is only good for baby cows!
I drink rice milk with meals nowadays. I put 3.5% in my coffee at work.Maybe I should go back to drinking skim like I did before.
Did they use pure milk from cows not subjected to antibiotics and hormones? I assume that the milk used was commercially processed and prepared. This study should have been done with pure milk, not the Frankenmilk we have in our stores today.
Does this also apply to all milk products, yogurt, cream cheese, sour cream, cheeses?
(Echo): Cow's milk is for baby cows. Are they steroid/hormone free? Mother's milk is for kids - (Me) Milk is a great beverage once in a while. - Or ice cream.. But sorry, not as a steady diet. Ever since the FDA has been shredded by the current administration. I don't trust food anymore.. Period..
The story did not mention whether the study accounted for cheese in the diet. Since cheese is a concentrated version of milk, the study wouldn't be worth much if the subjects consume a significant amount if cheese, as a separate food or as part of other foods, e.g., pizza. The omission could be very significant.
Lumir Janku
Another study has shown that the lack of fatty acids in skim milk leads to an increased probability of the onset of alzheimers. Therefore, you live longer, but not remembering much if anything at all and thus annoying the heck of all others for 4-5 more years.
Dick Mayer
What a complete joke brought to you by those who sponsor these studies, yes you guessed it, The Dairy Council. They pay for these studies. Un- fortunately "milk does not make everybody good" Such a large number of the population are lactose intolerant, some people of color even more. Milk causes all sorts of stomach problems. No one needs milk when they have been weened from mom. Have you noticed that the dairy section in your market is shrinking, many nut and plant based milk products are taking the milk's place. Also cheeses, yogurt, etc. I have not had milk in years and I am very healthy and no cows need be confined or abused, breed over and over in my behalf.
"Did they use pure milk from cows not subjected to antibiotics and hormones?"

I read the paper, dated October 28, 2019, to see if they addressed this. It turns out they used all the data available to the public from the National Health and Nutrition Examination Survey that included enough DNA information and dietary information to correlate milk fat content with telomere length. The only data with that information was for the four years 1999-2002, with 3,072 women and 2,762 men having agreed to let you and everyone else in the world scrutinize all their DNA (not everyone is comfortable doing so). The available DNA was studied for telomere length by a UCSF scientist on behalf of this particular study.

Regarding antibiotics, since 2007 it has been illegal to sell milk containing any trace of antibiotics. To quote from, "The legal standard, as defined by the FDA, requires that milk contain no detectable antibiotics when analyzed using approved test methods (Grade A Pasteurized Milk Ordinance, 2007)." Conceivably some of the participants had been exposed to antibiotics earlier than 2007, in particular during 1999-2002, but there is no way a questionnaire of the kind used for this data could have obtained such information. In any event that information has been irrelevant since 2007.

Regarding hormones, all milk contains hormones including growth hormones. What's at stake here is added hormones. In 1993 the FDA allowed US dairy farmers to treat their cows with Monsanto's recombinant bovine somatotropin, rbST, or Sometribove, GH (growth hormone) for short. Many websites claim that organic milk cannot come from cows so treated, but so far I've been unable to find any government standards to that effect; furthermore while it is very likely to be true anyway today for organic milk, (a) that requirement even if in force today was almost certainly not a requirement before 2002 back when regulation of the term "organic" was almost nonexistent, and (b) organic milk was not a "thing" back then, at least not enough to bother including in a questionnaire of the kind available for this study.

Whether added GH in cow's milk (added to their diet, never to the milk itself which would be pointless since you can't make milk "grow" faster) would accelerate aging of humans more or less than naturally occurring growth hormones in milk is an interesting question (though not to my family because we eat organic whenever available and sensible, especially milk).
There are milk enzymes required for fully digesting milk fat that are inactivated within the pasteurization process. Some lactose intolerant are suddenly not so with a switch to raw milk. I drink nearly 1/2 gallon per day of whole raw milk (2-3 raw eggs from my free range chickens, too.) and my annual blood work is great at nearly 65 yrs old (BP 112/62, RH under 60) and also take no meds. Most kids 1/2 my age have trouble keeping pace with me in gym.