Do hormones in milk, meat and eggs cause early puberty?
We have so many choices in our grocery store's dairy case - whole milk, heavy whipping cream, 2% cheese, fat-free skim yogurt. But are there more steroid hormones in the full-fat versions of dairy products? If so, are high-fat dairy products, like whole milk and whipping cream, more likely to have more steroids than those dairy products with less fat, like fat free/skim milk?
If you have questions about dairy, Best Food Facts experts can help. They’ve tackled some of the most common dairy myths to help separate fact from fiction.
The Best Food Facts post about hormones is one of the most visited pages on our site. It seems many readers want more information on the topic. Our experts have answered Are hormones in my milk and meat making my kids bigger? and What could be causing early puberty in girls?
Recently, Best Food Facts received a question from Maddee asking, "What is the hormone level (estrogen) in beef compared to that of other animal protein products? With that, how does an animal that has been implanted with synthetic hormones (estrogen) excrete those hormones?”
To answer Maddee's question, Best Food Facts contacted Dr. Ann Macrina from Penn State.
With all the buzz over questions about whether antibiotics fed to animals raised for food cause human antibiotic resistance, it seems apparent that this issue is at the forefront of consumer concerns. As well, we received the questions, “Why are antibiotics fed to livestock inside CAFOs or feedlots? Is this dangerous to humans?” from http://www.fooddialogues.com/. To address the topic, and as a follow up to our previous posts on the subject, we asked experts Dr. Peter Davies and Dr. H. Scott Hurd to respond.
As the year winds down, we'd like to thank all of our readers for taking time to learn more about our food system. We appreciate your comments and questions! We'd also like to thank our food system experts for providing their thoughts and expertise throughout the year.
In the post, Hormones in Milk: Are They Causing Early Puberty in Girls, we wondered, what is causing early maturity in girls? Based on what Dr. Ann Macrina indicated, it could be any of several factors.
One of our readers, Dan, asked for clarification from Dr. Macrina: "Dr. Macrina indicated it could be any of several factors – better nourishment, higher body weight and some even suggest exposure to chemicals. Does Dr. Macrina mean chemicals like pesticides and herbicides?"
Food has gotten more and more expensive over the last several years and protein sources seem to be some of the fastest increasing items. Even one of the most affordable protein sources – eggs – has seen an increase in price. Along with the general increases across the board, there’s plenty of chatter regarding the price differences for eggs produced in different types of housing systems.
Expert information about the Dirty Dozen list from the Environmental Working Group that lists pesticide residues in fruits and veggies.
Experts discuss the differences between grass fed and grain fed beef.
Experts discuss the question of the association between hormones in dairy products and early puberty in girls.
The amount of antibiotics given to animals raised for food is a concern to many. Are they being over-used? Is this overuse creating antibiotic resistant superbugs in our families?
Dr. Ruth MacDonald addresses whether those with gluten intolerance, or Celiac disease, can eat meat from grain-fed animals without having an allergic reaction.