![The cover of the 2021 World Anti-Doping Agency Code.](https://www.usada.org/wp-content/uploads/2021-wada-code.jpg)
Athlete Advisory: Key Changes to the World Anti-Doping Code
While there are many changes reflected in the 2021 WADA Code, here are some of the key changes that athletes should be aware of below.
![A glass of orange juice next to half an orange.](https://www.usada.org/wp-content/uploads/orange-juice.jpg)
Chuck Aoki: Top 5 Foods for Getting the Vitamin D You Need
To get the vitamins that Paralympian Chuck Aoki needs to perform his best, including vitamin D, he relies on foods that have lots of nutrients.
![A table top with a bag of heroin, a clear bag of cocaine, a small bag of marijuana, and small, circular white pills.](https://www.usada.org/wp-content/uploads/substances-of-abuse.jpg)
Substances of Abuse 101
New to the 2021 WADA Prohibited List is Substances of Abuse, which are substances prohibited in-competition and frequently abused in society.
![Cover image of the 2021 WADA Prohibited List.](https://www.usada.org/wp-content/uploads/2021-WADA-Prohibited-List-post.jpg)
Athlete Advisory: Explanation of Key Changes on the 2021 World Anti-Doping Agency Prohibited List
For the 2021 Prohibited List, WADA made several changes that could impact athletes’ use of substances and treatments.
![Bowl of brown rice pudding with cinnamon.](https://www.usada.org/wp-content/uploads/brown-rice-pudding.jpg)
5 Sweet Treats that Keep Olympian Laurie Hernandez Fueled and Feeling Good
Olympic gymnast Laurie Hernandez shares the five sweet treats she incorporates into her food first approach to nutrition.
![Young asian female athlete with mother talking to a doping control officer at a table.](https://www.usada.org/wp-content/uploads/athlete-responsibilities-1.jpg)
Athlete Responsibilities and Failures to Comply with Sample Collection
What athletes need to know about their responsibilities during sample collection and what may be considered a failure to comply.