Dwayne "The Rock" Johnson has revealed the recipe for his post workout smoothie, a substantial blend built around protein powder, creatine, carbohydrates and whole foods. While the drink may fit his demanding nutritional goals, a registered dietitian cautioned that the same portions might not suit everyone.

The actor and former professional wrestler shared the smoothie in an Oct. 5 Instagram post. His recipe includes 70 grams of protein powder, a quantity that immediately places protein at the center of the post workout drink.

Exactly how much protein that serving provides remains unclear. The powder is a prototype that Johnson is testing as part of research for a supplement line he hopes to release in the coming years.

Lauren Manaker, a registered dietitian based in Charleston, South Carolina, told Fox News Digital that it is still reasonable to assume the powder has a high protein content. That does not necessarily mean other people should copy the serving without considering their own needs.

Johnson’s smoothie also includes 10 to 15 grams of creatine. Manaker said that amount is reasonable for someone with Johnson’s stature and weight, which he listed as 236 pounds in his Instagram post.

For someone who weighs less or has a different fitness level, however, that creatine dose might be somewhat high, Manaker noted. The difference highlights why a recipe designed for Johnson’s body and routine may not translate directly to another person.

Creatine is a compound derived from amino acids, the building blocks of protein. The body produces creatine naturally, and most of it is stored in the muscles.

Physically active people may also use creatine supplements to support muscle growth or recovery following exercise, according to the Mayo Clinic. Johnson’s smoothie combines that ingredient with its large serving of protein powder.

Another component is far less typical for a smoothie: jasmine rice. Manaker said the rice is most likely included to supply the carbohydrate portion of the drink’s macronutrient composition, often referred to as its macros.

Johnson said in the Instagram caption that he aims to consume about 4,000 calories per day. That unusually substantial daily target provides important context for the smoothie’s calorie count, protein powder and other ingredients.

"If I'm not sharp with my macros, at 6'4, I can easily start to look stringy," Johnson said. "I'll eat a real food meal 2–3 hours later, pending my work schedule."

The smoothie therefore serves as one part of Johnson’s broader daily eating plan rather than a replacement for all other food. His caption indicates that another meal made from real food usually follows several hours later, depending on his work schedule.

Despite the sizable portions, Manaker found the smoothie balanced for Johnson’s stated goals. "I think this smoothie is quite balanced, and it does provide a wide array of nutrients, especially because he is including whole foods like blueberries," she said.

Manaker also said the smoothie provides hydration, which helps support recovery after a workout. The inclusion of blueberries adds a whole food element alongside the protein powder, creatine and jasmine rice.

The drink’s protein content and calorie count are high, Manaker acknowledged. Given Johnson’s goal of consuming roughly 4,000 calories each day, however, she described it as "a great addition to his diet."

Her assessment came with an important distinction between Johnson’s circumstances and those of other people. His weight, stature, fitness level and calorie goal all shape whether the recipe’s portions are appropriate.

The smoothie may be balanced within Johnson’s eating plan, but the creatine amount could be excessive for someone smaller or at another fitness level. The precise protein content also cannot be determined from the 70 gram serving because the powder remains a prototype.