The
Daily
Fix
Rest
Ribeye with Shallot Butter
Insulin and Muscle Protein Metabolism
Rest day
Seared ribeye strips topped with rich shallot-infused butter, served over garlicky sautéed spinach.
A meta-analysis finds insulin primarily reduces muscle breakdown, while amino acids drive muscle growth
Enjoy the recovery time, or make-up anything you missed from last week.
Ingredients
For the Ribeye:
1 lb ribeye steak, cut into thick strips
Salt & black pepper, to taste
1 Tbsp butter or ghee (for searing)
For the Shallot Butter:
2 Tbsp butter, softened
1 small shallot, finely minced
½ tsp fresh thyme or parsley, chopped
Pinch of salt
For the Garlic Spinach:
4 cups baby spinach
1 Tbsp butter
1 garlic clove, minced
Salt, to taste
Optional: 1 tsp olive oil (for finishing)
Macronutrients
(per serving, makes 2)
Protein: 45g
Fat: 55g
Carbs: 3g
Preparation
In a small pan over low heat, gently sauté minced shallot in 1 tsp butter until soft (about 2–3 mins). Let cool slightly, then mix into softened butter with herbs and a pinch of salt. Set aside.
In a skillet over medium heat, melt 1 Tbsp butter. Add garlic and sauté 30 seconds. Add spinach and cook until wilted (2–3 minutes). Season with salt. Remove from heat and set aside.
Season ribeye strips with salt and pepper. Heat 1 Tbsp butter or ghee in a skillet over medium-high. Sear steak 2–3 minutes per side until browned and cooked to your preferred doneness.
Plate the garlic spinach, top with seared ribeye strips, and finish with a dollop of shallot butter. Optional: drizzle with olive oil off heat.
This 2016 systematic review and meta-analysis examined 25 human studies on insulin’s role in skeletal muscle metabolism. The researchers found that insulin alone did not significantly increase muscle protein synthesis in most conditions. Instead, insulin’s clearest and most consistent effect was reducing muscle protein breakdown, helping preserve lean tissue and improving overall protein balance.
Importantly, muscle protein synthesis only increased when amino acid delivery to muscle also increased. In other words, elevated insulin signaling by itself may help suppress muscle loss, but actual muscle building still depends on consuming enough protein to provide the amino acids needed to synthesize new tissue.
The paper also found that older adults and people with diabetes or insulin resistance showed impaired responses to insulin signaling in muscle. Overall, the findings support a more nuanced understanding of insulin metabolism: insulin helps regulate nutrient storage and tissue maintenance, while amino acid availability remains the key driver of muscle growth.
TUESDAY 260526