Hormonal
Consuming 20–40g of whey protein immediately after resistance exercise significantly increases myofibrillar fractional synthetic rate (FSR) and activates the AKT/mTOR signaling pathway (AKT, mTOR, 4E-BP1, p70S6K, rpS6) in healthy adults, thereby extending the post-exercise anabolic window.
For healthy adults engaging in resistance training, consuming 20-40g of whey protein around your workout (either immediately after or up to 45 minutes before) significantly boosts muscle protein synthesis compared to placebo. This strategy activates the AKT/mTOR pathway, which drives muscle repair and growth. You do not need to consume excessive amounts (>40g) to see benefits, and pre-workout consumption may even offer a slight edge in FSR magnitude for some protocols.
The combination of whey protein supplementation and exercise improves MPS in a time- and dose-dependent manner. Consumption of 20–40g of whey protein before multiple sets of resistance exercise may enhance myofibrillar FSR and activate the AKT/mTOR pathway, thereby augmenting MPS and extending the anabolic window.
Why this rating
Based on a systematic review and meta-analysis of 21 RCTs, though heterogeneity was high (I2 > 70% for most outcomes).
Source
Whey Protein Supplementation Combined with Exercise on Muscle Protein Synthesis and the AKT/mTOR Pathway in Healthy Adults: A Systematic Review and Meta-Analysis
Xiaorong Ji et al. · Nutrients · 2025
DOI 10.3390/nu17162579
Related findings · Hormonal
- Initial treatment for type 2 diabetes should be a combination of metformin and either an SGLT-2 inhibitor or a GLP-1 receptor agonist to achieve cardiorenal protection, rather than monotherapy or older agents like sulfonylureas.Strong
- For patients with specific monogenic obesity syndromes (leptin deficiency, POMC/PCSK1/LEPR mutations), targeted pharmacotherapy (recombinant leptin or setmelanotide) is highly effective and should be prioritized, unlike in polygenic obesity.Strong
- Continued weekly administration of 2.4 mg subcutaneous semaglutide prevents weight regain and promotes further weight loss in adults with overweight or obesity, whereas switching to placebo results in significant weight regain.Strong
This is one finding among thousands. Every one is graded and traced to its source, so you can see what the evidence actually supports. Browse the research →