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DarrenW29
08-13-2025, 05:23 PM
What Cialis does

Cialis is primarily a PDE5 inhibitor, meaning it prevents the breakdown of cyclic GMP in smooth muscle.

This causes vasodilation"widening blood vessels"which is why it’s used for erectile dysfunction and sometimes pulmonary hypertension.

Cialis and fat loss: the theory

Some research suggests PDE5 inhibitors can influence adipose tissue metabolism:

• Increased cGMP in fat cells may promote browning of white fat, which can slightly increase energy expenditure.

• Improved blood flow could theoretically enhance nutrient delivery to muscles and clearance of metabolites.

• There’s very limited human data, but some animal studies show PDE5 inhibitors may reduce fat accumulation in specific contexts.

Practical effect
• Any fat loss effect from Cialis alone is likely very modest. It is not a primary fat loss drug.

• The effect is much smaller than diet, exercise, or other pharmacologic interventions like T3

clenbuterol, or SGLT2 inhibitors.

• People using it for fat loss typically do so as an adjunct, not a main driver.

Timing / use
• Fat loss protocols sometimes microdose PDE5 inhibitors daily rather than the standard ED dosing to maintain mild PDE5 inhibition.

• You’d want to monitor blood pressure because vasodilation can lower it.

Bottom line: Cialis can theoretically aid fat loss via mild browning of fat and improved circulation, but the effect is subtle and far from a primary fat-burning agent.

It’s mostly useful if you’re already doing aggressive diet, cardio, and pharmacologic fat-loss strategies.

Blood flow / vasodilation
• Cialis inhibits PDE5 ' raises cGMP in smooth muscle ' relaxes blood vessels.

• More blood flow to skeletal muscle during training or at rest ' more oxygen, nutrients, and glycogen delivered to the muscle.

• This fills the muscle cells more, creating that “full” pumped appearance, especially in well-trained muscles like glutes and biceps.



Interaction with glycogen
• PDE5 inhibition enhances capillary perfusion, so even in a caloric deficit, muscles can retain glycogen and water better.

Full glycogen stores = fuller, harder-looking muscles.

• Combined with insulin, IGF-1, or carb spikes, the effect is amplified because blood is delivering nutrients efficiently.



Nitric oxide / downstream effects

• cGMP is downstream of nitric oxide (NO).
• Cialis prolongs cGMP signaling, similar to how nitric oxide boosters work ' sustains vascular tone and muscle pump.


Why it matters in ultra-lean phases
• When body fat is very low (4-5%), muscles can look flat because glycogen and water are low.

• Microdosed Cialis helps keep muscles visually full without needing to increase carbs dramatically.

• Works synergistically with pre-workout carb/glycerol/taurine protocols to maximize striation visibility while maintaining fullness.

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NYCgains
08-24-2025, 01:46 AM
The Cialis-enhanced blood flow and nitric oxide data for satellite cell activation is genuinely interesting science. 5mg daily low-dose is the sweet spot. Meaningful vasodilation without the headaches from higher doses. The fat mobilisation effect is secondary to muscle nutrient partitioning in my view.

FLbodybuilder
08-29-2025, 08:40 PM
I have used 5mg Cialis daily for three years now, primarily for cardiovascular health. The body composition effect is real but subtle. Better muscle fullness, improved training endurance, slight fat reduction. The mechanism is eNOS upregulation leading to better nutrient partitioning.

GODZILLA
09-04-2025, 03:33 PM
Cialis at 5mg daily has a decent evidence base for cardiovascular health as well as the other benefits. The PDE5 inhibition effect on blood pressure is mild but real. Worth it for most enhanced athletes on protocol. If you have any blood pressure issues already check with a doctor before adding it.

Dutchman
09-04-2025, 03:33 PM
PDE5 inhibitor effect on body composition: the primary mechanism is eNOS upregulation leading to increased nitric oxide in endothelium and skeletal muscle microvasculature. Downstream effects include improved insulin sensitivity, enhanced satellite cell activation via improved nutrient delivery, and partial BAT thermogenesis upregulation. 5mg daily is the clinically validated dose.

emperorcaliano
09-11-2025, 01:32 PM
I personally love to introduce tadalafil on the day I train shoulders or Hamstrings (my two main weak points).
I never go above 5mg, as I get some time of muscle soreness the day after (similar type of soreness post Clenbuterol cramps).
But I easy fix it by taking taurine post workout and pre-bed.