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Why Microdosing Retatrutide Is A Total Failure

eazy_

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CLIFFS

1. Reta is not a drug. It's a signal.

2. How reta works

Goes straight to your hypothalamus (your brain's central command center).

It specifically targets something called Pro-opiomelanocortin (POMC). When these neurons get activated, they release Alpha-melanocyte-stimulating hormone (a-MSH), a neuropeptide that binds to Melanocortin 4 (MC4R), a G-protein-coupled receptor in your brain that plays a crucial role in regulating energy balance and appetite.

This is the biochemical equivalent of slamming down the off switch on your appetite.

It suppresses Neuropeptide Y (NPY), which is the most powerful hunger-signaling molecule that your body produces.
full. Reprogramming your brain's definition of hunger.

It binds to GLP-1 and GIP, you know these receptors on the beta cells, which trigger G-protein coupled receptor cascades that skyrocket intracellular cyclic AMP (cAMP), this amps up glucose-dependent insulin secretion.

These processes only occur when glucose is high; no more wild spikes.

While simultaneously telling the alpha cells to stand down, shutting down all unnecessary glucagon output.

The best part is, this happens in your liver. Reta binds to glucagon receptors on hepatocytes (cells) in your liver. Cyclic AMP (cAMP) activates Protein kinase A (PKA) which phosphorylates (a biochemical process where a phosphate group is added to a molecule, such as a protein or sugar) and activates hormone sensitive lipase HSL (a key intracellular enzyme that breaks down stored lipids, such as triglycerides and cholesterol esters, into free fatty acids and cholesterol, primarily in adipose tissue).

HSL is the enzyme that unlocks your fat cells, hydrolyzing stored triglycerides into free fatty acids, which you're going to burn, and then it floods your bloodstream with all this fuel ready for oxidation to be used. Turning your body into a fat-burning machine.

3. microdosing myths

This triple agonism creates a self-reinforcing, very powerful feedback loop drastically reducing caloric intake, highly sensitizing insulin response, and maxing out basal energy expenditure.

Reta's terminal half-life is approximately 144 hours about 6 days.

The Importance of Steady State Concentration

Requires a steady state concentration. (therapeutic equilibrium where the concentration in the bloodstream stays within a consistent range over time, rather than continuously building up or falling off)

The time to reach steady state is determined by half half-life. It takes four to five half-lives to reach 94 to 97%.

** 6 day half life = 24-30 days **

The weekly dosing interval is not arbitrary because the 7-day injection perfectly reinforces the plasma concentration just as it begins to decline from the previous dose. So it maintains that very crucial, very stable therapeutic plateau.

If you microdose, you can never go through the 4 to 5 half-lives to reach the 94 to 97% of steady state concentration, which means you'll never get to the 24 to 30 day mark, which, for reta is required.


The fallacy of: "tiny doses every day because you get fewer side effects and you get the same benefits."

For example, 0.1 milligrams daily versus 2.5 milligrams weekly means that the amount administered is likely less than the daily clearance rate, which we already learned is required.

You perpetually operate in what's called the distribution phase. You're trying to fill a bathtub with a thimble while the drain is wide open.

You never get to the therapeutic steady state that's required for efficacy. Rewiring of the hypothalamic set point requires a very strong, sustained signal.

A weekly dose provides days-long signals that carve new fullness pathways into your brain's neural architecture. A microdose is a weak, fleeting signal.

 
I actually like his take on Reta—it’s not just a fat-loss thing. He’s not really pushing it hard at all, just using it more as a longevity supplement. Like I said in another post, Reta totally rewired the way I think about food and how I eat. I didn’t go crazy on the doses—going back in at 2 mg, maybe even dropping to 1.5 mg a week.
 
CLIFFS

1. Reta is not a drug. It's a signal.

2. How reta works

Goes straight to your hypothalamus (your brain's central command center).

It specifically targets something called Pro-opiomelanocortin (POMC). When these neurons get activated, they release Alpha-melanocyte-stimulating hormone (a-MSH), a neuropeptide that binds to Melanocortin 4 (MC4R), a G-protein-coupled receptor in your brain that plays a crucial role in regulating energy balance and appetite.

This is the biochemical equivalent of slamming down the off switch on your appetite.

It suppresses Neuropeptide Y (NPY), which is the most powerful hunger-signaling molecule that your body produces.
full. Reprogramming your brain's definition of hunger.

It binds to GLP-1 and GIP, you know these receptors on the beta cells, which trigger G-protein coupled receptor cascades that skyrocket intracellular cyclic AMP (cAMP), this amps up glucose-dependent insulin secretion.

These processes only occur when glucose is high; no more wild spikes.

While simultaneously telling the alpha cells to stand down, shutting down all unnecessary glucagon output.

The best part is, this happens in your liver. Reta binds to glucagon receptors on hepatocytes (cells) in your liver. Cyclic AMP (cAMP) activates Protein kinase A (PKA) which phosphorylates (a biochemical process where a phosphate group is added to a molecule, such as a protein or sugar) and activates hormone sensitive lipase HSL (a key intracellular enzyme that breaks down stored lipids, such as triglycerides and cholesterol esters, into free fatty acids and cholesterol, primarily in adipose tissue).

HSL is the enzyme that unlocks your fat cells, hydrolyzing stored triglycerides into free fatty acids, which you're going to burn, and then it floods your bloodstream with all this fuel ready for oxidation to be used. Turning your body into a fat-burning machine.

3. microdosing myths

This triple agonism creates a self-reinforcing, very powerful feedback loop drastically reducing caloric intake, highly sensitizing insulin response, and maxing out basal energy expenditure.

Reta's terminal half-life is approximately 144 hours about 6 days.

The Importance of Steady State Concentration

Requires a steady state concentration. (therapeutic equilibrium where the concentration in the bloodstream stays within a consistent range over time, rather than continuously building up or falling off)

The time to reach steady state is determined by half half-life. It takes four to five half-lives to reach 94 to 97%.

** 6 day half life = 24-30 days **

The weekly dosing interval is not arbitrary because the 7-day injection perfectly reinforces the plasma concentration just as it begins to decline from the previous dose. So it maintains that very crucial, very stable therapeutic plateau.

If you microdose, you can never go through the 4 to 5 half-lives to reach the 94 to 97% of steady state concentration, which means you'll never get to the 24 to 30 day mark, which, for reta is required.


The fallacy of: "tiny doses every day because you get fewer side effects and you get the same benefits."

For example, 0.1 milligrams daily versus 2.5 milligrams weekly means that the amount administered is likely less than the daily clearance rate, which we already learned is required.

You perpetually operate in what's called the distribution phase. You're trying to fill a bathtub with a thimble while the drain is wide open.

You never get to the therapeutic steady state that's required for efficacy. Rewiring of the hypothalamic set point requires a very strong, sustained signal.

A weekly dose provides days-long signals that carve new fullness pathways into your brain's neural architecture. A microdose is a weak, fleeting signal.

ok, once a week DOSE RECOMMENDATIONS???
 
Retatrutide was given as a once-weekly subcutaneous injection in all the trials. Lilly Investor Relations+3PMC+3PMC+3

Doses studied ranged from 1 mg up to 12 mg once weekly in various escalation regimens. ADA Meeting News+3Lilly Investor Relations+3PMC+3

In one key trial published in The New England Journal of Medicine, participants were randomized to receive retatrutide at:

1 mg weekly
4 mg weekly (with starting “ramp up” from 2 mg or 4 mg)
8 mg weekly (with starting “ramp up” from 2 mg or 4 mg)
12 mg weekly (starting from 2 mg) New England Journal of Medicine+3New England Journal of Medicine+3PMC+3

The ramp-up (titration) schemes were used to reduce side effects and allow tolerability. PMC+2New England Journal of Medicine+2

In terms of outcomes, all participants treated with 8 mg or 12 mg met or exceeded 5% weight loss as of the timepoints reported. New England Journal of Medicine+2ADA Meeting News+2

The weight loss effects were dose-dependent: higher doses gave more average weight loss (e.g. ~24.2% at 48 weeks in the 12 mg group) New England Journal of Medicine+3Lilly Investor Relations+3PMC+3

There is no approved “recommended” clinical dose of retatrutide — Phase-3 trials (the TRIUMPH program) are testing once-weekly subcutaneous regimens using a titration (ramp-up) approach. In Phase-3 the arms are typically described as “dose 1” and “dose 2” (with an initial lead-in on dose-1), rather than publicly listing exact mg values in every public summary. The Phase-2 work that informed those choices studied 1 → 12 mg once weekly with titration. Lilly Medical+2Lilly Trials+2

Not approved / investigational only. Any dosing shown in trials is investigational and not an approved clinical recommendation. Lilly Medical

Administration schedule. Trials use once-weekly subcutaneous injections with stepwise titration to the target dose to improve GI tolerability. This mirrors the Phase-2 approach. New England Journal of Medicine+1

Phase-2 dosing that guided Phase-3: Published Phase-2 (NEJM) tested multiple fixed target doses (1 mg, 4 mg, 8 mg, 12 mg once weekly) with initial ramp-up for higher arms — higher doses produced larger, dose-dependent weight loss. Those Phase-2 regimens are the basis for dose selection in Phase-3. New England Journal of Medicine

Phase-3 TRIUMPH program structure: Lilly’s TRIUMPH Phase-3 studies are described publicly as using a lead-in phase (participants on “dose 1”), followed by randomized comparisons between “dose 1,” “dose 2,” and placebo in different sub-trials (chronic weight management, outcomes, OSA, osteoarthritis, etc.). Public trial pages and registries refer to the arms as dose-1 / dose-2 rather than publishing the manufacturer’s exact mg values in the summary. Lilly Trials+1

 
Thanks for posting @eazy_, its an informative take on Reta. Starting to wonder if Trevor has tourette's but still very informative.
 

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