ForumResults & Progress

Just curious about results with Reta after being on TIRZ for a year

12 replies6 peopleJul 25, 2026☆ Follow
Summary

Is it common to need higher reta doses after a year on tirz, and how fast should someone titrate while stacking other compounds?

The original poster lost 25 kg on low-dose tirz then switched to reta, reaching only 4 mg after seven months with slower-than-expected further loss. Several replies note that prior GLP-1 exposure usually requires higher reta doses for effect, that clinical data show best results at 8-12 mg, and that the current titration is unusually slow. Opinions differ on adding tesa early versus waiting until near goal weight and on whether 2 kg per month is acceptable progress.

What this discussion establishesWhere people disagree

Whether tesa should be added while still 20 kg from goal or saved until the end, and how quickly to increase reta dose without causing side effects

Still open

Whether the poster will ultimately need 12 mg of reta or can reach goal on 8 mg or less

Nothing here is advice.

12 replies · 6 people
PlainKettle14archiveopening postJul 25

I'm wondering if it's typical to see reduced response to reta after a full year on tirz. I got solid results from low tirz doses and moved over to reta, but even with gradual increases the fat loss isn't matching what I expected. I'm at 4 mg after seven months, keep up with exercise and protein, and still see others reporting stronger results at lower amounts. I recently added mots-c and tesa hoping to target visceral fat. Any thoughts or suggestions?

BrightSparrow36archiveJul 25

Yes. Once you've used any GLP-1, reaching noticeable effects from a different one or restarting the same one usually requires higher doses.

KeenPebble33archiveJul 25
↳ replying to @PlainKettle14 (opening post)

It depends on your starting weight and how much you still want to lose. Trials show over 20 percent loss only happens at 8-12 mg, not lower. Tesa helps with visceral fat but isn't as strong for total weight reduction, so stay on reta for that. Seven months to reach 4 mg is very slow. Increase faster and results should appear.

PlainKettle14archiveJul 25
↳ replying to @KeenPebble33

Thanks. I began at 135 kg on tirz, reached 110 kg, then switched to reta and have lost another 15 kg over seven months. I'll try stepping up every two weeks by 0.5 or 1 mg. Planning to keep tesa for three more months while aiming for another 20 kg by December.

PatientFenwick91archiveJul 25

What dose of tirz were you using? Since low-dose tirz worked well and you had already dropped 25 kg, continuing to titrate tirz might have been an option. Adding tesa now while still 20 kg away seems early; it might be more useful closer to goal. Your current rate of just over 2 kg a month is reasonable, and pushing reta every two weeks to chase 4 kg a month could be too aggressive.

KeenPebble33archiveJul 25
↳ replying to @PlainKettle14

Typical reta steps are 2/4/8/10/12 mg every three weeks or so. Your current pace is slower than that. Losing 20 kg in four months would need faster and higher dosing; 8 mg is often effective. Adding tesa early isn't ideal because it doesn't drive much overall loss and is better saved for stubborn visceral fat once the main weight is gone.

PlainKettle14archiveJul 25
↳ replying to @PatientFenwick91

I was on 5 mg tirz. Food interest dropped so much it felt like a chore and progress stalled, so I took two months off before trying reta.

PlainKettle14archiveJul 25
↳ replying to @KeenPebble33

I'll try increasing by 2 mg each month and watch how I tolerate it. Some people do well on low doses, but maybe I'm not one of them. I've also raised weights and protein, so we'll see how it goes.

PlainKettle14archiveJul 26
↳ replying to @BrightSparrow36

Thanks. I'll keep raising the weekly dose and see where it lands. I probably haven't reached the right level yet. Even 5 mg tirz felt strong, but that hasn't happened with reta so far.

CopperSignal27archiveJul 26

Aiming for 45 kg total from 135 kg is about 33 percent, above typical trial peaks, yet your results on modest doses suggest you may respond more than average. Long-term you will probably need the higher end, possibly 12 mg, if side effects permit. No need to rush the increases, but higher amounts are likely required eventually.

QuietFenwick11archiveJul 26
↳ replying to @PlainKettle14 (opening post)

Getting better fat loss at lower doses isn't a competition with anyone else. Use the dose that works for you and increase it. Drop the tesamorelin; the water weight will make the scale move in the wrong direction and you won't enjoy that.

PlainKettle14archiveJul 26
↳ replying to @CopperSignal27

As a physician I was urged by the rep to increase tirz but stopped at 5 mg because of side effects. After a two-month break I tried reta instead. Many of my diabetic patients lose steadily on tirz over two or three years. Reta has been slower for me and I may not have found the right dose yet. Time isn't pressing and my labs look good, so I'll continue raising it gradually to avoid loose skin.

PlainKettle14archiveJul 26
↳ replying to @QuietFenwick11

It's not about comparing with others; everyone has their own metabolic profile. With reta I likely need more than 4 mg. I've been on tesa for two weeks and will check measurements at one month to decide whether to continue eight weeks or stop. The process goes on.

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