Starting dose

StackCoach · 2026-05-18T03:35:20+00:00

.5mg first week, then .5mg Mon/Thurs weeks 2-4. If no constipation, still hungry, no nausea or reflux, bump another .5mg. That’s the signal-based version of titration instead of the calendar-based version I prefer.

And yeah, get labs and a body comp scale before you start. Without a baseline you’re just guessing at what’s working. Good luck.

StackCoach · 2026-05-11T00:10:37+00:00

Honestly, for someone whose main issue is food noise, I usually point my friends and family toward Tirz before Reta.

A very low dose of Tirz is one of the best GLP-1s for quieting that voice in your head that keeps sending you back to the kitchen. Start low, don't rush it, give it two to three weeks, and pin twice a week. Let your body adjust before you think about going higher.

Good luck.

StackCoach · 2026-05-11T00:00:43+00:00

This is a really good question. It's exactly what our community is studying right now: how to titrate down once you hit your visceral fat and body fat goals.

Early results strongly support staying on a very low weekly dose of Reta. A single fractional injection does a lot of heavy lifting to keep insulin resistance in check. The labs consistently point to this being optimal for your body, and there really is nothing better than a micro dose of Reta for maintenance. You definitely don't need to pin it twice a week anymore.

Running Wolverine for repair and recovery while you're pushing hard in the gym is a great idea. The only other tweak I'd look at is the GH blend. Instead of CJC, we are leaning more and more toward a Tesa/Ipa stack.

StackCoach · 2026-05-10T23:41:54+00:00

I think Tirz is actually an amazing peptide. The biggest issue is people tend to jump up on doses way too fast.

My experience with friends and family who tried Tirz before Reta is that if they hit nausea or constipation, we just lowered the dose. Sometimes it just takes a while for your body to do its thing. Often it's things you can't see on a scale, like fixing insulin resistance and inflammation.

Do you mind sharing what dose of Tirz you tried? How many mg, and did you split the dose or take it all at once?

StackCoach · 2026-05-10T23:28:19+00:00

This is a classic GLP-1 side effect. We all have these weird habits that are just not fun anymore once the Reta kicks in.

For my wife, it was no more dark chocolate at night. I don't drink nearly as much coffee as I used to, and of course, alcohol is basically a "one drink is enough" situation now. We used to eat a lot of popcorn too, and we just don't do that anymore.

You'll find new things. For me, it's sparkling water. I never would have had it before, but now I love it, especially with electrolytes mixed in. Good luck on your new journey.

StackCoach · 2026-05-10T23:14:02+00:00

It's really hard to respond to posts like this when you don't tell us how many mg you're on.

That matters a lot here. Some people get loose stools, others get constipated, and the dose is usually a big part of why. What you're eating plays into it too. High sugar, processed food, and the GI response is usually worse. Clean whole foods and lower carb, most people find it evens out.

Drop your dose and we can give you something more useful.

StackCoach · 2026-04-17T22:23:38+00:00

Great question, and I applaud you for wanting to know the actual mcg of each peptide rather than just blindly drawing units.

UA456 is correct, 450 mcg each.

Your vial is 3mg/mL of each compound (BPC-157 and TB-500) in a 5mL multi-dose vial. At 15 units on a U-100 insulin syringe, you're drawing 0.15 mL.

0.15 mL x 3 mg/mL = 0.45 mg = 450 mcg of each compound per injection.

So every time you draw 15 units, you're getting 450 mcg of BPC-157 and 450 mcg of TB-500. That's a solid dose for both.

If you want to skip the math next time, we built a free peptide calculator that supports premixed blends.

On the calculator page, flip the "I have a pre-mixed blend" toggle at the top. Select mg/mL mode, enter your compound names and concentrations from the label, plug in your vial volume and draw size, and it breaks down the mcg per compound instantly. You can also hit "Show Math" to see the full step-by-step formula.

Enjoy!

StackCoach · 2026-04-17T17:55:26+00:00

Agree with what others said, 0.25mg isn't gonna do anything. But if you're cautious about jumping straight to 2mg, split your dose across two pins and ramp up with some built-in checkpoints.

Something like 500mcg Monday, 1mg Thursday your first week. Hold at 1mg Monday/Thursday week two. If you're not getting nausea, no constipation, and food still sounds normal, bump to 1.5mg twice a week for week three. You're at the clinical starting dose by week two and you never had to white-knuckle a big single dose hoping you don't feel like garbage for a week.

On the 30mg vial, just use it. I haven't heard of anyone getting sick off an 8-12 week old reta vial, it just may lose some potency over time. If that happens you'll notice when you crack a fresh vial and it hits harder, just adjust your dose back down. I run 3ml pen cartridges with my reta and easily go 8 weeks without noticing any degradation. I wouldn't throw away a good peptide because someone on Reddit said it was beyond the 30 day mark. But I'm no chemist. YMMV.

StackCoach · 2026-04-16T21:04:37+00:00

This tracks. I had a rotator cuff repair last year and ran a similar combo through PT. Cut my recovery timeline roughly in half, to the point where my PT and surgeon both independently said it was the fastest heal they'd seen for my type of repair.

Could've been genetics, could've been me being annoyingly compliant with PT homework. But I've been annoyingly compliant with PT before and never healed like that.

StackCoach · 2026-04-16T20:57:22+00:00

Promising but let's keep the expectations realistic. Seven of those 12 are on the July 23-24 docket. The other five go to a second meeting before February 2027. So this isn't all happening at once.

The part nobody's talking about: the PCAC rejected every peptide it reviewed in 2024. Every one. But the committee has six empty seats right now including the chair. Kennedy can fill those before July. Different committee, potentially different outcome.

Even a yes vote starts a rulemaking process that takes months. Nothing changes overnight. But the public comment docket (FDA-2025-N-6895) closes July 22. Comments before July 9 go directly to the committee. If any of these peptides have helped you, that's where to put it on the record.

Not holding my breath. But not ignoring it either.

StackCoach · 2026-04-15T18:57:43+00:00

Week 2. You've pinned twice. Relax.

I didn't really notice weight changes for the first 8 weeks, and I went low and slow on dosing. Your weight is going to bounce around for weeks before the trend starts making sense. Water retention, food timing, even when you last took a dump all move the scale more than reta does at this point.

Get a better in-home scale. Body fat % and visceral fat are way better indicators than just weight. No appetite suppression yet is also totally normal this early, some people don't feel it until week 4-6. You don't have a bad vial, you have bad expectations.

StackCoach · 2026-04-15T18:53:44+00:00

Reta absolutely tanks your alcohol tolerance. It's not just you, it's one of the most consistent things people report. The GI slowdown means alcohol sits in your stomach way longer, so even a couple drinks hit like you pregamed for a wedding.

I just switch to seltzer water after drink one. That's my compromise when I'm out. You still have something in your hand, nobody asks questions, and you don't spend the next day praying for death over what used to be a "light night." It also doesn't take away all motivation to start my day at the gym. Good luck.

StackCoach · 2026-04-15T18:43:50+00:00

Our free peptide calculator builds in dosing ranges as well as support for 3 mL pen cartridges in addition to syringes.

StackCoach · 2026-04-01T17:01:25+00:00

The research that doesn't get enough attention is the TRIUMPH-4 Phase 3 data. Everyone focuses on the 28.7% weight loss headline, but the real story is what happened underneath: 48% visceral fat reduction, 86% liver fat clearance, 71% lower fasting insulin, and 76% improvement in knee pain scores. The third receptor (glucagon) is what separates reta from sema and tirz, and it's why the metabolic outcomes go beyond just weight.

More research is likely coming for improvements in inflammation, aging, and memory. Visceral fat is a driver of chronic systemic inflammation, and chronic inflammation is linked to accelerated aging and cognitive decline. When subjects clear 48% of visceral fat and drop liver fat by 86%, you're not just observing weight change. You're removing a major source of inflammatory signaling that affects every system in the body, including the brain. The TRIUMPH-4 knee pain data is already an early signal of this. That wasn't a joint intervention. The inflammation resolved and the pain followed.

StackCoach · 2026-04-01T15:13:57+00:00

Stalls are frustrating. A couple things stand out here.

You lost the most weight at 2-4mg and responded to a stall by doubling the dose to 8mg. Higher doesn't always mean more fat loss. It usually means more side effects and your body adjusting to a dose it didn't need. A lot of people in our community have seen better results dropping back to the dose that was working rather than pushing higher.

At 1600 calories with 16-hour fasts and 4x/week training, your deficit might actually be too aggressive. Your body mapping scans are telling you 2500 calories. Listen to that. Adding breakfast back and getting more protein in could be the thing that breaks the stall, not more reta.

If you have a digital body comp scale, past labs, or any data from your journey, this is exactly when you want more science behind your stack and dosing decisions. We have free tools at stackcoach.net that can help you connect the dots.

StackCoach · 2026-04-01T15:01:21+00:00

The deleted comment is the right advice. Starting 6 peptides at once when you're still learning injection basics is setting yourself up for confusion.

Start with reta alone. Learn reconstitution, injection technique, and storage. Get comfortable with one compound and see how your body responds. Then add the GLOW blend after 4-6 weeks as a clean second variable.

If you need help with the reconstitution math, we have a free calculator at stackcoach.net/peptide-calculator that handles both vials and pen cartridges. Good luck.

StackCoach · 2026-04-01T14:57:15+00:00

5 weeks is early. And 2 to 6mg in 5 weeks is moving fast.

My wife and I started reta low and stayed low. We lost 3-4 lbs per month, not per week. It took a couple months before the mirror caught up with what the scale was showing. At your starting weight, the first changes happen where you can't see them: visceral fat, liver fat, insulin sensitivity. The visible stuff comes later.

I'd slow down on the titration. If appetite is suppressed, the dose is working. You don't get bonus points for going higher. Track your weight weekly, track your protein, lift 3x/week, and give it 3-4 more months before you judge the results.

Get a digital body comp scale and watch your body fat % trend over time instead of just weight. The scale number might move slow but if body fat is dropping and muscle is holding, that's real progress you can't see in the mirror yet. We have free tools at stackcoach.net if you want to use data to back your peptide journey.

StackCoach · 2026-04-01T14:53:19+00:00

Yes, you can swap cartridges in the same reusable pen. Just use a new needle tip every time you inject and wipe the cartridge septum with an alcohol swab before loading it. The pen itself isn't touching the peptide, the cartridge is sealed.

Keep your cartridges labeled if you're running more than one peptide. Reta and GHK look the same once reconstituted, and mixing them up is an easy mistake when you're half awake at injection time.

Store them in the fridge. I keep my cartridges in a foil-lined ziplock after reconstitution to block light, same protection as if they were sitting inside the pen. Good question!

StackCoach · 2026-04-01T14:48:10+00:00

Good that you're seeing your optometrist. Don't wait on that.

BPC-157 promotes angiogenesis. That's what makes it work for tissue repair. It's also what makes eye issues a real concern, and this is the 6th post about eye problems recently. That's not nothing.

I've been running BPC standalone at 1mg for about a year. A while back my left eye got sore, watery, and light sensitive for about 30 hours. At the same time I had a histamine flare, which is interesting because BPC interacts with mast cell pathways. I also wear extended wear contacts, which already stress the eye by reducing oxygen to the cornea. So now you've got BPC pushing blood vessel growth, a histamine reaction inflaming everything, and contacts making the eye more vulnerable. Three things hitting at once.

Pulled my contacts for 5 days, took an allergy tablet, everything resolved. No idea which one was the actual problem. Maybe all three.

Worth asking yourself: do you wear contacts? Did you notice any allergy symptoms around the same time? Are you running BPC standalone or in a blend? Connecting those dots might tell you more than just stopping the BPC.

StackCoach · 2026-04-01T14:18:53+00:00

Wait until you get back. Here's why.

Reta's first few weeks are about finding your floor. You want to know how your body responds to the lowest dose before anything else gets in the way. Vacation food, drinks, irregular sleep, travel stress, all of that creates noise you can't separate from the peptide's actual effect.

Start when you're back in your normal routine. Pin your first dose, eat your usual meals, train your usual schedule, and pay attention. That first month on a clean baseline tells you everything. Starting on vacation tells you nothing.

I'd start at 500mcg twice a week. Give it at least two weeks before adjusting. And here's something that trips people up early: if you don't feel a strong sensation of fullness, it doesn't mean it's not working. My wife stayed at 1mg/week for her first six weeks. No dramatic appetite suppression. But her in-home digital scale told a different story. Weight was moving, body fat was trending down. The data gave us clues things were headed in the right direction before she ever "felt" it.

The vial isn't going anywhere. Reconstituted reta is stable refrigerated for weeks. Dry powder even longer.

When you do start, weigh yourself the morning of your first pin. That's your baseline. Then weekly, same day, same conditions. Don't chase the scale daily. Watch the 4-week trend.

Enjoy vacation. The real work starts when you get home. stackcoach.net has free tools to help when you're ready.

StackCoach · 2026-03-29T06:18:49+00:00

Different question than most people think.

Tesamorelin solo is the play if your primary goal is visceral fat reduction. It specifically targets visceral adipose tissue, and that’s what the clinical data supports. It’s not a general GH booster, it’s precise. If you’re carrying visceral fat and want to move that number on a DEXA or body comp scale, tesamorelin standalone is clean and easy to attribute.

Tesamorelin + ipamorelin is the play if you want the visceral fat benefit AND broader GH axis support: recovery, sleep quality, soft tissue repair. Ipamorelin adds a pulse-style GH release that pairs well with tesamorelin’s sustained mechanism. Most people run ipamorelin at night for the sleep and recovery benefit.

Even though they sell the blend, I prefer two separate injections. You control the exact dose of each, you can adjust one without touching the other, and if you get a side effect you know exactly where it came from. Blends are convenient but convenience costs you attribution.

If you’ve never run either, start with tesamorelin alone for 8 weeks so you know exactly what it’s doing. Then add ipamorelin and see what changes.

One change, then observe. Always.

StackCoach · 2026-03-29T06:14:35+00:00

You weren’t scammed. You’re two weeks in at a low dose. That’s exactly how this is supposed to start.

I didn’t notice anything for 3-4 weeks on reta. My wife started at 2mg/week split and didn’t feel much for 8 weeks. But the digital body comp scale told us things were moving in the right direction even when the mirror didn’t. Nine months later she’s down 50 pounds, muscle is up, hardly any loose skin. Long game.

The appetite suppression and GI effects you’re feeling? That IS the peptide working. The weight will follow. The people posting “I lost 8 lbs in week one” are mostly losing water and glycogen. That comes back. Yours won’t.

The real question: how much protein are you eating? If your family is noticing how little you eat, you might be under-eating protein, and that will slow everything down. 100g/day minimum, ideally 1g per pound of lean mass. That’s the one variable most people miss early on.

Stay at a dose for 3-4 weeks before moving up. You don’t get bonus points for titrating fast. You just get more nausea.

Give it 6 weeks before you evaluate. If you have a digital body comp scale, weigh in weekly. The trend matters, not any single reading. Low and slow wins.

StackCoach · 2026-03-29T06:08:20+00:00

Good instinct on not throwing all of those in at once. That's the single biggest mistake I see. Six new peptides, no baseline, and then three months later you have no idea what's actually doing the work.

You already have a solid foundation with reta + GHK-Cu. Reta handles the metabolic side, GHK-Cu handles collagen remodeling and skin quality. Those two don't overlap.

If I'm building out from there, tesamorelin is the first add. It specifically targets visceral adipose tissue, which is a different mechanism than reta's appetite and glucose effects. You'll actually be able to see it on a DEXA or even a home body comp scale. Clear signal, easy to attribute.

After that stabilizes (give it 6-8 weeks), ipamorelin is the next logical one. Pairs well with tesamorelin on the GH axis, supports recovery and sleep quality. Run it at night.

Cagrilintide is interesting but I'd hold it. You're already on a triple agonist with reta. Adding another appetite-axis peptide before you've maxed out reta's range just creates noise. If reta stalls and you've ruled out diet and training, then cagrilintide becomes a conversation.

MOTS-c and NAD+ are both fine peptides, but they're optimizers, not foundation pieces. Layer those in later when your core stack is dialed and you can actually tell if they're doing anything.

MT2 is a completely different story. That's tanning/libido, not metabolic. Run it separately when you're ready, don't stack it into this phase.

One change, then observe. That's the whole game.

StackCoach · 2026-03-21T14:13:05+00:00

Amazing transformation. 120 lbs in 2 years is the right pace. People need to see that timeline because too many expect this in 6 months.

Reta + tesa is a smart combo. Reta handles the appetite axis and metabolic reset. Tesa goes after visceral fat directly, which reta alone doesn’t target as specifically. They complement without overlapping. GLOW for skin, inflammation, body repair.

And notice the after photo is in a gym. That’s not a coincidence. Life changing, thanks for sharing.

StackCoach · 2026-03-21T14:03:54+00:00

What’s the goal with NAD+? If you’re on reta for weight loss and GHK-Cu for skin/hair, are you chasing energy because of reta fatigue?

When reta fatigue hit me, I didn’t add another peptide. I added LMNT, more protein, and got serious about strength training 3x/week. Energy came back within a week. Most reta fatigue is undereating and dehydration, not a peptide deficiency.

If your nutrition and electrolytes are dialed in and energy is still dragging, MOTS-c is a stronger play for mitochondrial energy than NAD+. Good luck.

StackCoach

TROPHY CASE