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6 weeks on Reta, and surprising result.

35 replies15 peopleMay 22, 2026☆ Follow
Summary

Why did weight go up one week on retatrutide despite no routine changes?

A single weekly scale reading showed a 0.5 kg gain after steady loss, but body-composition checks later confirmed continued fat reduction and slight muscle gain. Participants attribute the jump to water retention from harder lifting, DOMS, glycogen, or daily fluid shifts rather than a true stall. Daily morning weigh-ins and weekly averages are repeatedly advised so trends can be seen without reacting to normal variance. Titration decisions should wait at least two weeks unless appetite clearly returns.

What this discussion establishesWhere people disagree

Some prefer weekly weigh-ins to reduce anxiety while others insist daily tracking is essential for early problem detection.

Still open

Whether jumping straight to 4 mg produces meaningfully better results than gradual titration for this user.

Nothing here is advice.

35 replies · 15 people
ClearQuill84archiveopening postMay 22

Week six on the medication had been smooth until the usual Friday morning weigh-in produced an unexpected half-kilo increase. Dosing began at 1 mg weekly and moved to 2 mg on week three, delivering an average 1.5 kg drop each week. Nothing obvious changed except starting 0.5 mg Epithalon daily and adding roughly 30 g extra protein. Training stayed at five gym days, the two-meal high-protein low-carb pattern held, and sleep remained around seven hours. Food noise stayed suppressed and satiety felt normal, yet the scale moved the wrong way. The next planned increase is to 3 mg on Monday, but talk of a 4 mg threshold is making the user consider a bigger jump.

SlowSignal40archiveMay 22
↳ replying to @ClearQuill84 (opening post)

Two things worth checking are total daily calories actually eaten and whether any muscle was added. Daily weighing catches problems early enough to fix them quickly.

ClearQuill84archiveMay 22
↳ replying to @SlowSignal40

A gym scale reading last Saturday showed 5 kg fat lost and 1 kg muscle lost over the month, which prompted the extra protein. The calorie deficit stayed the same except for the added 30 g whey isolate.

SlowSignal40archiveMay 22
↳ replying to @ClearQuill84

A gram of protein supplies four calories, so 30 g adds 120 calories; if nothing else was cut the deficit cannot be identical. Even that amount spread over a week is still short of the 4 000-calorie surplus needed for a pound of gain. Without testosterone on board, adding a pound of muscle in seven days is unlikely, and water weight alone would not account for it either.

ClearQuill84archiveMay 22
↳ replying to @SlowSignal40

Protein calories are real, yet 30 g still should not produce the observed gain. Muscle could not have been added that fast either. A gym scale check tomorrow will show what actually changed. The 4 mg level sounds attractive but the usual advice remains to increase slowly.

SlowSignal40archiveMay 22
↳ replying to @ClearQuill84

Hold the dose until the cause is clear. Daily weighing helps spot issues fast. The surplus needed for the gain would be about 660 extra calories daily; since that did not happen and muscle gain is improbable, water retention is the remaining explanation. A 0.5 mg bump or splitting the dose are options once the picture is clearer.

RustAnchor27archiveMay 22

Morning weigh-ins every day make trends visible across recent meals and drinks without overreacting to single jumps. A weekly average smooths things out. Weighing only once a week makes it harder to separate real change from normal daily swings caused by carbs or salt.

BlueTimber78archiveMay 22

Calories must be lowered again as weight comes off to keep a deficit going. More frequent measurements and a longer trend line give a clearer picture than a single weekly number.

RustAnchor27archiveMay 22
↳ replying to @BlueTimber78

A paid macro-tracking app that automatically lowers calories each week as weight drops can help keep the deficit on target.

CopperSignal27archiveMay 22

Day-to-day and week-to-week fluid shifts of a kilo or two are normal and do not mean energy balance has changed. Early weight loss often includes extra fluid that later stabilizes. Longer tracking shows that apparent stalls or small gains average out to the same fat-loss rate.

ClearQuill84archiveMay 22
↳ replying to @BlueTimber78

The deficit is still in place; the only addition last week was 30 g whey. That amount is unlikely to explain a half-kilo gain after five weeks of steady 1.5 kg drops.

PlainAlder11archiveMay 22

Losing more than three pounds a week can include water. Occasional upward weeks happen and are not a problem. No need to increase yet after just starting 8 mg.

GreenSignal63archiveMay 22

Daily morning weigh-ins logged in an app show the real trend and avoid reacting to a single abnormal reading. Taking three readings each time and averaging them reduces scale error.

ClearQuill84archiveMay 22
↳ replying to @GreenSignal63

Switching to daily checks and multiple readings makes sense now. Weekly snapshots worked during keto but more frequent data may be better while on this medication.

GreenSignal63archiveMay 22
↳ replying to @ClearQuill84

Weekly weigh-ins were used during keto too, but daily tracking feels necessary with this compound to avoid misreading normal fluctuations.

BlueCinder96archiveMay 22

Daily weigh-ins reveal that a hard leg session the day before can add half a kilo from muscle water retention once soreness sets in. A seven-day rolling average removes most of these single-day spikes.

PlainAlder11archiveMay 22

Weighing Tuesday and Friday mornings with an app and a personal spreadsheet that also records BMI and body-fat percentage gives enough data points.

ClearQuill84archiveMay 22
↳ replying to @BlueCinder96

The harder lifting and skipped cardio sessions this week, plus noticeable soreness, could explain the extra water held in the muscles.

BlueCinder96archiveMay 22
↳ replying to @ClearQuill84

Soreness commonly causes extra fluid retention that varies by person and muscle size.

WryCompass65archiveMay 22

Pauses are common and 3.3 lb weekly loss is probably too rapid. Inflammation from training, water, or glycogen can all raise the scale without changing fat loss. Use the pause to verify the nutrition plan supports a slower 1-1.5 lb weekly target instead of rushing a dose increase.

NorthSparrow68archiveMay 22
↳ replying to @ClearQuill84 (opening post)

Give any stall at least two full weeks before raising the dose. The added protein brings roughly 150 extra calories daily, which might pause progress briefly while the body adjusts. The same vial used for six weeks may have lost potency, as degradation becomes noticeable after about a month.

NorthSparrow68archiveMay 22
↳ replying to @GreenSignal63

Daily numbers are recorded only to calculate weekly averages; single readings can swing five pounds. Weighing at the same time and conditions each morning still leaves visible day-to-day noise that smooths out over weeks. A recent twelve-day plateau resolved after two weeks without a dose change.

ClearQuill84archiveMay 22

All the shared experiences help clarify the situation. A gym scale reading tomorrow will show body-composition details, and the Monday dose decision can wait until then.

WryCompass65archiveMay 22
↳ replying to @ClearQuill84

Body-composition scales change their readings with every weight shift; looking at the full timeline rather than single numbers gives a better view.

SlowSignal40archiveMay 22
↳ replying to @ClearQuill84

Welcome to daily tracking. The culprit appears to be delayed-onset muscle soreness and the fluid that comes with it. Staying at the current dose avoids unnecessary increases.

SlowLedger41archiveMay 22
↳ replying to @WryCompass65

Weekly weigh-ins are preferred because daily ups and downs create unnecessary worry; each person should choose what keeps anxiety low.

ClearHarbour45archiveMay 22
↳ replying to @CopperSignal27

Fluid balance and bathroom frequency can easily swing weight by nearly three pounds between days.

SteadyCinder74archiveMay 22

The medication often produces steady loss with little tracking required. Weekly scale checks are kept but other metrics are ignored; dose increases are considered only when appetite clearly rises again.

ClearQuill84archiveMay 22
↳ replying to @SteadyCinder74

Previous weight loss of 42 kg came from keto and a calorie deficit during a very active job. A new sedentary job plus the same diet led to regaining 15 kg, prompting the current use of the medication. Weekly weigh-ins worked fine on keto, so the recent gain was unexpected and prompted the question.

SteadyCinder74archiveMay 22

The earlier loss without this class of medication is impressive. Plans are to finish a couple more weeks at 2 mg then move to 3 mg for four weeks; the idea of a strict 4 mg minimum is not being followed. The shoulder improvement from one compound is noted and alternatives are being considered.

ClearQuill84archiveMay 22
↳ replying to @SteadyCinder74

The version that combines two compounds is now preferred; adding the missing one separately is planned to address skin concerns.

CopperTimber95archiveMay 22

Older methods of estimating body composition involved calipers or simply pinching fat and checking muscle feel by hand.

WarmMarble23archiveMay 22
↳ replying to @ClearQuill84 (opening post)

A similar pattern occurred: steady drop on 2 mg, then a stall, modest further loss on 3 mg, and renewed drop only after moving to 4 mg. Side effects such as heartburn appeared at the higher dose, especially with late or greasy meals. Taking the intermediate step felt worthwhile.

ClearQuill84archiveMay 23
↳ replying to @WarmMarble23

Heartburn that existed since childhood disappeared once the low-carb diet began.

GreenSignal63archiveMay 23
↳ replying to @CopperTimber95

Calipers are still used by some trainers even though digital body-composition machines are widely available.

ClearQuill84archiveMay 23

Gym-scale readings six days apart showed a small fat loss and slight muscle gain. The earlier home-scale reading that started the thread was taken before using the bathroom, likely inflating the number. Net loss over the six days was 0.9 kg. The home scale reads 0.4 kg higher than the gym unit. The medication appears to support simultaneous fat loss and muscle gain when diet, training, and sleep are consistent.

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6 weeks on Reta, and surprising result. · ZyraTrack Community