Peptide

Mod GRF 1-29

Also known as

CJC-1295 without DAC · CJC-1295 no DAC · Modified GRF 1-29 · Mod GRF · Mod GRF (1-29) · CJC no DAC · tetra-substituted GRF 1-29 · tetrasubstituted GRF (1-29) · CJC-1295 (no DAC) · CJC-1295 No-DAC · modGRF

Community talk. May contain inaccuracies. Not medical advice. Not a protocol. Not for human or animal use.

What it is

Growth-hormone release signal	Mod GRF 1-29 is a modified GHRH peptide that signals the pituitary to release growth hormone. It is often called CJC-1295 no DAC.
No DAC is a distinct form	DAC adds an albumin-binding attachment. Weekly DAC charts and studies do not establish no-DAC Mod GRF's exposure or effects.

Notes

Mod GRF 1-29 is the short-acting GHRH peptide often called CJC-1295 no DAC. People discuss it for sleep, workout recovery and gradual body-composition changes, usually alongside Ipamorelin or GHRP-2. Reports include improvements, no noticeable change and unwanted effects; combinations make Mod GRF's own contribution hard to identify.

A signal for the body's growth-hormone release. GHRH means growth-hormone-releasing hormone. Mod GRF is a modified 29-amino-acid fragment with four substitutions. It signals the pituitary rather than supplying growth hormone itself; it is not a local injury-repair peptide. FDA 2024 PCAC briefing on CJC-related substances (Official context · Accessed 2026-09-30)

No DAC and with DAC are different forms. DAC adds an albumin-binding attachment. Forums use “CJC” loosely, sometimes for either form. A weekly DAC chart or study cannot establish the amounts, timing or effects of no-DAC Mod GRF. FDA 2024 PCAC briefing on CJC-related substances (Official context · Accessed 2026-09-30) · r/Peptides: 6 mg/15 mg blend and 500 mcg total (Community discussion · Accessed 2026-09-30)

Source context — FDA 2024 PCAC briefing on CJC-related substances: 2024 advisory background, not a current legal clearance or risk-rate estimate; studies mainly DAC. Article-derived prose kept below200 words.

Source context — r/Peptides: 6 mg/15 mg blend and 500 mcg total: Unverified labels; no-DAC identity assumed in reply, not chemically verified. Comments contain unit errors and advice not reproduced.

What people notice

Sleep and recovery vary	A nine-week GHRP-2 combination account described better sleep, energy, appetite and skin. Other logs describe disrupted sleep or no sleep change after six weeks.
Gradual physique reports	One changing Mod/Ipa/GHRP-2 log reported about three pounds gained with tape-estimated body fat essentially unchanged. Food intake and training changed too.

Notes

Sleep and recovery are tangible goals; responses differ. A nine-week GHRP-2 combination account described better sleep, appetite, energy and skin. Another early log described disrupted sleep. A six-week Ipamorelin thread reported neither a sleep change nor an acute effect. r/Peptides: nine-week GHRP-2/Mod GRF account (Community discussion · Accessed 2026-09-30) · r/Peptides: documenting GHRP-2 and Mod GRF (Personal report · Accessed 2026-09-30) · r/Peptidesource: CJC no DAC + Ipamorelin for six weeks (Community discussion · Accessed 2026-09-30)

Muscle and fat-loss stories unfold alongside training and diet. One changing Mod/Ipa/GHRP-2 log reported about three pounds gained with tape-estimated body fat essentially unchanged. Food intake and a high-volume lifting program changed too. The weight change does not establish new muscle caused by Mod GRF. r/Peptides: switching partner and documenting training outcomes (Personal report · Accessed 2026-09-30)

Source context — r/Peptides: nine-week GHRP-2/Mod GRF account: Deleted account identities prevent verifying that all deleted replies are same author. Blend effects, no objective body-composition endpoint.

Source context — r/Peptides: documenting GHRP-2 and Mod GRF: Anonymous uncontrolled stack log. Preparation and purchase text inspected but excluded. Shoulder result belongs to TB-500/stretching; planned schedule subsequently confirmed, not efficacy proof.

Source context — r/Peptidesource: CJC no DAC + Ipamorelin for six weeks: Unverified subject and product; moderator-required third-person language; explicit GPT reference; inconsistent updates. No verified chronology or component attribution.

Source context — r/Peptides: switching partner and documenting training outcomes: Changing two secretagogues, training/deload and high calorie intake confound outcomes. No component-specific efficacy.

Doses people talk about

Per-administration charts	100–200 mcg Mod GRF beneath the skin per administration recurs; wider talk spans 50–300 mcg, one to three times daily. A 100-mcg 'saturation' ceiling is disputed lore.
Keep the partners separate	One log used Mod GRF 100 mcg plus GHRP-2 100 mcg twice daily: 200 mcg/day of each. Ipa reports include 100/100 nightly or 200/300 per administration, meaning Mod GRF/Ipamorelin.
Blend totals differ from components	One discussion assumed no DAC for a labeled 6 mg CJC/15 mg Ipa blend and calculated 500 mcg combined as about 143 mcg CJC plus 357 mcg Ipa. Equal-ratio blends have different component amounts.

Notes

100–200 mcg per administration in the existing charts; wider talk is 50–300 mcg. These are reported SubQ amounts, not a recommended range. The older record describes one to three administrations daily. Its 100-mcg “saturation” claim is receptor lore, not a validated ceiling; forum replies disagree. r/Peptides: 6 mg/15 mg blend and 500 mcg total (Community discussion · Accessed 2026-09-30)

Keep each component and the daily total separate. An opened log confirmed 100 mcg Mod GRF plus 100 mcg GHRP-2 twice daily: 200 mcg/day of each. Ipamorelin accounts include 100/100 nightly and 200/300 per administration; other old variants are 100/200 or 200/200. Slash amounts here mean Mod GRF/partner, not one combined dose. r/Peptides: documenting GHRP-2 and Mod GRF (Personal report · Accessed 2026-09-30) · r/Peptidesource: CJC no DAC + Ipamorelin for six weeks (Community discussion · Accessed 2026-09-30) · r/Peptides: no-DAC/Ipamorelin versus HGH (Community discussion · Accessed 2026-09-30)

500 mcg total blend is not 500 mcg of each. A discussion labeled 6 mg CJC/15 mg Ipamorelin calculated approximately 143 mcg/357 mcg from 500 mcg combined. The reply assumed no DAC. Equal-ratio 5/5 or 10/10 mg blends differ; their 200–400 mcg combined talk means 100+100 or 200+200. r/Peptides: 6 mg/15 mg blend and 500 mcg total (Community discussion · Accessed 2026-09-30)

Source context — r/Peptides: no-DAC/Ipamorelin versus HGH: Uncontrolled combination accounts; diet/training and TRT confounding; ambiguous CJC labels in some replies; reject hyperplasia, safety and IU equivalence claims.

Half-life, onset & duration

Felt onset	Old reports place warmth or flushing at 5–30 minutes and sleep changes in the first week or two. A newer restart account noticed recovery after three weeks.
Felt duration	Warmth is described as fading in 10–60 minutes. A reliable single-dose sleep or recovery window is unknown; multiweek physique stories answer a different question.
Half-life	About 25–30 minutes is circulated lore, without an exact-product human measurement. The 6.7-minute IV value belongs to another analog; 5.8–8.1 days belongs to DAC CJC.

Notes

Minutes for warmth; days or weeks for sleep reports—or no change. Old reports place flushing at 5–30 minutes and sleep/dream changes in the first week or two. One newer thread mentions warmth around ten minutes, but its 300/300 updates conflict. Another author described recovery and deeper sleep after a three-week restart with a diet change; six weeks could also bring no obvious effect. r/Peptidesource: CJC no DAC + Ipamorelin for six weeks (Community discussion · Accessed 2026-09-30) · r/Peptides: no-DAC/Ipamorelin versus HGH (Community discussion · Accessed 2026-09-30)

A brief sensation and lasting benefit are different questions. The existing accounts describe warmth fading in 10–60 minutes, weeks-to-months recovery/recomp narratives, and sleep/recovery fading days to a few weeks after stopping. These are anecdotes; the opened logs do not establish one-dose benefit duration or a dependable post-stop window. r/Peptides: documenting GHRP-2 and Mod GRF (Personal report · Accessed 2026-09-30) · r/Peptides: no-DAC/Ipamorelin versus HGH (Community discussion · Accessed 2026-09-30)

About 25–30 minutes is circulated Mod GRF lore. The original record gives 25–30 minutes; opened Reddit and MuscleMecca posts repeat roughly 30 minutes without an exact-product human clearance measurement. A Reddit reply separately repeats about two hours for Ipamorelin. Neither establishes the blend's half-life or benefit duration. r/Peptides: GH test concern during Ipamorelin/Mod GRF (Personal report · Accessed 2026-09-30) · MuscleMecca: GH pulse regulation comparison (Community guide · Accessed 2026-09-30)

6.7 minutes belongs to a different analog and route. Soule's primary abstract measured 6.7 ± 0.5 minutes for one-substitution D-Ala2-GHRH versus 4.3 ± 1.4 minutes for native GHRH during constant IV infusion in ten men. Neither is a SubQ human measurement of four-substitution Mod GRF. Soule et al.: D-Ala2-GHRH half-life in normal men (Official context · Accessed 2026-09-30)

5.8–8.1 days belongs to long-acting DAC CJC. Teichman's abstract studied healthy adults receiving SubQ long-acting CJC; FDA identifies the DAC moiety. GH rose for at least six days and IGF-I for nine-to-eleven days. Those endpoints cannot support no-DAC sleep, physique or duration promises. Teichman et al.: prolonged GH and IGF-I stimulation (Official context · Accessed 2026-09-30) · FDA 2024 PCAC briefing on CJC-related substances (Official context · Accessed 2026-09-30)

Source context — r/Peptides: GH test concern during Ipamorelin/Mod GRF: No baseline GH, mixed product, single random laboratory result; replies do not establish safety or measured half-life.

Source context — MuscleMecca: GH pulse regulation comparison: User-authored explainer, not first-person PK measurement; unverified clinical and desensitization claims rejected.

Source context — Soule et al.: D-Ala2-GHRH half-life in normal men: Primary abstract via Europe PMC; full text not inspected; one-substitution analog, not four-substitution SubQ Mod GRF.

Source context — Teichman et al.: prolonged GH and IGF-I stimulation: Primary abstract only. FDA identifies DAC moiety; do not transfer kinetics or abstract safety conclusion to Mod GRF.

Cycles people discuss

Weeks to months	8–12-week blocks recur, with 12–16 weeks or longer also discussed. Opened accounts include nine weeks with GHRP-2 and twelve weeks with Ipa/GHK-Cu.
Breaks disagree	Four weeks off, 4–8 weeks off, equal time on/off and five-on/two-off all appear beside daily use. Neither receptor-reset claims nor a 16-week maximum is established.

Notes

8–12-week blocks; some describe 12–16 weeks or longer. Opened reports include nine weeks with GHRP-2, twelve weeks with Ipa/GHK-Cu, and six months in a mixed thread. Old charts include four-to-six-week probes and months-long runs. Course length does not demonstrate effectiveness or long-term safety. r/Peptides: nine-week GHRP-2/Mod GRF account (Community discussion · Accessed 2026-09-30) · r/Peptides: twelve-week stack and planned time off (Personal report · Accessed 2026-09-30) · r/Peptides: no-DAC/Ipamorelin versus HGH (Community discussion · Accessed 2026-09-30)

Break patterns disagree. Old talk includes about four weeks off, four-to-eight weeks off, or equal time on/off, plus five days on/two off versus daily use. A forum question proposes three months on/one off; an actual log argues breaks are unnecessary. Neither receptor-reset reasoning nor a claimed 16-week maximum is established. r/Peptides: indefinite cycling question (Community discussion · Accessed 2026-09-30) · r/Peptides: documenting GHRP-2 and Mod GRF (Personal report · Accessed 2026-09-30)

Source context — r/Peptides: twelve-week stack and planned time off: Three-compound stack; no posted paired lab results inspected. GHK-specific amounts are not Mod GRF doses.

Source context — r/Peptides: indefinite cycling question: Question, not completed exposure. Neither cancer reassurance nor pituitary damage/16-week ceiling is established.

Stacks

Ipamorelin or GHRP-2	These are frequent partners, in separate products or blends. Their amounts remain separate, and the combination accounts cannot isolate Mod GRF's contribution.
GHRP-6 or Hexarelin	Older discussions also pair these secretagogues with Mod GRF. Partner-specific hunger, cortisol/prolactin and desensitization claims remain community lore.
Other recovery layers	BPC-157, TB-500 and GHK-Cu appear in broader recovery accounts. One shoulder-improvement log also involved TB-500 and stretching.

Notes

Usually injected beneath the skin in combination accounts. SubQ means subcutaneous. Ipamorelin and GHRP-2 are different growth-hormone secretagogues paired with it. Separate products and premixed blends appear; occasional intramuscular talk does not establish equivalence, and the record does not support an oral substitute. r/Peptides: documenting GHRP-2 and Mod GRF (Personal report · Accessed 2026-09-30)

+ GHRP-6: Strong pulse with notable hunger — often cut-unfriendly. [community]

+ Hexarelin: Discussed for strong pulses but more receptor desensitization / cortisol concern in bro science. [community]

The partner changes the experience. GHRP-2/6 hunger can help bulking or frustrate cutting; Ipamorelin is often favored for less hunger in old discussions. GHRP-2/6 and Hexarelin carry cortisol/prolactin concerns in older lore, not measured Mod-specific risks; Hexarelin also brings desensitization talk. Adding BPC/TB-500, overlapping GHRH products or changing partners makes attribution harder. The log's later shoulder improvement involved TB-500 and stretching. r/Peptides: documenting GHRP-2 and Mod GRF (Personal report · Accessed 2026-09-30)

+ BPC-157 / TB-500: “Recover harder, sleep better” lifestyle stacks — heavy confounding; not a formal GH endpoint protocol. [community]

Source context — r/Peptides: twelve-week stack and planned time off: Three-compound stack; no posted paired lab results inspected. GHK-specific amounts are not Mod GRF doses.

Watch for

Sleep and fluid effects	Reports include daytime sleepiness, interrupted sleep, water retention, itchy red sites, headache, tingling, joint aches and morning fog.
Lower amounts did not fix one account	One Mod/Ipa user reported worse sleep at both 150 mcg and 50 mcg of each ingredient, plus jitteriness. A year later, most of the vial remained unused because it felt bad.
Hormone and product concerns	FDA's review flags impurities, immune reactions and possible GH/IGF-related glucose, fluid-retention and tumor concerns. Exact-form long-term safety remains uncertain.

Notes

Sleepiness, interrupted sleep, puffiness and itchy injection sites. An author at 200 mcg Mod/300 mcg Ipa described water retention and daytime sleepiness; another switched to morning use because evening use disrupted sleep. A GHRP-2 combination reply reported itchy red spots. Other existing accounts mention headache, tingling, joint aches and morning fog. r/Peptides: no-DAC/Ipamorelin versus HGH (Community discussion · Accessed 2026-09-30) · r/Peptides: GH test concern during Ipamorelin/Mod GRF (Personal report · Accessed 2026-09-30) · r/Peptides: nine-week GHRP-2/Mod GRF account (Community discussion · Accessed 2026-09-30)

Lowering a blend did not resolve one user's insomnia. Jay_Tex reported worse sleep at both 150 mcg and 50 mcg of each ingredient in a Mod GRF/ipamorelin premix, plus daytime jitteriness. A year later, the same author said most of the vial went unused because it felt bad. Other hormone treatment and longstanding sleep problems prevent isolating Mod GRF; the later update does not support eventual adaptation. Mod GRF: Insomnia and overstimulation (Personal report · Accessed 2026-10-09)

Product quality and hormone-axis risks remain relevant. FDA's 2024 review discusses impurities, immune reactions and possible GH/IGF-related glucose, fluid-retention and tumor concerns. These are safety concerns, not Mod-specific incidence estimates. Pregnancy, breastfeeding and repeated long-term wellness use lack reassuring evidence in this record. FDA 2024 PCAC briefing on CJC-related substances (Official context · Accessed 2026-09-30)

Source context — r/Peptides: GH test concern during Ipamorelin/Mod GRF: No baseline GH, mixed product, single random laboratory result; replies do not establish safety or measured half-life.

Source context — Mod GRF: Insomnia and overstimulation: Premixed product, longstanding sleep difficulties and other hormone treatment; no ingredient-specific causality or prevalence. Doctor comments are secondhand.

Full notes

What Mod GRF actually is

A signal for the body's growth-hormone release. GHRH means growth-hormone-releasing hormone. Mod GRF is a modified 29-amino-acid fragment with four substitutions. It signals the pituitary rather than supplying growth hormone itself; it is not a local injury-repair peptide. Official context Community
No DAC and with DAC are different forms. DAC adds an albumin-binding attachment. Forums use “CJC” loosely, sometimes for either form. A weekly DAC chart or study cannot establish the amounts, timing or effects of no-DAC Mod GRF. Official context Reddit
Usually injected beneath the skin in combination accounts. SubQ means subcutaneous. Ipamorelin and GHRP-2 are different growth-hormone secretagogues paired with it. Separate products and premixed blends appear; occasional intramuscular talk does not establish equivalence, and the record does not support an oral substitute. Personal report Community

What people hope to notice

Sleep and recovery are tangible goals; responses differ. A nine-week GHRP-2 combination account described better sleep, appetite, energy and skin. Another early log described disrupted sleep. A six-week Ipamorelin thread reported neither a sleep change nor an acute effect. Reddit Personal report Reddit
Muscle and fat-loss stories unfold alongside training and diet. One changing Mod/Ipa/GHRP-2 log reported about three pounds gained with tape-estimated body fat essentially unchanged. Food intake and a high-volume lifting program changed too. The weight change does not establish new muscle caused by Mod GRF. Personal report

Doses people discuss

mcg means micrograms; 1,000 mcg equals 1 mg. These numbers describe discussion, not a personal regimen.

100–200 mcg per administration in the existing charts; wider talk is 50–300 mcg. These are reported SubQ amounts, not a recommended range. The older record describes one to three administrations daily. Its 100-mcg “saturation” claim is receptor lore, not a validated ceiling; forum replies disagree. Community Reddit
Keep each component and the daily total separate. An opened log confirmed 100 mcg Mod GRF plus 100 mcg GHRP-2 twice daily: 200 mcg/day of each. Ipamorelin accounts include 100/100 nightly and 200/300 per administration; other old variants are 100/200 or 200/200. Slash amounts here mean Mod GRF/partner, not one combined dose. Personal report Reddit Reddit Community
500 mcg total blend is not 500 mcg of each. A discussion labeled 6 mg CJC/15 mg Ipamorelin calculated approximately 143 mcg/357 mcg from 500 mcg combined. The reply assumed no DAC. Equal-ratio 5/5 or 10/10 mg blends differ; their 200–400 mcg combined talk means 100+100 or 200+200. Reddit Community

Half-life

About 25–30 minutes is circulated Mod GRF lore. The original record gives 25–30 minutes; opened Reddit and MuscleMecca posts repeat roughly 30 minutes without an exact-product human clearance measurement. A Reddit reply separately repeats about two hours for Ipamorelin. Neither establishes the blend's half-life or benefit duration. Community Personal report Community guide

Onset: when people notice something

Minutes for warmth; days or weeks for sleep reports—or no change. Old reports place flushing at 5–30 minutes and sleep/dream changes in the first week or two. One newer thread mentions warmth around ten minutes, but its 300/300 updates conflict. Another author described recovery and deeper sleep after a three-week restart with a diet change; six weeks could also bring no obvious effect. Community Reddit Reddit

Duration: how long a change lasts

A brief sensation and lasting benefit are different questions. The existing accounts describe warmth fading in 10–60 minutes, weeks-to-months recovery/recomp narratives, and sleep/recovery fading days to a few weeks after stopping. These are anecdotes; the opened logs do not establish one-dose benefit duration or a dependable post-stop window. Community Personal report Reddit

Cycles and time off

8–12-week blocks; some describe 12–16 weeks or longer. Opened reports include nine weeks with GHRP-2, twelve weeks with Ipa/GHK-Cu, and six months in a mixed thread. Old charts include four-to-six-week probes and months-long runs. Course length does not demonstrate effectiveness or long-term safety. Community Reddit Personal report Reddit
Break patterns disagree. Old talk includes about four weeks off, four-to-eight weeks off, or equal time on/off, plus five days on/two off versus daily use. A forum question proposes three months on/one off; an actual log argues breaks are unnecessary. Neither receptor-reset reasoning nor a claimed 16-week maximum is established. Community Reddit Personal report
This is not an anabolic-steroid cycle. The older record describes no universal steroid-style PCT and skip-rather-than-double missed-dose talk. Those are community conventions, not instructions or proof that the hormone axis is protected. Community

What can go wrong

Sleepiness, interrupted sleep, puffiness and itchy injection sites. An author at 200 mcg Mod/300 mcg Ipa described water retention and daytime sleepiness; another switched to morning use because evening use disrupted sleep. A GHRP-2 combination reply reported itchy red spots. Other existing accounts mention headache, tingling, joint aches and morning fog. Reddit Personal report Reddit Community
Product quality and hormone-axis risks remain relevant. FDA's 2024 review discusses impurities, immune reactions and possible GH/IGF-related glucose, fluid-retention and tumor concerns. These are safety concerns, not Mod-specific incidence estimates. Pregnancy, breastfeeding and repeated long-term wellness use lack reassuring evidence in this record. Official context Community

What the discussions help explain

Empty-stomach rules create real inconvenience and disagreement. Logs describe bedtime, morning or post-workout use. Old meal gaps range from 90 minutes to two hours before, then 20–60-plus minutes afterward; opened logs also use three hours before. One poster struggled to fit food around twice-daily use. The blunting explanation is circulated reasoning, not a tested best schedule. Community Personal report
A positive report can still be difficult to interpret. One author first considered six months ineffective, then praised sleep and recovery after restarting with a new eating plan. Another Hypermuscles user described fat-loss impressions and slightly better sleep despite still sleeping only about four hours; back injury and an AAS cycle complicated muscle claims. Reddit Personal report
The partner changes the experience. GHRP-2/6 hunger can help bulking or frustrate cutting; Ipamorelin is often favored for less hunger in old discussions. GHRP-2/6 and Hexarelin carry cortisol/prolactin concerns in older lore, not measured Mod-specific risks; Hexarelin also brings desensitization talk. Adding BPC/TB-500, overlapping GHRH products or changing partners makes attribution harder. The log's later shoulder improvement involved TB-500 and stretching. Community Personal report
A flush or laboratory change cannot authenticate a vial. The six-week thread reported IGF-1 121 to 134 ng/mL without obvious benefit. Later 150/150 and contradictory 300/300 updates, third-person rules and a GPT reference weaken its chronology. Absence of warmth does not prove a fake product; presence of warmth does not prove effectiveness. Reddit
Convenience comparisons are not dose conversions. The older record contrasts fewer DAC injections, oral MK-677, related Sermorelin and Tesamorelin, and exogenous HGH. “Natural pulses” or “GH bleed” language expresses preferences; it does not establish a safety ranking, suppression protection or equal HGH IU exposure. Community Reddit Community guide
Lowering a blend did not resolve one user's insomnia. Jay_Tex reported worse sleep at both 150 mcg and 50 mcg of each ingredient in a Mod GRF/ipamorelin premix, plus daytime jitteriness. A year later, the same author said most of the vial went unused because it felt bad. Other hormone treatment and longstanding sleep problems prevent isolating Mod GRF; the later update does not support eventual adaptation. Personal report

What the formal timing values actually measured

Half-life measures the fall in the amount being measured. It does not measure how long someone sleeps better or recovers faster.

6.7 minutes belongs to a different analog and route. Soule's primary abstract measured 6.7 ± 0.5 minutes for one-substitution D-Ala2-GHRH versus 4.3 ± 1.4 minutes for native GHRH during constant IV infusion in ten men. Neither is a SubQ human measurement of four-substitution Mod GRF. Official context
5.8–8.1 days belongs to long-acting DAC CJC. Teichman's abstract studied healthy adults receiving SubQ long-acting CJC; FDA identifies the DAC moiety. GH rose for at least six days and IGF-I for nine-to-eleven days. Those endpoints cannot support no-DAC sleep, physique or duration promises. Official context Official context