How long should a TB-500 cycle be?

Standard Cycle Structure

The canonical TB-500 protocol has three phases:

Loading phase (weeks 1–6)

• Dose: 5 mg subcutaneous, twice weekly
• Purpose: establish tissue-level concentration, initiate repair response
• Example schedule: Monday and Thursday injections

Maintenance phase (weeks 7–10)

• Dose: 2.5 mg subcutaneous, once weekly
• Purpose: sustain healing effect while reducing total exposure
• Example: single Wednesday injection

Off period (weeks 11–18)

• No peptide
• Allows body to return to baseline signaling
• Lets you assess true post-cycle status

Variations on the Standard

Short injury-focused cycle (4 weeks)

For mild injuries or early intervention:

• 5 mg twice weekly × 4 weeks
• Total dose: 40 mg
• Skip maintenance if healing is progressing well
• 6–8 week off period after

Extended cycle (12 weeks)

For chronic conditions or major injuries:

• 5 mg twice weekly × 8 weeks loading
• 2.5 mg weekly × 4 weeks maintenance
• Requires good tolerability and clear clinical benefit
• Consider monitoring labs before extending further

Pulse protocol

For athletes or users wanting periodic healing support:

• Loading 5 mg twice weekly × 4 weeks
• Off 8–12 weeks
• Repeat as needed
• Aims to avoid continuous exposure while maintaining healing support

Why Not Continuous Indefinite Dosing

• Cost: $300–$600/month adds up fast over years
• Unknown long-term safety: no data beyond 3–6 months of continuous use
• Theoretical cancer concern: chronic pro-angiogenic signaling potentially increases risk over time
• Diminishing returns: after tissue repair completes, continued dosing likely provides little additional benefit
• Tissue signaling adaptation: receptors and pathways may downregulate with continuous stimulation

How to Choose Your Cycle Length

Factors favoring shorter cycles (4 weeks)

• Early intervention for acute injury
• Mild or moderate condition
• Young, healthy patient
• Cost sensitivity
• First-time use to assess individual response

Factors favoring standard cycles (8–10 weeks)

• Chronic tendonitis or tendinopathy
• Post-surgical recovery
• Significant injury requiring longer tissue remodeling
• Combining with BPC-157 stack

Factors favoring extended cycles (12+ weeks)

• Severe recalcitrant injuries
• Partial tendon tears managed non-surgically
• Chronic inflammation conditions
• Clear continued benefit from ongoing use

Off Period Length

Standard off period: 4–8 weeks. Some practitioners use up to 12 weeks off between cycles.

Short off (4 weeks)

• Healing still active when next cycle starts
• Continued support for chronic conditions

Longer off (8–12 weeks)

• Full return to baseline tissue signaling
• Allows honest assessment of whether next cycle is needed
• Reduces cumulative exposure over years

Signs Your Cycle Is Working

• Pain reduction over 2–4 weeks
• Improved range of motion or function
• Better sleep (common anecdotal report)
• Faster recovery from training stress
• Subjective well-being improvements

Signs Your Cycle Isn't Working

• No noticeable change by week 4–6
• Continued pain and inflammation at same level
• No improvement in function

If nothing is changing by week 6, reassess: wrong dose, wrong indication, undiagnosed issue, or non-responder. Don't extend indefinitely hoping for eventual effect.

Multiple Cycles Per Year

Reasonable upper limit for most users: 2–3 cycles per year. This translates to roughly 16–30 weeks on TB-500 annually, with interspersed off periods.

More than this starts approaching continuous use and inherits those concerns.

Combining Cycle Planning With BPC-157

If stacking TB-500 with BPC-157:

• Both can follow similar cycle length (4–8 weeks)
• BPC-157 cycling is less critical — some users dose indefinitely without issue
• TB-500 cycling is more important given pro-angiogenic concerns

When to Stop Mid-Cycle

• Unexplained adverse symptoms
• New pain or unusual sensations beyond injury area
• Signs of infection at injection sites
• Unexplained lymph node changes
• Healing complete before cycle end — graceful early stop is fine

Labs During Extended Cycles

For cycles > 8 weeks or frequent cyclic use, reasonable labs:

• CBC baseline and every 3–6 months
• Comprehensive metabolic panel
• Inflammation markers (CRP, ESR)
• Age-appropriate cancer screenings current

Bottom Line

The standard TB-500 cycle is 6–8 weeks of active dosing followed by 4–8 weeks off. Avoid continuous indefinite dosing due to unclear long-term safety and cost. For significant injuries, pair with BPC-157 for the 6–8 week cycle and reassess during the off period whether another cycle is warranted.

See the TB-500 guide. Related: cancer concerns, BPC-157 stack.