Peptide Stack Calculator
Build a complete peptide stack with custom doses, weekly schedule, interaction checks, and cost estimates — all in one tool.
What is Peptide Stacking?
Peptide stacking is the practice of using two or more peptides simultaneously to achieve synergistic effects. Rather than relying on a single compound, stacking allows you to target multiple biological pathways at once. For example, combining a growth hormone secretagogue like CJC-1295 with Ipamorelin amplifies natural GH release far beyond what either peptide achieves alone. Similarly, stacking a healing peptide like BPC-157 with a weight loss peptide like semaglutide can provide gut protection while promoting fat loss.
Timing is a critical factor in peptide stacking. Some peptides must be taken fasted (such as Ipamorelin and HGH Fragment 176-191), while others can be taken at any time (like BPC-157 and TB-500). Understanding the timing requirements of each peptide in your stack ensures you get the maximum benefit from every injection. Grouping fasted peptides together in morning or bedtime windows simplifies your schedule and improves adherence.
Common peptide stacks are built around specific goals: healing and recovery (BPC-157 + TB-500), growth hormone optimization (CJC-1295 + Ipamorelin), weight management (semaglutide + BPC-157), and comprehensive recovery (BPC-157 + TB-500 + Ipamorelin). The key to effective stacking is selecting peptides with complementary mechanisms of action while avoiding compounds that conflict or overlap. Use the interaction checker first to verify compatibility. For dosing guidance, browse our dosage articles or check individual peptide profiles.
Popular Peptide Stacks
How to Use This Calculator
- 1.Choose a preset stack for quick start, or search and select individual peptides from the grid. Selected peptides appear in blue.
- 2.Customize each peptide by clicking its row: adjust dose, frequency, timing, and cycle length. Optionally add reconstitution info for syringe units and cost calculations.
- 3.Review interaction warnings. The calculator checks all pairs for synergies, cautions, and conflicts using our database of 50+ interactions.
- 4.Click "Generate Stack Plan" to see your summary cards, weekly calendar schedule, and export options. Switch between grid and list views.
- 5.Copy your schedule, share via link, or print it. The share link encodes your full stack configuration so others can load it instantly.
Frequently Asked Questions
Can you mix multiple peptides in one syringe?
Some peptides can be mixed in the same syringe for convenience, but this is generally not recommended unless you are certain about their chemical compatibility. Peptides like BPC-157 and TB-500 are commonly drawn into the same syringe without issues. However, peptides with different pH requirements or those that may interact chemically should always be injected separately. When in doubt, use separate syringes and rotate injection sites.
How many peptides can you take at once?
There is no strict limit, but most experienced users run 2-4 peptides simultaneously. Running too many peptides at once makes it difficult to identify which ones are producing results or causing side effects. Start with 1-2 peptides, assess your response over 4-6 weeks, and then consider adding more if needed. Always prioritize peptides that align with your primary goal before adding secondary compounds.
How much time should I leave between injections?
If you are injecting multiple peptides at the same time of day, wait at least 5-10 minutes between injections to allow each peptide to absorb properly. Use different injection sites for each peptide (e.g., left abdomen, right abdomen, thigh). For peptides that need to be taken fasted (like Ipamorelin or HGH Fragment), group them together in your fasted window. There is no need to space them hours apart unless specifically noted.
Can I stack healing peptides with weight loss peptides?
Yes, this is a common and generally safe combination. For example, many users stack BPC-157 with semaglutide, as BPC-157 can help protect the gut lining from GLP-1 related gastrointestinal side effects while providing its own healing benefits. Similarly, TB-500 can be combined with weight loss peptides for users recovering from injuries. The key is to ensure the peptides do not have conflicting mechanisms of action.
Do I need to cycle peptide stacks?
Cycling recommendations vary by peptide. Growth hormone secretagogues like CJC-1295 and Ipamorelin should typically be cycled (8-12 weeks on, 4 weeks off) to prevent receptor desensitization. Healing peptides like BPC-157 and TB-500 are usually run for specific treatment durations (4-12 weeks) and stopped once healing is achieved. Weight loss peptides like semaglutide and tirzepatide are generally used continuously under medical supervision. Check each peptide individually for cycling guidelines.
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