What is the best peptide tracking app?

DoseCraft is the most comprehensive peptide tracking app — 90+ compounds with evidence tiers, half-life-aware scheduling, built-in reconstitution calculator, injection-site rotation, and 6 AI coaches. Free tier available; Pro is $59.99/year with a 7-day free trial, or $149.99 Founder Lifetime for the first 1,000 users.

Is DoseCraft a ChatGPT wrapper?

No. DoseCraft's AI is trained on a proprietary corpus of 10,000+ hours of curated peptide-practitioner expertise — protocol audits, bloodwork reviews, cycle logs, interaction matrices — that is not in any general LLM's training set. Every answer comes from expert-reviewed material, not recycled public-web content.

Does DoseCraft work on iPhone?

Yes. DoseCraft is available on iOS 17+ on the Apple App Store. Android and Apple Watch support are on the roadmap.

DoseCraft has a free tier with basic logging and library browsing. Pro ($59.99/year with 7-day trial, $9.99/month, or $149.99 Founder Lifetime) unlocks unlimited protocols, all 6 AI coaches, interaction alerts, outcome correlation, CSV and PDF export.

Can DoseCraft calculate peptide reconstitution?

Yes. DoseCraft has a built-in reconstitution calculator that computes BAC water volume, units-per-draw on insulin syringes, and vial shelf life across every compound in the library.

Is DoseCraft medical advice?

No. DoseCraft is a research and tracking tool. Peptides referenced are sold 'for research use only' by third-party suppliers. DoseCraft does not sell peptides, does not prescribe, and does not constitute medical advice. Always consult a licensed physician.

Can I delete my DoseCraft account?

Yes. Profile → Delete Account performs an irreversible wipe of your account and all associated data. Available in-app and via dosecraftapp.com/delete-account. Apple 5.1.1(v) compliant.

Back to Research

Practical Guide7 min read

Injection Site Rotation: Evidence-Based Best Practices for Peptide Users

SubQ and IM site selection, rotation scheduling, scar tissue prevention, and needle gauge selection

Key Findings

1Consistent injection into the same site causes lipodystrophy — fatty tissue damage that creates lumps, reduces absorption, and can become permanent
2Subcutaneous injection (SubQ) is the standard route for most peptides — use a 29-31 gauge, 1/2 inch needle at a 45-90 degree angle
3Minimum 6 distinct injection sites in a rotation prevents tissue damage during typical peptide protocols
4Keep injection sites at least 1 inch (2.5cm) apart, even within the same anatomical region
5Insulin syringes (29-31G, 1/2 inch) are the gold standard for SubQ peptide injections — thinner needles reduce pain and tissue trauma

Why Rotation Matters

Every injection creates a microscopic wound in the tissue. When you inject into the same spot repeatedly, the body responds with scar tissue formation and fatty tissue changes (lipodystrophy). Lipodystrophy creates hard lumps under the skin that both hurt and reduce peptide absorption — meaning your dose becomes unpredictable. Insulin-dependent diabetics have studied this problem for decades, and the evidence is clear: systematic rotation prevents tissue damage and maintains consistent absorption.

Subcutaneous Injection Sites

Subcutaneous (SubQ) injection delivers the peptide into the fatty tissue layer between the skin and muscle. This is the standard route for most research peptides including BPC-157, TB-500, CJC-1295, Ipamorelin, MOTS-c, and semaglutide.

Abdomen (preferred)	2+ inches from navel, avoid the belt line. Largest SubQ area. Most consistent absorption. Best for beginners.
Upper outer thigh	Front of thigh, upper 1/3, outer side. Good absorption. Easy to reach. Second-best option.
Back of upper arm	Tricep area, pinch the fatty tissue. Slightly harder to self-inject. Good rotation site.
Upper outer buttock	Upper outer quadrant only. Good fat layer in most individuals. Harder to see — use a mirror.
Love handle area	Lateral abdominal region above the hip. Adequate fat layer in most people. Good supplementary site.

For BPC-157 targeting a specific injury: inject SubQ as close to the injury site as possible. For systemic protocols (GH secretagogues, metabolic peptides), injection location does not affect efficacy — choose sites based on comfort and rotation convenience.

Intramuscular Sites (When Applicable)

Most peptides are administered SubQ, not intramuscular (IM). However, some compounds (notably certain GH secretagogues at higher concentrations, or reconstituted HGH) may specify IM delivery. If IM injection is indicated:

IM injection sites

Deltoid muscle — upper arm, lateral head. Use a 25-27G, 1 inch needle. Volume limit: 1mL.
Vastus lateralis — outer mid-thigh. Use a 25-27G, 1-1.5 inch needle. Volume limit: 2mL.
Ventrogluteal — upper outer hip. Requires proper landmark identification. Volume limit: 2mL. Lowest nerve damage risk of all IM sites.
Avoid the dorsogluteal (buttock) site — higher risk of sciatic nerve damage. This is an outdated recommendation that persists in some guides.

Building a Rotation Schedule

The rotation system should be simple enough to follow without thinking. Complexity leads to skipped rotations, which leads to tissue damage. Here is a practical approach:

Site 1 — Monday	Left abdomen (2 inches left of navel)
Site 2 — Tuesday	Right abdomen (2 inches right of navel)
Site 3 — Wednesday	Left upper thigh (outer, upper 1/3)
Site 4 — Thursday	Right upper thigh (outer, upper 1/3)
Site 5 — Friday	Left love handle / lateral abdomen
Site 6 — Saturday	Right love handle / lateral abdomen
Sunday	Rest day, or return to Site 1 with a 1-inch offset from the Monday injection point
Rule	Never inject the same exact spot within a 7-day window. Within each region, shift the injection point by at least 1 inch each time.

For twice-daily protocols (e.g., BPC-157 at 500mcg AM and PM), use the left side in the morning and the right side in the evening. This doubles your effective rotation without adding complexity.

Needle Gauge Selection

29G x 1/2 inch (SubQ standard)	Best balance of comfort and flow rate. Works for all standard peptide concentrations. Most recommended.
30G x 1/2 inch (thin)	Slightly less pain. Slower draw speed. Good for low-volume injections (under 0.3mL).
31G x 5/16 inch (ultra-thin)	Minimal pain. Very slow draw. Best for small doses. May not penetrate deep enough in individuals with thicker subcutaneous tissue.
27G x 1/2 inch	Faster draw. Slightly more pain. Use if reconstituted peptide is viscous or if drawing from a vial with a thick rubber stopper.
25G x 1 inch (IM only)	For intramuscular injections only. Too thick for comfortable SubQ use.
Syringe type	1mL insulin syringes (100 units) with fixed needles. Pre-attached needles reduce dead space and waste.

Preventing Lipodystrophy and Scar Tissue

Evidence-based prevention strategies

Rotate systematically — never inject the same spot within 7 days. Use a tracking app or simple written log.
Space injection points — minimum 1 inch (2.5cm) between injection points, even within the same anatomical region.
Use the smallest effective gauge — 29-31G needles cause less tissue trauma than thicker gauges.
Do not reuse needles — a used needle has a dulled tip that tears tissue rather than cleanly penetrating. Always use a fresh needle.
Vary injection depth slightly — small variations in angle (45 vs 90 degrees) deposit the peptide in slightly different tissue planes.
Inspect injection sites — if you notice any lumps, indentations, thickened skin, or areas of reduced sensation, exclude that site from rotation for at least 4 weeks.
Warm the peptide to room temperature before injecting — cold solutions can cause localized tissue irritation.

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Common Injection Technique Errors

Mistakes that cause unnecessary pain or poor absorption

Injecting too fast — push the plunger slowly over 5-10 seconds. Fast injection causes tissue distension and pain.
Not pinching skin for SubQ — pinch a fold of skin and inject into the fold at 45-90 degrees. This ensures the needle reaches SubQ tissue, not muscle.
Pulling out too fast — wait 5 seconds after pushing the plunger fully, then withdraw. This prevents solution from leaking back through the injection track.
Injecting into scar tissue — hardened tissue reduces absorption and increases pain. Map and avoid damaged areas.
Using expired needles or syringes — manufacturing sterility has a shelf life. Check expiration dates.
Skipping alcohol swab — always swab the injection site with 70% isopropyl alcohol and let it dry for 10 seconds before injecting.

This article is for educational purposes only. Peptide regulations vary by jurisdiction. Always consult a licensed healthcare professional before starting any protocol.

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Related Research

Practical Guide6 min

The Complete Guide to Peptide Reconstitution: Math, Water, Storage, and Shelf Life

A step-by-step guide to reconstituting peptides correctly. Covers bacteriostatic water vs sterile water selection, concentration math for accurate dosing, proper storage temperatures, and shelf life expectations for reconstituted peptides.

Read research

Practical Guide8 min

Peptide Storage and Stability: Reconstitution Best Practices

Proper peptide storage, reconstitution, and handling determine whether you get therapeutic results or inject expensive, degraded amino acids. This guide covers temperature requirements, bacteriostatic water protocols, light protection, and common mistakes.

Read research

Protocol Breakdown8 min

Peptide Cycling: When to Take Breaks and Why

The concept of cycling peptides comes from the performance enhancement world and does not always apply to health optimization. Some compounds run continuously. Others require defined cycles. Understanding the difference is critical for long-term results.

Read research

Injection Site Rotation: Evidence-Based Best Practices for Peptide Users

SubQ and IM site selection, rotation scheduling, scar tissue prevention, and needle gauge selection

Key Findings

1Consistent injection into the same site causes lipodystrophy — fatty tissue damage that creates lumps, reduces absorption, and can become permanent
2Subcutaneous injection (SubQ) is the standard route for most peptides — use a 29-31 gauge, 1/2 inch needle at a 45-90 degree angle
3Minimum 6 distinct injection sites in a rotation prevents tissue damage during typical peptide protocols
4Keep injection sites at least 1 inch (2.5cm) apart, even within the same anatomical region
5Insulin syringes (29-31G, 1/2 inch) are the gold standard for SubQ peptide injections — thinner needles reduce pain and tissue trauma

Why Rotation Matters

Subcutaneous Injection Sites

Abdomen (preferred)	2+ inches from navel, avoid the belt line. Largest SubQ area. Most consistent absorption. Best for beginners.
Upper outer thigh	Front of thigh, upper 1/3, outer side. Good absorption. Easy to reach. Second-best option.
Back of upper arm	Tricep area, pinch the fatty tissue. Slightly harder to self-inject. Good rotation site.
Upper outer buttock	Upper outer quadrant only. Good fat layer in most individuals. Harder to see — use a mirror.
Love handle area	Lateral abdominal region above the hip. Adequate fat layer in most people. Good supplementary site.

Intramuscular Sites (When Applicable)

IM injection sites

Deltoid muscle — upper arm, lateral head. Use a 25-27G, 1 inch needle. Volume limit: 1mL.
Vastus lateralis — outer mid-thigh. Use a 25-27G, 1-1.5 inch needle. Volume limit: 2mL.
Ventrogluteal — upper outer hip. Requires proper landmark identification. Volume limit: 2mL. Lowest nerve damage risk of all IM sites.
Avoid the dorsogluteal (buttock) site — higher risk of sciatic nerve damage. This is an outdated recommendation that persists in some guides.

Building a Rotation Schedule

The rotation system should be simple enough to follow without thinking. Complexity leads to skipped rotations, which leads to tissue damage. Here is a practical approach:

Site 1 — Monday	Left abdomen (2 inches left of navel)
Site 2 — Tuesday	Right abdomen (2 inches right of navel)
Site 3 — Wednesday	Left upper thigh (outer, upper 1/3)
Site 4 — Thursday	Right upper thigh (outer, upper 1/3)
Site 5 — Friday	Left love handle / lateral abdomen
Site 6 — Saturday	Right love handle / lateral abdomen
Sunday	Rest day, or return to Site 1 with a 1-inch offset from the Monday injection point
Rule	Never inject the same exact spot within a 7-day window. Within each region, shift the injection point by at least 1 inch each time.

For twice-daily protocols (e.g., BPC-157 at 500mcg AM and PM), use the left side in the morning and the right side in the evening. This doubles your effective rotation without adding complexity.

Needle Gauge Selection

29G x 1/2 inch (SubQ standard)	Best balance of comfort and flow rate. Works for all standard peptide concentrations. Most recommended.
30G x 1/2 inch (thin)	Slightly less pain. Slower draw speed. Good for low-volume injections (under 0.3mL).
31G x 5/16 inch (ultra-thin)	Minimal pain. Very slow draw. Best for small doses. May not penetrate deep enough in individuals with thicker subcutaneous tissue.
27G x 1/2 inch	Faster draw. Slightly more pain. Use if reconstituted peptide is viscous or if drawing from a vial with a thick rubber stopper.
25G x 1 inch (IM only)	For intramuscular injections only. Too thick for comfortable SubQ use.
Syringe type	1mL insulin syringes (100 units) with fixed needles. Pre-attached needles reduce dead space and waste.

Preventing Lipodystrophy and Scar Tissue

Evidence-based prevention strategies

Rotate systematically — never inject the same spot within 7 days. Use a tracking app or simple written log.
Space injection points — minimum 1 inch (2.5cm) between injection points, even within the same anatomical region.
Use the smallest effective gauge — 29-31G needles cause less tissue trauma than thicker gauges.
Do not reuse needles — a used needle has a dulled tip that tears tissue rather than cleanly penetrating. Always use a fresh needle.
Vary injection depth slightly — small variations in angle (45 vs 90 degrees) deposit the peptide in slightly different tissue planes.
Inspect injection sites — if you notice any lumps, indentations, thickened skin, or areas of reduced sensation, exclude that site from rotation for at least 4 weeks.
Warm the peptide to room temperature before injecting — cold solutions can cause localized tissue irritation.

Track This Protocol

Log doses, monitor interactions, and optimize your stack with AI tools.

Open DoseCraft

Source Compounds

Pharma-grade, third-party tested. Our preferred vendor for the DoseCraft community.

Shop Peptide Partners

Common Injection Technique Errors

Mistakes that cause unnecessary pain or poor absorption

Injecting too fast — push the plunger slowly over 5-10 seconds. Fast injection causes tissue distension and pain.
Not pinching skin for SubQ — pinch a fold of skin and inject into the fold at 45-90 degrees. This ensures the needle reaches SubQ tissue, not muscle.
Pulling out too fast — wait 5 seconds after pushing the plunger fully, then withdraw. This prevents solution from leaking back through the injection track.
Injecting into scar tissue — hardened tissue reduces absorption and increases pain. Map and avoid damaged areas.
Using expired needles or syringes — manufacturing sterility has a shelf life. Check expiration dates.
Skipping alcohol swab — always swab the injection site with 70% isopropyl alcohol and let it dry for 10 seconds before injecting.

This article is for educational purposes only. Peptide regulations vary by jurisdiction. Always consult a licensed healthcare professional before starting any protocol.

Put this research into action

Track your protocol with precision tools. Source pharma-grade compounds from a trusted vendor.

Track in DoseCraft

Build this protocol in 60 seconds. AI-powered dose logging, half-life tracking, and interaction checks.

Open Protocol Builder

Get the Compounds

Pharma-grade, third-party tested peptides from our preferred vendor. Trusted by the community.

Shop Peptide Partners

Related Research

Practical Guide6 min

The Complete Guide to Peptide Reconstitution: Math, Water, Storage, and Shelf Life

Read research

Practical Guide8 min

Peptide Storage and Stability: Reconstitution Best Practices

Read research

Protocol Breakdown8 min

Peptide Cycling: When to Take Breaks and Why

Read research