Crystagen dosing & administration
Immunogeroprotective tripeptide bioregulator (Glu-Asp-Pro) that optimally stimulates thymic epithelial cell proliferation at 200 ng/mL, suppresses thymocyte apoptosis through p53 downregulation and Ki-67 upregulation, and contributed to a 4.1-fold mortality reduction in a 266-person 6-8 year clinical study when combined with complementary pineal peptides
Written by Michael Carroll — Owner, Director of Research · Reviewed by the Peptide Initiative Research Team · Editorial standards
Dosing
How much do I take?
Subcutaneous: A small injection into the fatty layer just under the skin — the same way insulin is given.
Bioavailability High — most of the dose reaches your bloodstream, just more gradually than an IV.
200-400 mcg
Frequency
Once daily
Duration
10-20 days per course, repeated every 4-6 months
For the synthetic peptide form, a dose commonly used in research practice given as an injection under the skin. [6]
Timing
Best time to take
Administer Crystagen at the same time each day (or on the same day each week for weekly injections). Many users prefer morning or evening administration. Pick a time you'll remember consistently.
With food?
Crystagen injections can be given regardless of meal timing. However, if GI effects occur, administering on an empty stomach or with a light meal may help reduce discomfort.
If stacking
Crystagen should be used as directed by your healthcare provider. If combining with other medications or supplements, discuss potential interactions with your provider. Avoid combining with compounds that have overlapping mechanisms unless specifically guided by a medical professional.
Adjusting your dose
Increase if
- You've tolerated the current dose for the recommended period without significant side effects
- Therapeutic goals haven't been met at the current dose level
- Your healthcare provider recommends dose escalation based on your response
- Lab work or clinical assessments support a higher dose
Decrease if
- Side effects are bothersome or impacting daily life despite management strategies
- You experience any signs of an adverse reaction
- Lab results indicate the need for dose reduction
- Your healthcare provider recommends a lower dose based on your response
Signs of right dose
- Therapeutic goals being met with minimal side effects
- Stable and consistent response to treatment
- Lab values or clinical markers trending in the right direction
- Good tolerance with manageable or absent side effects
Administration
How do I use it?
Reconstitution
What you need
Injection
Route
Subcutaneous injection (into the fatty tissue just under the skin)—allows for consistent absorption and can be self-administered at home after proper training
Best sites
Storage
Before reconstitution
Store Crystagen in the refrigerator at 36-46°F (2-8°C) in its original packaging. Protect from light and moisture. Do not freeze. Check the expiration date before use. Some formulations may be stored at room temperature for limited periods—check your specific product labeling.
After reconstitution
Once reconstituted, Crystagen should be kept refrigerated at 36-46°F (2-8°C) and used within the timeframe specified on your product labeling (typically 14-28 days). Label the vial with the reconstitution date. Do not use if the solution appears cloudy, discolored, or contains particles.
Signs of degradation — discard the vial
Sample daily schedule
As prescribed (once daily)
As prescribed by your healthcare provider injection
Site: Subcutaneous injection—rotate sites if applicable
Maintain a consistent schedule for optimal results with Crystagen. Set reminders if needed. If you miss a dose, follow your healthcare provider's instructions—do not double up on doses to compensate.
Safety
Is it safe?
Side effects
Commonly reported: Injection site reaction, Mild fatigue, Mild headache, Minor digestive changes
Less common: Flu-like symptoms
Stop and seek help if
- Severe or worsening side effects that don't improve with dose adjustment or supportive care
- Signs of an allergic reaction—rash, hives, swelling, or difficulty breathing
- Your healthcare provider recommends discontinuation based on your clinical response
- Development of any new medical condition that may be contraindicated with Crystagen
- Pregnancy or planning to become pregnant (unless specifically approved for use during pregnancy)
- Abnormal lab results or clinical markers that suggest adverse effects
Crystagen should only be started, adjusted, or discontinued under medical supervision. This information is for educational purposes only and does not replace professional medical advice. Never stop a prescribed treatment without consulting your healthcare provider first, as abrupt discontinuation may have consequences.
Flagged pairings
- Immunosuppressive medications (cyclosporine, tacrolimus, mycophenolate) without medical supervision — immunostimulatory effects may counteract immunosuppression — Use with caution—discuss with your healthcare provider.
- High-dose corticosteroids — may interfere with Crystagen's T-cell activation mechanisms — Use with caution—discuss with your healthcare provider.
- Other potent immunostimulants at high doses without monitoring — risk of immune overactivation — Use with caution—discuss with your healthcare provider.
Published research
What the studies show
Khavinson VKh, Morozov VG · 2003
Thymic and pineal peptides (Thymalin and Epithalamin) reduced mortality in elderly patients by 2-4 fold over 6-8 years while improving cardiovascular, immune, and metabolic function.
Anisimov VN, Khavinson VK, Mikhalski AI · 2001
Research (2001) on crystagen contributes important scientific knowledge about its biological and pharmacological properties.
Anisimov VN, Khavinson VK, Morozov VG · 2000
Research (2000) on crystagen contributes important scientific knowledge about its biological and pharmacological properties.
Khavinson VK, Kuznik BI, Trofimova SV · 2021
Clinical evidence (2021) supports the therapeutic use of crystagen in medical treatment protocols.
Lin'kova NS, Polyakova VO, Trofimov AV · 2011
Research (2011) on crystagen contributes important scientific knowledge about its biological and pharmacological properties.
2024
Synthetic Cytogen capsules contain 10 mg of active peptides (200-400 mcg active peptide per dose). Commonly used in practice at 1-2 capsules once or twice daily with meals; course 10-30 days, repeated every 4-6 months. Not approved as a medicine in Western jurisdictions.
Head to head
Crystagen compared
Want the full picture?
The complete Crystagen research profile: mechanism of action, clinical studies, effectiveness timeline, and FAQ.