PinnyPeptide

Crystagen vs Thymagen

Side-by-side comparison: effects, dosing ranges, side effects, regulatory status, and reconstitution.

Peptide A

Crystagen

Bioregulators

Khavinson short peptide bioregulator targeting thymus / immune cells.

Peptide B

Thymagen

Bioregulators

Khavinson short peptide bioregulator targeting thymic function — Glu-Trp synthetic version.

Typical vial

20 mg

Typical dose

1,000-5,000 mcg

Half-life

Short (minutes); biological effect persists via gene-expression modulation

FDA status

Not FDA approved.

Typical vial

20 mg

Typical dose

1,000-5,000 mcg

Half-life

Short (minutes); biological effect persists via gene-expression modulation

FDA status

Not FDA approved.

Crystagen effects

  • Reported improvement in T-cell numbers and function
  • Restoration of age-related immune decline (Russian observational)
  • Support of thymic function in elderly patients
  • Anti-inflammatory effects
  • Recovery support after severe illness

Thymagen effects

  • Reported improvement in T-cell function and number
  • Support of thymic function in aging populations
  • Recovery support after severe illness
  • Anti-inflammatory effects
  • Modulation of immune gene expression

Crystagen side effects

  • Generally well-tolerated in Russian clinical use
  • Mild injection-site reactions
  • Limited Western safety validation
  • Theoretical: caution in active autoimmune disease (immune modulation)

Thymagen side effects

  • Generally well-tolerated in Russian clinical use
  • Mild injection-site reactions
  • Limited Western safety validation
  • Caution in active autoimmune disease

Crystagen dosing ranges

Immune support

1-5 mg · Once daily (SubQ) or sublingual · 10-20 day cycles, repeated 2-3 times per year

Thymagen dosing ranges

Immune support

1-5 mg · Once daily (SubQ) or sublingual · 10-20 day cycles, repeated 2-3 times per year

Full Crystagen guide → Full Thymagen guide →

Crystagen vs Thymagen — common questions

What is the difference between Crystagen and Thymagen?

Crystagen: Khavinson short peptide bioregulator targeting thymus / immune cells. Typical dose 1,000-5,000 mcg. Thymagen: Khavinson short peptide bioregulator targeting thymic function — Glu-Trp synthetic version. Typical dose 1,000-5,000 mcg. Both fall under the Bioregulators category.

Can you stack Crystagen and Thymagen?

Stacking Crystagen with Thymagen is a protocol-design question best raised with a clinician — it depends on your goal, current bloodwork, and whether both peptides target overlapping mechanisms. Both peptides should be tracked independently with separate injection sites and timing. PinnyPeptide supports multi-peptide stacks with automatic injection site rotation.

Which is dosed more frequently, Crystagen or Thymagen?

Crystagen is typically dosed: Once daily (SubQ) or sublingual for Immune support. Thymagen is typically dosed: Once daily (SubQ) or sublingual for Immune support.

Are Crystagen and Thymagen FDA approved?

Crystagen: Not FDA approved. Thymagen: Not FDA approved.

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