SOMA Folinic Acid Capsules (25mg)
Folinic acid (leucovorin, 5-formyl-THF) in oral capsule format, 25mg per capsule. Active folate coenzyme for one-carbon metabolism, DNA synthesis, and methylation cycle research. COA included.
Oral Research Peptides · No Reconstitution · Pre-Dosed
Research Peptides in
Oral Capsule Form
No bacteriostatic water. No syringes. No measurement error. Pre-dosed oral capsules for research protocols where injectable format is not required. HPLC-verified >98% purity. Certificate of Analysis on every order. Ships to USA, Australia, Canada, UK and globally.
✓ No Reconstitution ✓ Pre-Measured Dose ✓ HPLC >98% ✓ COA Every Order
HPLC + MS Verified >98%
Third-Party CoA Every Order
Shelf-Stable · No Refrigeration
Ships to AU · CA · UK · US + Globally
Why Oral Capsule Format?
For researchers where oral administration is the study requirement — or where injectable logistics are a constraint.
No Reconstitution Required
No bacteriostatic water. No syringe. No vial piercing. Capsules are shelf-ready and eliminate the reconstitution step entirely — simplifying research logistics and reducing handling variables.
Pre-Measured Dose Per Capsule
Each capsule is filled to a precise milligram weight and verified by mass. Eliminates volumetric measurement error introduced by manual reconstitution and syringe drawing — improving dose consistency across experimental subjects.
Shelf-Stable Storage
Most capsule compounds are stable at room temperature for 12–24 months when stored away from heat and light. No cold-chain requirement — unlike lyophilized vials, which require refrigeration after reconstitution to preserve peptide integrity.
Portable for Field Research
Discreet, compact, and travel-compatible. No refrigeration or reconstitution equipment needed in the field. Useful for research protocols conducted outside of a fixed laboratory environment.
Peptide Capsule Catalog
HPLC-verified >98% purity · Certificate of Analysis on every order · For Research Use Only
- SOMA
SOMA Orforglipron Capsules
Orforglipron oral non-peptide GLP-1 receptor agonist in capsule format. Small-molecule metabolic signaling research compound with Phase III ATTAIN-DM weight loss data. COA included.
SOMA 1-MNA Capsules (60mg)
1-MNA (1-Methylnicotinamide) in oral capsule format, 60mg per capsule. NAD+ metabolite studied as a myokine, anti-inflammatory agent, and SIRT1 stabiliser. COA included.
SOMA O-304 Capsules (150mg)
O-304 (ATX-304, OS-01) pan-AMPK activator in oral capsule format, 150mg per capsule. Studied for whole-body metabolic activation and insulin sensitisation. COA included.
SOMA Tirzepatide Capsules (10mg)
Tirzepatide GIP/GLP-1 dual agonist in oral capsule format, 10mg per capsule. FDA-approved Mounjaro/Zepbound mechanism. Studied for glucose regulation and metabolic research. COA included.
AXON DSIP Capsules (5mg)
DSIP (Delta Sleep-Inducing Peptide) in oral capsule format, 5mg per capsule. Studied for sleep architecture modulation, HPA axis normalisation, and stress peptide biology. COA included.
SOMA Retatrutide Capsules (10mg)
Retatrutide GIP/GLP-1/glucagon triple agonist in oral capsule format, 10mg per capsule. Next-generation metabolic research peptide with 24.2% Phase II weight loss data. COA included.
SOMA Thymosin Alpha-1 Capsules (10mg)
Thymosin Alpha-1 (TA1) immune-regulatory peptide in oral capsule format, 10mg per capsule. Approved as Zadaxin in 35+ countries. Studied for T-cell maturation and innate immunity. COA included.
SOMA KPV Capsules (4mg)
KPV (Lys-Pro-Val) alpha-MSH tripeptide in oral capsule format, 4mg per capsule. Studied for MC1R-mediated anti-inflammatory signaling and intestinal permeability. COA included.
SOMA MOTS-c Capsules (10mg)
MOTS-c mitochondria-derived peptide in oral capsule format, 10mg per capsule. Studied for AMPK activation, glucose homeostasis, and exercise-mimetic metabolic effects. COA included.
SOMA SS-31 Capsules (20mg)
SS-31 (Elamipretide) mitochondria-targeted tetrapeptide in oral capsule format, 20mg per capsule. Phase II/III clinical data for cardioprotection and mitochondrial bioenergetics. COA included.
SOMA GHK-Cu Capsules (50mg)
GHK-Cu (Glycyl-L-Histidyl-L-Lysine Copper) in oral capsule format, 50mg per capsule. Studied for collagen synthesis, wound healing, and systemic tissue remodelling. COA included.
SOMA Semax Capsules (10mg)
Semax ACTH-derived nootropic neuropeptide in oral capsule format, 10mg per capsule. Studied for BDNF upregulation, cognitive enhancement, and stroke recovery models. COA included.
SOMA Selank Capsules (10mg)
Selank heptapeptide in oral capsule format, 10mg per capsule. Russian-registered anxiolytic neuropeptide studied for GABAergic modulation and HPA axis regulation. COA included.
SOMA Epithalon Capsules (10mg)
Epithalon (Epitalon) tetrapeptide in oral capsule format, 10mg per capsule. Studied for telomerase activation, cellular longevity, and pineal regulation. COA included.
SOMA NAD+ Capsules (500mg)
NAD+ (Nicotinamide Adenine Dinucleotide) in oral capsule format, 500mg per capsule. Research-grade coenzyme for longevity, mitochondrial function, and sirtuin activation studies. COA included.
SOMA Dihexa Capsules (10mg)
Dihexa potent synaptogenic AT4/IRAP inhibitor in oral capsule format, 10mg per capsule. Researched for HGF/MET pathway and cognitive function models. COA included.
SOMA 5-Amino-1MQ Capsules (50mg)
5-Amino-1MQ NNMT inhibitor in oral capsule format, 50mg per capsule. Studied for adipocyte metabolism, NAD+ pathway activation, and fat cell differentiation. COA included.
SOMA SLU-PP-332 Capsules (200mg)
SLU-PP-332 ERRα/γ agonist in oral capsule format, 200mg per capsule. Exercise-mimetic compound studied for endurance and metabolic adaptation. COA included.
SOMA BPC-157 Capsules (500mcg)
BPC-157 (Body Protection Compound) in oral capsule format, 500mcg per capsule. Studied for GI integrity, tissue signaling, and systemic repair pathways. COA included.
AXON Dihexa
Dihexa is a small-molecule angiotensin IV analogue and AT4/IRAP inhibitor. Studied for synaptogenic activity and cognitive enhancement, it is reported to be approximately 10 million times more potent than BDNF in facilitating new synapse formation.
Compound Research Notes by Area
Brief context on the primary research applications for each capsule compound.
Cognitive & Nootropic
- Dihexa
- HGF potentiator that facilitates synaptogenesis. Studied in rodent models for cognitive enhancement; crosses the blood-brain barrier in preclinical data.
- Semax
- ACTH-derived peptide analogue. Upregulates BDNF and VEGF in neural tissue models. Phase II Russian clinical data on ischemia and cognitive function.
- Selank
- Tuftsin analogue with anxiolytic and nootropic activity. Modulates IL-6 and serotonergic pathways in preclinical anxiety models.
- 5-Amino-1MQ
- NNMT inhibitor. Studied for inhibition of fat cell differentiation and adipogenesis. Increases NAD+ and SAM levels in adipocyte cell culture models.
- 1-MNA
- 1-Methylnicotinamide. Anti-thrombotic and anti-inflammatory research via prostacyclin and COX-2 pathway modulation. Polish clinical data on vascular biology.
Anti-Aging & Longevity
- Epithalon
- Tetrapeptide studied for telomerase activation and telomere elongation in human somatic cells. Anti-aging biomarker research by Khavinson et al.
- NAD+
- Sirtuin pathway activator. Studied for mitochondrial biogenesis, DNA repair, and cellular energy metabolism. Oral precursor and direct NAD+ supplementation research.
- GHK-Cu
- Copper tripeptide. Collagen synthesis, wound healing, and anti-fibrotic activity. Also studied for neuroprotection and gene expression regulation (over 4,000 genes affected).
- Folinic Acid
- Bioactive folate. Studied in methylation cycle support, one-carbon metabolism, and as a cofactor in neurotransmitter synthesis — including serotonin and dopamine pathways.
Body Composition & Metabolic
- Retatrutide
- Triple GIP/GLP-1/glucagon receptor agonist. Phase II NEJM data showing up to 24.2% weight reduction at 48 weeks. Investigational — not approved for therapeutic use.
- Tirzepatide
- GIP/GLP-1 dual agonist. The therapeutic molecule behind Mounjaro/Zepbound. Studied in preclinical models for metabolic, glycaemic, and cardiovascular endpoints.
- Orforglipron
- Non-peptide oral GLP-1 receptor agonist. Phase III data from Eli Lilly demonstrating significant weight reduction without injectable format requirement.
- O-304
- Pan-AMPK activator. Studied for insulin sensitization, NASH, and type 2 diabetes research models. Phase I/II data from Betagenon AB.
- SLU-PP-332
- ERRα/β/γ pan-agonist. Studied as an exercise mimetic — induces mitochondrial biogenesis and oxidative metabolism in skeletal muscle without physical activity. Burris lab, 2023.
Immune & Anti-Inflammatory
- KPV
- C-terminal tripeptide of alpha-MSH. Studied for intestinal inflammation (IBD models), anti-inflammatory signalling via NF-κB inhibition, and wound healing.
- Thymosin Alpha-1
- Thymic immunomodulatory peptide. Studied for T-cell proliferation, NK cell activity, and immune reconstitution in immunocompromised models. Approved as Zadaxin in some jurisdictions.
- MOTS-c
- Mitochondria-derived peptide. Activates AMPK and regulates glucose metabolism. Studied in aging models for insulin sensitivity and metabolic homeostasis.
- SS-31 (Elamipretide)
- Mitochondria-targeted peptide. Cardioprotective research via reduction of mitochondrial ROS. Phase I/II clinical data in heart failure and rare mitochondrial myopathies.
Recovery & Tissue Repair
- BPC-157
- Synthetic pentadecapeptide derived from human gastric juice. Studied for GI healing, musculoskeletal repair, and neuroprotection. Oral bioavailability demonstrated in rodent GI models.
- DSIP
- Delta sleep-inducing peptide. Neuromodulatory activity studied in sleep architecture, stress axis regulation, and opioid withdrawal research models.
Frequently Asked Questions
Are oral peptides as effective as injectable peptides?
Effectiveness depends on the compound and the research model. Most peptides are degraded in the gastrointestinal tract before reaching systemic circulation — this is why injectable formats remain the gold standard for peptides like BPC-157, TB-500, and GHK-Cu. However, certain peptides and small molecules have demonstrated oral bioavailability in preclinical and clinical research. Compounds like Orforglipron, O-304, and Tirzepatide were specifically designed for oral delivery. For in vitro research, the delivery format is less relevant than compound purity and identity. All Rainbow Peptide capsule compounds are supplied For Research Use Only.
What is the shelf life of peptide capsules?
Shelf life varies by compound. Most encapsulated peptides and small molecules are stable at room temperature for 12–24 months when stored in cool, dry conditions away from direct light. Unlike lyophilized vials, capsules do not require reconstitution and are generally less susceptible to moisture degradation when properly sealed. Each product listing includes stability data from the Certificate of Analysis.
Do peptide capsules need to be refrigerated?
Most Rainbow Peptide capsule compounds do not require refrigeration and are shelf-stable at room temperature. Compounds that are sensitive to heat or light will be noted in the product specifications. This is one of the advantages of the oral capsule format over lyophilized injectable vials, which often require cold-chain shipping and refrigerated storage.
Are these peptide capsules for human use?
No. All peptide capsules sold by Rainbow Peptide are strictly For Research Use Only (RUO). They are not intended for human consumption, are not approved by the FDA or any regulatory agency for therapeutic use, and are not intended to diagnose, treat, cure, or prevent any disease or medical condition. Purchase is restricted to qualified researchers and laboratory professionals.
How do I know the capsule dose is accurate?
Every batch of Rainbow Peptide capsules is independently verified by an accredited third-party laboratory. The Certificate of Analysis (COA) included with every order confirms HPLC purity (>98%), mass spectrometry identity, and capsule fill weight accuracy. Lot numbers on your order are traceable to the specific COA for that batch.
What is the difference between peptide capsules and vials?
Lyophilized vials contain freeze-dried peptide powder that must be reconstituted with bacteriostatic water before use. Capsules are pre-dosed, ready-to-use, and require no reconstitution equipment. Vials are the standard format for most injectable peptides. Capsules are preferred for compounds with demonstrated oral bioavailability or for research designs that require oral administration models. Many compounds in the Rainbow Peptide catalog are available in both formats — product pages include cross-links to alternate formats.
Related Research Resources
Injectable Peptide Vials
Browse the full range of lyophilized vials — BPC-157, TB-500, GHK-Cu, Retatrutide and 40+ more.
Testing & COA Process
How we test every batch — HPLC, mass spectrometry, endotoxin, and what's on your COA.
How to Reconstitute Peptides
For researchers using injectable vials — step-by-step reconstitution guide with bacteriostatic water.
Oral Peptides vs Injectable Guide
Which compounds have oral bioavailability data and when capsule format is appropriate for your research.
Best Oral Research Peptides 2026
Top compounds by research category — cognitive, longevity, metabolic, immune. Ranked by evidence.
Cognitive & Nootropic Peptides
Semax, Selank, Dihexa — full AXON sub-line including injectable vial formats.
Also Researching Injectables or SARMs?
Rainbow Peptide carries 40+ injectable vials and 9 SARMs alongside the oral capsule line — all HPLC-verified at >98% purity.