Compare Peptides
Select any two compounds for a side-by-side comparison of mechanism, uses, risks, and FDA regulatory status.
Popular comparisons
A recombinant fragment of parathyroid hormone (amino acids 1-34) FDA-approved for osteoporosis. The first anabolic (bone-building) agent approved for osteoporosis, as opposed to anti-resorptive drugs that only slow bone loss.
Bioactive peptide fragments derived from hydrolyzed collagen protein. The most commercially successful peptide supplement category, with a global market exceeding $5 billion. Available in Types I, II, III, and marine-sourced variants.
Intermittent exposure to PTH(1-34) paradoxically stimulates osteoblast activity more than osteoclast activity, resulting in net bone formation. This is opposite to the bone-resorbing effect of continuously elevated PTH in hyperparathyroidism.
Provides bioavailable proline, glycine, and hydroxyproline — amino acids critical for collagen synthesis. Dipeptides (Pro-Hyp, Hyp-Gly) are absorbed intact and stimulate fibroblast activity, promoting endogenous collagen production in skin, joints, and connective tissue.
- Severe osteoporosis
- Fracture risk reduction
- Glucocorticoid-induced osteoporosis
- Bone healing acceleration
- Skin elasticity and hydration
- Joint health and mobility
- Hair and nail strength
- Gut lining support
- Bone density support
- Osteosarcoma risk (boxed warning — based on rat studies at high doses)
- Hypercalcemia
- Orthostatic hypotension
- Leg cramps
- Nausea
- Limited to 2 years of use
- Generally well-tolerated
- Mild GI discomfort in some users
- Allergic reactions (rare, especially marine-sourced)
- Heavy metal contamination risk in low-quality products
- Efficacy debated — some studies industry-funded
FDA-approved as Forteo (2002) for osteoporosis in postmenopausal women and men at high fracture risk. Limited to 2 years of treatment due to theoretical osteosarcoma risk. Biosimilar (Tymlos/abaloparatide is a related but distinct peptide).
Classified as a dietary supplement under DSHEA. Not FDA-approved for any medical indication. Widely available OTC without prescription. No regulatory restrictions.
This comparison is for educational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional before starting any peptide therapy.