Similarities:
- Both are chains formed by amino acids.
- The small molecules of both can serve as precursors to hormones.
Differences:
- Cancer Interaction: Animal-based peptides are not utilized by cancer cells, making them the optimal nutritional supplement for cancer patients. Plant-based peptides (single-strand peptides) are easily utilized by cancer cells and are considered “prohibited foods” for those with cancer.
- Molecular Structure: Animal peptides possess a triple-helix 3D structure, whereas plant peptides have a single-chain planar (2D) structure.
- Skin Utilization: Animal peptides are precursors to dermal fibroblasts and elastic fibers. Plant peptides must be restructured by the body before they can be used by the skin, resulting in significantly lower efficacy.
- Amino Acid Profile: Animal peptides contain all 20 types of amino acids, while plant peptides typically contain only 17–18 types.
- Systemic Repair: Animal peptides can repair skin, internal organs, blood vessels, knee cartilage, and connective tissues. They are essential nutrients for immunoglobulins, cellular DNA, and the endocrine system.
- Aging and Synthesis: The body’s ability to synthesize peptides from amino acids and bond them into collagen changes with age. Collagen absorption increases from age 0 to 20, decreases from 25 to 45, and the ability to synthesize peptides from amino acids effectively ceases after age 45. Consequently, the World Health Organization (WHO) classifies amino acids as “restricted foods” for the elderly, with a recommended daily limit of 200mg (0.2g).
- Common Misconceptions: Common plant-based peptide products on the market include Soy Isoflavones, CoQ10, and Red Yeast Rice. In cosmetics, Kinetin is a primary representative. It is important to note: Plants do not contain collagen. Those spreading misleading information should correct their claims.