Author
Xu Jin
Recent research
- BiologyOpen access
Oral collagen bioavailability is frequently inferred from ingredient dose, average molecular weight, or tripeptide enrichment, although none independently identifies the peptides entering human circulation or establishes skin efficacy. Keyora Skin Systems Nutrition - Collagen Tri...
- Health & MedicineOpen access
Background Modern nutritional decision-making is increasingly complicated by the availability of numerous omega-3 preparations, antioxidant formulations, mitochondrial nutrients, botanical extracts, and multi-ingredient dietary supplements. The presence of recognized nutritional...
- Health & MedicineOpen access
Background Reproductive nutrition is frequently organized as though one supplement plan can be initiated before conception and continued through pregnancy and lactation with only minor modification. This model is biologically incomplete. Preconception, pregnancy, and lactation re...
- Health & MedicineOpen access
Background Reduced digestive capacity is frequently described as though it were a single gastrointestinal condition. In practical nutritional care, however, the same complaint of “poor digestion” can represent substantially different biological and behavioral limitations. One per...
- Health & MedicineOpen access
Undenatured type II collagen represents a distinct low-dose nutritional strategy for joint health whose biological rationale differs fundamentally from that of hydrolyzed collagen peptides and conventional structural protein supplementation. Rather than functioning primarily as a...
- Health & MedicineOpen access
Background Middle-aged and older adults are frequently treated as though chronological age defines a single nutritional phenotype. It does not. Two individuals of similar age can differ substantially in cardiovascular burden, lipid metabolism, insulin resistance, renal reserve, h...
- Health & MedicineOpen access
Background Metabolic syndrome is clinically recognized through a cluster of abnormalities that commonly includes central adiposity, elevated triglycerides, reduced HDL cholesterol, elevated blood pressure, and impaired fasting glucose regulation. These clinical criteria provide a...
- Health & MedicineOpen access
Background Cardiovascular disease is commonly recognized when structural abnormalities such as atherosclerotic plaque, arterial narrowing, or clinically overt vascular events become apparent. However, vascular biology can become abnormal considerably earlier. The vascular endothe...
- Health & MedicineOpen access
Abstract Background Nutritional intervention is frequently interpreted through a simplified assumption: if a supplement has been taken consistently, the intended biological effect is presumed to have occurred. This reasoning collapses several biologically distinct stages into one...
- Health & MedicineOpen access
Abstract Background Nutritional intervention is frequently interpreted through a simplified assumption: if a supplement has been taken consistently, the intended biological effect is presumed to have occurred. This reasoning collapses several biologically distinct stages into one...
- Health & MedicineOpen access
Background Phosphatidylcholine and Choline are frequently discussed as though they represented interchangeable nutritional quantities. This simplification becomes particularly problematic when a product declares both phosphatidylcholine and Choline on the same Supplement Facts pa...