Ingredient topic guides
One page per ingredient class (EPA/DHA, vitamin C, OPC blend, etc.) — research links, quality context, and exclusive products that list it. Product pages link back here so you can compare before checkout.
Wave 1 topics
Omega-3 EPA & DHA
Fish-oil fatty acids shoppers compare on softgel labels — links to Yi Shan exclusive pick.
Vitamin E (tocopherol)
Antioxidant vitamin E as named on exclusive softgel listings.
Vitamin C (ascorbic acid)
Powder-format vitamin C — NIH fact sheet + Isotonix cluster links.
OPC & Pycnogenol blend
Grape seed and pine bark proanthocyanidins on OPC-3 listings.
Multivitamin & essential minerals
Daily powder blends — confirm iron variant on the live Shop page.
Model: ingredient topic ↔ product nutrient angle ↔ SKU cluster hub — not duplicate “EPA page per product.”
Affiliate links: Chengtong Zhihui may earn a commission on purchases through johnny520. Not medical advice.