Comparison

Periwinkle 650 mg and Periwinkle 450 mg 4:1 Extract

Periwinkle 650 mg (Nature's Answer) lists 1 distinct ingredients and Periwinkle 450 mg 4:1 Extract (TerraVita Premium Collection) 1 (rows of one ingredient counted once); 1 are on both labels. On the site's similarity measure, which compares ingredient lists (1 for the same list, rarer ingredients counting for more; amounts are not part of it), the two formulas score 1.00: the same ingredients, at the amounts in the table below.

Amount per serving (and % of the Daily Value)
Ingredient	Periwinkle 650 mg	Periwinkle 450 mg 4:1 Extract
Common Periwinkle	650 mg	450 mg

Amounts are per serving as DSLD gives them: Periwinkle 650 mg, 1 ml; Periwinkle 450 mg 4:1 Extract, 1 capsule. Current labels entered April 2016 and April 2023. Percentages of the Daily Value from 21 CFR 101.9. Source: NIH ODS Dietary Supplement Label Database.

Each product on its own

Periwinkle 650 mgNature's Answer: every row against all products listing it
Periwinkle 450 mg 4:1 ExtractTerraVita Premium Collection: every row against all products listing it