standardized extract question

[johnyq]

When a certain herbal extract is standardized around one active, the bottle may read like

Resveratrol 50% 500mg

or

Icariin (50%) 200mg



does that mean in those examples, the resveratrol content is 250mg and icariin is 100mg ? The rest of the weight being other parts of the source of the active (say maybe grape skins or HGW in those examples).





if that is correct, I get more confused when looking at something like eGCG

from NOW

Green Tea Extract (Camellia sinensis) (Leaf) 400mg **
Standardized Extract) (Contains 4 mg of Caffeine)

min. 98% Total Polyphenols, 80% Total Catechins, and 50% EGCg



What do those percentages mean, clearly it doesn't have 228% of actives in it...

 

[dsade]

Correct.

For Green Tea, it is standardized for 98% Total Polyphenols, 80% of these polyphenols are Catechins, and 50% of the Catechins are EGCG.

 

[johnyq]

Thanks dsade! Makes sense.


poison also gave me an explanation on an unrelated forum.

 

[dsade]

Thanks dsade! Makes sense.


poison also gave me an explanation on an unrelated forum.

Poison definitely knows his stuff.