There are two considerations when using Vitamin E: [1]Which form of Vitamin E will help to keep the oils in the actual formula from going rancid; [2]Which form of Vitamin E will help improve your actual skin.
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Type 2 Collagen is the form used to improve the joints. Types 1 and 3 collagen are used to aid and improve hair and skin.
Types 1 and 3 are recommended to be taken separately, according to online sources.
If using 'bovine' collagen, be careful about it's source!