I don't see any major harm in these...except the herbal products, if they are
not screened for purity well, during manufacture.

If you can afford them, they seem pricey, then by all means.

Another thing with high antioxidant quality is yerba mate tea.
This is twice as potent as green tea. I really like it..it helped me with
night vision tremendously. I use the unsmoked version by EcoTeas.
It also seemed to help with improving bile flow as well.

Vit A retinol does become a problem in high dose continuous use.
Over 25,000 u daily, it may lead to pseudotumor cerebri...the first
symptoms are headache. Women expecting to become pregnant should also watch retinol consumption, since there are studies linking it to birth defects.

But 8000 u for average folks is not that high. If you start with headache, I'd cut back. Many people with poor thyroid function cannot synthesize Vit A retinol from betacarotene, so if one is a hidden low thyroid person, the Vit A in the one product would be actually useful. Formula IV looks pretty nice. I wouldn't count on the magnesium in it, or the potassium as being therapeutic in any way, however.