What "we do": As a reference, please also do your research as to your needs with your veterinarian and other experienced poison frog breeders. This routine is based on years of experience and consultation with other breeders and leading researchers.
Daily: Repashy Calcium Plus for daily feedings:
Weekly: Repashy SuperVite mixed with Repashy Calcium Plus
Repashy Superpig mixed with Repashy Calcium Plus.
Twice a month:
Repashy Vitamin A Plus mixed with Repashy Calcium Plus
"Too much of a good thing":
As in people and other animals, it is possible to provide "too much" vitamins and can poison your frogs. Follow vitamin labeling and do not exceed recommended supplementation and frequency. Vitamin A is one notable especially dangerous if provided too much too often.
Beta Carotene converts to vitamin A as needed in reptiles and water soluble, however research shows that amphibians cannot metabolize needed vitamin A from beta carotene and should not be used. Thus avoid "reptile" vitamins. Amphibian vitamins use Retinol as their form of vitamin A. This is fat soluble and will accumulate in the body and thus limiting additional vitamin A supplementation is recommended.
Multi vitamins: Multi-vitamin stand alone supplements are typically a large dose/ concentration of vitamins and minerals intended for periodic use and thus should not be used daily.
Expiration:
Note, vitamins interact with air and moisture and degrade at higher temperatures. Prolonged exposure to air and moisture will degrade vitamins and their potency. Thus it is recommended to refrigerate supplements and to replace supplements every 6 months. Older vitamins can be added to enrich your fruit fly culture media versus simply throwing away. Note as well the expiration date of your vitamins. Discard old supplements.