Size: 90 Softgel Capsules
Progressive Labs Vitamin A Fish Liver Oil delivers preformed vitamin A (retinol) sourced from fish liver oil in softgel form, supporting vision, immune function, and skin integrity. This fat-soluble nutrient is well-suited for individuals seeking a traditional, whole-source retinol supplement rather than a synthetic isolate.
Why It's Worth Considering: Fish liver oil provides retinol in its naturally occurring lipid matrix, which may support absorption compared to dry tablet forms. Progressive Labs is a long-standing practitioner-oriented brand with a straightforward, low-excipient formulation approach.
Preformed vitamin A (retinol/retinyl palmitate) is immediately active — your body uses it directly. Beta-carotene is a provitamin A that must be converted to retinol. Conversion is inefficient (6:1 ratio) and varies by genetics — up to 45% of people are poor converters. For therapeutic use, preformed retinol or retinyl palmitate is preferred.
The tolerable upper limit is 10,000 IU/day of preformed vitamin A for adults. Most supplements provide 3,000-5,000 IU. Cod liver oil provides natural vitamin A + D together. Beta-carotene does not have a toxic upper limit (excess is stored harmlessly). Pregnant women should not exceed 5,000 IU preformed A.
Yes — vitamin A is fat-soluble and accumulates in the liver. Chronic intake above 25,000 IU/day can cause toxicity (headache, nausea, liver damage, bone loss). This is only a concern with preformed vitamin A supplements, not beta-carotene or food sources. Stay within recommended doses and avoid combining multiple A-containing supplements.
Apotheca is analyzing ingredient interactions, stacking compatibility, and timing recommendations for Progressive Labs - Vitamin A Fish Liver Oil. This data will be available soon.
† These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
