Optimum Nutrition
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Akavital is a Turkish-market supplement brand. The formula stacks five things into a single capsule (acacia gum for prebiotic fiber, resveratrol for antioxidant, vitamin C, D3, K2) without publicly-disclosed per-ingredient doses. Each individual ingredient has some evidence at specific doses (resveratrol at 250-500mg for cardiometabolic markers, D3 at 1000-4000 IU, K2 at 90-180mcg MK-7, vitamin C at 200-1000mg for immune, acacia at 5-10g for prebiotic effect on gut microbiome). The problem is that 5-10g of acacia will not fit into a capsule; if the acacia is at 100-500mg per serving (capsule-realistic), it is sub-therapeutic. Multi-ingredient stacks that do not disclose per-ingredient doses risk hiding sub-therapeutic dosing of the marquee ingredient. Not on auto-fail (doses might be borderline defensible, we cannot tell), but transparency and formulation gaps push into Rejected. Turkish-market brand.
The Vyvata score's Evidence dimension measures the quality of published RCT support for a product's active ingredients at the label dose. Our source hierarchy: double-blind RCTs in MEDLINE-indexed journals > single-blind RCTs > open-label trials > observational studies > mechanism papers > N=1 case studies (anecdotes). Predatory journals and manufacturer-authored studies without independent replication are weighted down.
Product-specific evidence citations for this item are embedded in the analysis text on the "Analysis" tab. For the full framework and evidence hierarchy, see the methodology page.
FAQ data has not been generated for this product yet. See the site FAQ for general questions.
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