Optimum Nutrition
THE BIOHACKING STANDARD
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RAW Essentials Liquid Glycerol is a single-ingredient hyperhydration/pump product. Glycerol at 1-1.5 g/kg bodyweight has legitimate RCT support as a hyperhydration agent — it draws water into extracellular compartments, increasing plasma volume and cellular hydration for 2-4 hours, with documented benefits for endurance-athlete thermoregulation in heat. For resistance-training 'pump' effects, the mechanism (increased intracellular water in muscle tissue) also has some support at 60-90 minutes pre-workout. The main critique of the category is that WADA restricted glycerol as a plasma-volume expander (banned for competitive athletes in some competitions), and the pump-supplement version of the use case works but is bounded — glycerol adds fullness, not strength. RAW Essentials is a straightforward single-ingredient version; formulation is honest. Score is bounded by the modest evidence tier for the specific use case and overall documentation not at NutraBio level.
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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Every score is set from the published rubric, audit-logged, and rescored whenever new evidence emerges (published trials, updated labels, third-party testing releases). Every vendor is scored on the same criteria — no pay-to-play. See our editorial-independence disclosure for the full policy, including brands with an editorial relationship to this site.

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