Supplement
She takes 5g daily as muscles use high quantities of this amino acid for recovery. Supports muscle repair and gut health.
Excellent (95/100) - This product scores highly due to robust evidence for Vitamin D3's benefits at 5,000 IU, matching clinical doses from RCTs like a 2019 meta-analysis (PubMed PMID: 30798465) showing 4,000-10,000 IU optimal for deficiency correction without toxicity in monitored use. Safety is excellent with no FDA issues and low risk profile, though individual testing is advised to avoid excess. Quality excels via NSF certification and ConsumerLab approval, outperforming untested generics. Overall 94 reflects gold-standard for high-dose D3 supplementation.