Supplement comparison results

Primary ingredients How we evaluate

We evaluate vitamin A content relative to daily recommended amounts and consider differences in efficacy among ingredient forms (palmitate, acetate, beta-carotene, etc.). We also examine how combination ingredient effects on absorption and efficacy.

Price How we evaluate

We calculate unit price based on mg RAE standards to compare price efficiency. We focus on cost-effectiveness based on actual intake amount rather than simple retail price.

Brand How we evaluate

We confirm GMP and international certifications (halal, kosher, etc.) and review manufacturing and quality management systems. We focus on evaluating established brands with long-term consumption safety and reliability.

Quality How we evaluate

We examine formulation stability and absorption rate, whether using fat-soluble capsules, and individual packaging. We evaluate fine quality factors including impurity addition and dosage frequency.

Additional ingredients How we evaluate

We verify scientifically proven functional benefits for eye health and similar effects, review natural extract use, certifications and labeling, and evaluate whether products contribute to health benefits beyond simple supplements.