Clinical Trials of Dietary Supplements: R
- Radish (5)
- Raspberry (54)
- Rauwolfia (1)
- Red Cinchona (55)
- Red Clover (10)
- Red Yeast (41)
- Reishi (17)
- Retinol (691)
- Riboflavin (232)
- Rooibos (1)
- Rose Hips (10)
- Rosemary (31)
- Rue (12)
- Rutin (15)
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