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L-Citrulline and Beet Root Supplement Improves Nighttime Erections

Judson Brandeis*, Elliot Justin, Aidan J Tu

Objective: This study evaluated the impact of a nitric oxide-boosting dietary supplement on nighttime erectile function using wearable sensor technology. 

Methods: Ten men (mean age 52, mean SHIM score 18) participated in a crossover study. Participants wore the FirmTech TechRing, a validated device that measures erectile firmness and duration, over four nights. Following a two-day washout period without ejaculation or (ED-Erectile Dysfunction) ED-related medications/substances, participants recorded erectile activity over two baseline nights, then ingested two tablets of a nitric oxide-boosting supplement (containing L-Citrulline, Red beet root extract, Panax ginseng, and Muira puama) one hour before sleep for two subsequent nights. Erectile quality was quantified as the area under the curve per hour of sleep (AUC/hr). 

Results: AUC/hr significantly increased from a mean of 79.8 (baseline) to 117.9 (supplement nights) with a mean difference of 38.04 (95% CI: -56.75 to -19.33, p=0.0004). The number of nightly erections showed no significant change (4.05 vs. 4.45, p=0.42). No adverse effects were reported. 

Conclusion: The supplement improved the intensity and duration, but not the frequency, of nighttime erections without side effects. These findings suggest potential benefits for erectile health and warrant further investigation, particularly in combination with other ED treatments.