Can Vitamin C Make You Sleepy?

While vitamin C is generally beneficial, high doses can lead to fatigue and sleepiness. This is a side effect, not a direct sleep-inducing property.

The relationship between vitamin C and sleep is complex. Several sources indicate that adequate vitamin C levels are associated with better sleep. Conversely, excessive intake can cause fatigue.

Vitamin C Deficiency and Fatigue

Low levels of vitamin C can result in scurvy, which causes symptoms like tiredness and muscle weakness. [See: WebMD, Healthdirect]. This fatigue is a consequence of the deficiency, not a direct effect of vitamin C itself.

High Doses and Fatigue

Multiple sources (Mayo Clinic, Yinova Center, Reddit) report that high doses of vitamin C can lead to fatigue, nausea, and diarrhea. This suggests that while moderate vitamin C intake likely supports healthy sleep, exceeding recommended dosages can have the opposite effect, causing tiredness and hindering sleep.

Vitamin C and Sleep Quality

A contrasting viewpoint is presented by some sources (Heritage OKC) suggesting higher vitamin C levels correlate with better sleep. However, this doesn’t imply that taking high doses of vitamin C directly causes sleepiness.

Practical Implications

• Moderate Intake: Sticking to the recommended daily allowance (RDA) of Vitamin C is crucial to avoid negative side effects like fatigue.
• Listen to Your Body: If you experience unusual tiredness after taking vitamin C supplements, consider reducing your dose or consulting a doctor.
• Consult a Healthcare Professional: Always discuss supplementation with a doctor, especially if you have pre-existing health conditions.