Caffeine vs Vitamin D for energy
Short answer: For energy, more users report improvement with Vitamin D — 87% of 212 reports, versus 78% of 535 for Caffeine.
Caffeine has 680 meta-analyses and 2,072 randomized trials on PubMed; Vitamin D has 3,251 and 4,560.
Based on 1,592 reports about Caffeine and 2,294 about Vitamin D. Not medical advice.
| Caffeine Substance | Vitamin D Supplement | |
|---|---|---|
| User score | 49 | 48 |
| Verdict | Mixed | Mostly positive |
| Positive of reports that state an outcome | 42% | 65% |
| Reports | 1,592 | 2,294 |
| Research | AResearch: Strong | AResearch: Strong |
| Meta-analyses / RCTs | 680 / 2,072 | 3,251 / 4,560 |
| Mainly used for | ||
| Weight loss % reporting improvement | 90% (10) | 62% (8) |
| Appetite % reporting improvement | 67% (6) | 67% (3) |
| Focus % reporting improvement | 79% (365) | 82% (55) |
| Energy % reporting improvement | 78% (535) | 87% (212) |
| Sleep % reporting improvement | 14% (110) | 50% (105) |
| Anxiety % reporting improvement | 16% (208) | 65% (82) |
| Mood % reporting improvement | 73% (108) | 88% (307) |
| Memory % reporting improvement | 53% (19) | 83% (12) |
| Performance % reporting improvement | 91% (35) | 100% (23) |
| Recovery % reporting improvement | — | 100% (10) |
| Pain & inflammation % reporting improvement | 40% (5) | 73% (30) |
| Digestion % reporting improvement | 29% (7) | 50% (14) |
| Libido % reporting improvement | 0% (2) | 80% (45) |
| Hormones % reporting improvement | 25% (4) | 87% (55) |
| Blood sugar % reporting improvement | — | 100% (2) |
| Heart & lipids % reporting improvement | 8% (12) | 60% (15) |
| Skin & hair % reporting improvement | — | 89% (28) |
| Immunity % reporting improvement | — | 99% (73) |
| Longevity % reporting improvement | — | 78% (9) |
| Common side effects | jitteriness, anxiety, insomnia, headache | insomnia, anxiety, fatigue, hypercalcemia |
| Typical dose reported | 100-150 mg / daily | daily |
To avoid reductions in total sleep time, coffee (107 mg per 250 mL) should be consumed at least 8.8 h prior to bedtime and a standard serve of pre-workout supplement (217.5 mg) should be consumed at least 13.2 h prior to bedtime. The results of the present study provide evidence-based guidance for the appropriate consumption of caffeine to mitigate the deleterious effects on sleep.
Sleep Med Rev, 2023 ↗“For me (210lbs), 100-150mg. IMO above 200mg js too much.”
These results indicate that the prevalence of vitamin D deficiency was more elevated in obese subjects. The vitamin D deficiency was associated with obesity irrespective of age, latitude, cut-offs to define vitamin D deficiency and the Human Development Index of the study location.
Obes Rev, 2015 ↗“I micro-dose coffee, vitamin d, and lemon juice every morning”
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Percentages come from first-hand user reports and are not clinical outcomes. Talk to a doctor before starting, stopping or combining anything. How we rate