Vitamin B12 vs Vitamin D for energy
Short answer: For energy, users rate them about the same: 90% report improvement with Vitamin B12 (103 reports) and 87% with Vitamin D (255 reports).
Vitamin B12 has 376 meta-analyses and 572 randomized trials on PubMed; Vitamin D has 3,251 and 4,560.
Based on 630 reports about Vitamin B12 and 3,058 about Vitamin D. Not medical advice.
| Vitamin B12 Supplement | Vitamin D Supplement | |
|---|---|---|
| Users say it helped | 66%helped202 reports · high confidence | 67%helped1,101 reports · high confidence |
| Verdict | Mostly positive | Mostly positive |
| Research | AResearch: Strong | AResearch: Strong |
| Meta-analyses / RCTs | 376 / 572 | 3,251 / 4,560 |
| Mainly used for | ||
| Mood % reporting improvement | 89% (46) | 88% (393) |
| Energy % reporting improvement | 90% (103) | 87% (255) |
| Sleep % reporting improvement | 42% (12) | 52% (119) |
| Anxiety % reporting improvement | 62% (21) | 64% (90) |
| Immunity % reporting improvement | — | 98% (94) |
| Common side effects | acne, anxiety, jitteriness, weakness | insomnia, anxiety, hypercalcemia, nausea |
| Typical dose reported | 1 ml | 10,000-20,000 IU / daily |
Subgroup analyses indicated that the use of vitamin B12 supplements among vegans contributes to significant improvements in all biomarker concentrations compared to their unsupplemented counterparts. Our findings underscore the need for improved strategies to redress poor vitamin B12 status with appropriate B12 supplementation use among those adhering to vegetarian and vegan diets.
Nutr Bull, 2024 ↗“I supplemented with sublingual b12 and iron and daily electrolytes and I'm feeling much better.”
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 ↗“First thing I noticed was my mood & libido, I have more 'feeling/sensitivity' down there.”
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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