Vitamin B1 thiamin
Intake model: one reported food record, food date unconfirmed. References: man aged 19–30. How to read the references.
No change indicated. Current estimate is near the RDA with distributed food sources; generic yogurt composition and portion assumptions limit precision.
Linked eating record; usual intake and clinical status unestablished · Reviewed 2026-10-10
Intake confidence: Moderate. Quantity confidence: Limited. Body status: Unassessed.
FDA values describe food labels.
Vitamin B1 thiamin
1.4 mg counted from food.
| Recommended intake | Upper reference | Food label reference |
|---|---|---|
| 1.2 mg (RDA) US National Academies · Food and oral supplements | Not established US National Academies · Food and oral supplements | 1.2 mg (DV) FDA · Adults and children 4+ |
Food contributions and uncertainty
Values are available for 13 of 13 recorded foods. 1 contribution(s) use an incomplete recipe or comparator. Product identity and portion assumptions still limit accuracy.
The saved portion/recipe scenarios span 1.3–1.5 mg. This is a sensitivity range, not a confidence interval; uncertain food composition and unreported foods can fall outside it.
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| Food | Model portion | Contribution | Source basis |
|---|---|---|---|
| Trader Joe's European style organic plain nonfat yogurt | 907 g reported | 0.44 mg | Generic USDA comparator |
| RT RT roast chicken meat and skin | 299 g estimated | 0.19 mg | Generic USDA comparator |
| Banana | 472 g reported | 0.15 mg | Generic USDA comparator |
| Hass avocado | 150 g assumed | 0.1 mg | Generic USDA comparator |
| Navel orange | 140 g assumed | 0.1 mg | Generic USDA comparator |
| Red bell pepper | 150 g assumed | 0.08 mg | Generic USDA comparator |
| Large beefsteak tomato | 182 g assumed | 0.07 mg | Generic USDA comparator |
| Crown Prince Natural Skinless boneless sardines in olive oil | 80 g assumed | 0.06 mg | Generic USDA comparator |
| Trader Joe's Organic basmati rice frozen | 283 g reported | 0.06 mg | Generic USDA comparator |
| Raspberries | 170 g assumed | 0.05 mg | Generic USDA comparator |
| Raw English walnuts | 15 g assumed | 0.05 mg | Generic USDA comparator |
| Trader Joe's Organic raw almonds | 15 g estimated | 0.03 mg | Generic USDA comparator |
Provisional or modeled zeros:
- RT RT chimichurri: Partial recipe estimate.
These are model inputs or current label declarations. They do not prove exact absence in the original package.
Role and intake references
Thiamin, or B1, participates in the metabolism of carbohydrate and other fuels. The adult male RDA is 1.2 mg daily. There is no established UL; that reflects limited evidence for defining a threshold rather than proof that unlimited intake is useful or safe. NIH thiamin.
What the food record establishes
Attention: No change indicated. The available estimate is approximately 1.37 mg, with contributions spread across yogurt, chicken, bananas, avocado, orange and other foods. The largest single estimate, about 0.44 mg from yogurt, uses generic composition and the confirmed whole tub. The record supports plausible coverage, with limited precision and no established usual intake. Because the total is close to the recommendation, modest food or portion changes could affect the comparison.
Thiamin is not a reason to force the beans I disliked. If later records consistently look low, whole grains, a palatable legume portion or another ordinary source could be tested. Enriched and unenriched rice differ, so the exact package should determine whether enrichment is counted. NIH food sources.
Energy metabolism does not mean extra energy
The vitamin helps use fuel; it supplies no calories itself. This mechanistic role is not evidence that a high-dose B1 supplement improves a sufficiently nourished runner's speed, recovery or concentration. No such supplement is reported as taken here. This edition does not attempt a comprehensive review of therapeutic thiamin derivatives.
Severe undernutrition, alcohol dependence and absorption problems can change the clinical question. Those conditions have not been established by this food record. NIH risk groups. For my current choices, confirming portions and following the repeatable eating pattern are more useful than adding a B-complex pill because its label mentions energy.