● Food Intelligence · Breakfast
Across 129 single-item raisin bran logs, Signos members averaged a +54.1 mg/dL glucose peak — with 82.2% of responses topping +30 mg/dL. That's notably higher than oatmeal (+38.9 mg/dL) or generic cereal (+38.3 mg/dL). Add ≥15g of protein and the peak drops ~8.6%; load the bowl with ≥60g of carbs and it climbs another 23.5%.
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Yes — across 129 logged meals where members ate raisin bran alone, the average glucose peak was +54.1 mg/dL, with 82.2% of responses exceeding the +30 mg/dL threshold. In our single-item cohort of 129 raisin bran logs from 99 unique members, the median peak was +55 mg/dL and 78.3% of responses fell in the high-spike tier — above both oatmeal (+38.9 mg/dL) and generic cereal (+38.3 mg/dL) in the same breakfast comparison set. The raisins are the dominant driver: their concentrated sugars add fast-digesting fructose and glucose on top of the bran starch load. Three levers partially offset the response: a protein pairing (≥15g) cut the broader-cohort mean by ~8.6% across 312 matched meals (p<0.01), a fat pairing (≥15g) trimmed it ~7.7% across 139 matched meals (p<0.05), and high carb load (≥60g) pushed it 23.5% higher across 409 matched meals (p<0.01). These are observational findings, not causal.
Some members spike +43.8 mg/dL. Others spike +56.1. The only way to know how you'll spike is to measure with a Signos CGM.
Across 129 logged meals where members ate raisin bran alone, the average glucose peak hit +54.1 mg/dL — with 78.3% of responses in the high-spike tier and only 7.0% in the low-spike range. Two fuel sources drive that response simultaneously: the bran-flake starch (roughly 35–40g net carbs per cup) and the raisins' concentrated simple sugars (~18–20g added sugar per cup). The bran supplies some viscous fiber that slows starch digestion marginally, but the raisins' fast-release fructose and glucose override that buffer for most members. In the broader cohort, a protein pairing (≥15g) cut peaks by ~8.6% across 312 matched meals (p<0.01) and a fat pairing (≥15g) trimmed them ~7.7% across 139 matched meals (p<0.05) — meaningful secondary brakes, but neither erases the underlying carbohydrate load. These effects are observational from matched-pair analysis, not controlled trials.
This page draws on Signos production CGM data logged between Mar 2025 and Apr 2026, covering 884 meals containing raisin bran across 454 unique members (broader cohort), with a single-item sub-cohort of 129 meals (99 unique members) where raisin bran was logged without other foods. The single-item sub-cohort is the page primary; its mean peak of +54.1 mg/dL and 82.2% above-30 rate are the headline figures. Statistical comparisons use Welch's t-test on matched pairs; modifier effects are cited with p-values as noted — the protein and fat modifiers carry p<0.01 and p<0.05 respectively. Cohort filtering restricts to meals with a measured glucose rise between 0 and 100 mg/dL (ppgr_case='regular'). Raisin bran logs were identified via regex matching on the canonical phrase 'raisin bran'. The single-item cohort (n=129) meets the medium-confidence threshold (≥100 meals) but not the high-confidence threshold (≥500); estimates should be treated as directionally reliable but carry wider uncertainty than high-confidence cohorts. A minimum of 30 matched meals is used for modifier slots in the recipe builder at this cohort size.