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The food libraryWhich oatmeal?The packetJenny sorts the oats3.3 unitsA third of it is sugarSlow food, fast spikeThe pre-bolusNothing to extend
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Bolus 4 · Episode 1619

Oatmeal

One packet of instant maple-and-brown-sugar oatmeal: 33 carbs, and a third of them are added sugar. Scott, who has never eaten oatmeal in his life, reads the label; Jenny explains why a slow food with a fast sugar on top is exactly the wrong thing to under-pre-bolus at breakfast.

Scott Benner and Jenny Smith, RD, CDCES, LD
Open the Bolus 4 estimator
Carb ratio1:10
Sensitivity100
Target100
Fat + protein50%

The standing Bolus 4 example, set here for the first time: one unit covers 10 carbs, one unit moves you 100 points, so the math stays simple. Jenny adds the rest: stable, in target, a blood sugar of 100, not rising, no low treated. Nothing to correct. A packet of oatmeal has almost no fat or protein, so the fat-protein side of the estimator never comes into play. 8:48

01 · Bolus 4 · Episode 1619

The food library

The first Bolus 4 they recorded — Scott says you'll be able to tell. The plan: simple single foods first, then menu items, because people keep asking how to bolus for the rolls at Texas Roadhouse.

2:20
Why start with an orange2:20
  1. Simple foods, then whole mealsJenny's read of the idea: a progressive build. Work the single items first — an orange, a banana, a bowl of oatmeal — then put them together into complete meals and menu items.
  2. The real goal is a better swagScott's bet is that a library of small episodes teaches people to estimate. Everyone starts with a scale and an app; years in, you look at the plate and say 45 grams. These are meant to get you there faster.
Takeaway3:58

Define oatmeal first

Jenny's first move when Scott says oatmeal: which one? The little flavored packets of quick oats, or old-fashioned thick rolled oats? There's a difference, and it matters to the bolus. Scott picks what people probably eat — the instant packets.

02 · Bolus 4 · Episode 1619

One packet

A variety box off Amazon — maple and brown sugar, cinnamon and spice, apples and cinnamon, peaches and cream. Scott reads the maple and brown sugar label.

4:18

Maple and brown sugar — one packet

12g of that is sugar
33carb4protein1fat
3.30u up front0.00u no wave3.30u total
33 carbs, 3 grams of fiber (1 soluble), 12 grams of sugar, 4 grams of protein — grains keep their protein, Jenny says, more so the less processed they are. 260 milligrams of sodium. The fat on the label was read as two half-gram lines, saturated and polyunsaturated; the page carries that as one gram.

A third of the carbs are sugar, and it's added sugar. Jenny's math on the recording: 12 of the 33 grams. That is the number that changes the bolus — not the oats.

Off the packet · at 1:10, blood sugar 100, nothing to correct  ·  Click any item to hear that moment
Jenny sorts the oats5:26

The more processed the oat, the faster it cooks — and the faster it hits.

  1. Quick-cook packetsBroken down and ground up, which is why they cook in a minute and come out like mush. Flavored versions add sugar; the apple-cinnamon kind, in her words, has not much real apple and probably lots of sugar.
  2. Old-fashioned thick rolledJenny's preference. Less processed, more of the fiber and protein left in. She likes them as overnight oats — soaked in liquid until soft, eaten cold or barely warmed — which changes their glycemic nature.
  3. Steel cutA world of people love them. Jenny is not one of them.
  4. Scott's positionNever had oatmeal in his life. Oatmeal, to him, looks like small pieces of cardboard in mush — and he's going to sound like an alien talking about it. Jenny: cooked or soaked right, they're soft, more breakfast-foodie than plain rice. The quick-cook kind really is closer to mush, because it's been ground down.
03 · Bolus 4 · Episode 1619

3.3 units

The practice person gets set up for the first time — one unit for 10 carbs, one unit moves 100 points — and Scott does the packet's math. Twice.

8:48
One packet · 1:10 · 100 · target 1009:29
33carb4protein1fat
Up front
3.30u
33 ÷ 10 — “3.3 units”
No extended wave
0.00u
0.3 fat-protein units
Theoretical requirement
3.30u
0% of it is not carbs

Scott read 18 carbs first and said 1.8 units; Jenny caught it — “there are only 18 carbs in that little packet, really?” — and he corrected to 33 and 3.3 units. Four grams of protein and a gram of fat are a quarter of a fat-protein unit, far below the estimator's cutoff, so there is nothing to extend.

12g
of sugar in one packet — a third of the carbs

Oats on their own break down slowly. Flavored quick oats put a third of their carbohydrate on top as added sugar, so you get a heavier glycemic impact than the oats alone would give. Not terribly different on the index — but the index isn't what you did to them.

Jenny's glycemic index numbers9:47
50s
old-fashioned rolled oats
Moderate on the index — the slow part of the food.
60s
quick-cook, flavored
Also moderate, a step higher. Then the added sugar and the flavoring change how it behaves.

“They're not terribly different, but it's what you end up doing to them that can make the difference.”

04 · Bolus 4 · Episode 1619

Build the bolus

A slow-digesting material with a quick spike on top, eaten at the hardest hour of the day to bolus. Scott's phrase for the result: a 320 that lasts three hours.

10:53
Takeaway10:53

Slow food, fast sugar, first thing in the morning

Scott's picture of it: the oats take forever to digest, the sugar hits right away, and it all lands at breakfast — feet on the floor, adrenaline about the day, a lower overnight basal, more resistance and less insulin working. Throw a packet of sweetened oatmeal at that and you get a 320 blood sugar that lasts for three hours.

The pre-bolus does the work12:08

Stable at 100, nothing else on the plate — no eggs first, no butter in the bowl. Just the oats, and out the door.

  1. Long and aggressiveScott anticipates a quick rise and wants a long pre-bolus. His old marker: an 80 with a diagonal-down arrow on the CGM before the oatmeal hits, because the sugar is going to hit fast.
  2. Bolus when your feet hit the floorJenny's version: if you're the quick-eat person in the morning, the bolus goes in almost as soon as you're out of bed, and you get ready while it works. Her own quick-oats years in the college cafeteria took about 30 minutes of lead time.
  3. Plain quick oats: still 15 to 20 minutesWithout the added sugar the lead time comes down, but not to five minutes. It's still a fast carb; it just hits a lot harder with sugar on top.
  4. Not at 100? Layer the correctionThe L in Meal Bolt: if you're 120 or 150 instead, the same pre-bolus carries the correction that brings you to target.
Takeaway14:15

Nothing to extend

Does it need an extended bolus or a follow-up? Not if you're really on top of the pre-bolus, Jenny says. There is nothing sticky here, not much fiber, no fat or protein to linger past three hours — an in-and-out carbohydrate that clears the way rapid insulin clears. Get the timing right and the meal and the insulin coincide.

Look, then tweak15:18
  1. One hour, then threeSee where you are at an hour; spot-check at three, or whatever you're comfortable with. Then take notes.
  2. Adjust and try againRatio, pre-bolus a little longer or shorter — give it another whirl. Scott passes along a line someone posted online about ice cream: the strategy is to keep going back and eating ice cream until you figure it out. Jenny: that's exactly what this is.
Take a picture of this one

Things to remember from this one

The numbers that transfer to the next breakfast.

33gcarb
in one packet of flavored instant oatmeal — 12 of them added sugar
⅓sugar
of the packet's carbs, which is what makes it hit fast — Jenny
30minutes
of pre-bolus Jenny needed for cafeteria quick oats; 15 to 20 for plain quick oats
0extended
nothing sticky, nothing to linger — get the pre-bolus right and you're done

“There's really nothing that's going to hold this food for a long time.”

Jenny Smith14:15

“So that's where you get a 320 blood sugar that lasts for three hours.”

Scott Benner10:53

“It's what you end up doing to them that can make the difference.”

Jenny Smith9:47

“Try your oatmeal again.”

Scott Benner16:10
The tool

Bolus 4 Estimator

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The method

Meal Bolt

The tutorial the whole series is built on.

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The series

Bolus 4

One food per episode, with Scott and Jenny.

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Everything on this page is a simulation for education, not medical advice. Nothing here should change your insulin dosing without your care team.
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