During-effort fuel · gel · reviewed 3 Sep 2026
PF 300 Flow Gel 72
300 g of carbohydrate in one 510 g pouch meant to be poured into a bottle or flask rather than squeezed neat -- at 7.3 cents a gram, almost exactly what Precision already charges per gram for its own PF 90 Gel, just scaled into a format built for a whole ride instead of one 90 g hit.
Score breakdown
Each dimension below is scored 0 to 100 against a fixed scale, not against the rest of the catalog, so adding a product never moves this number. The overall score is the average of the dimensions this product declares data for. How the scales are set →
72/100
Strong
Absorption rate ?How much carbohydrate an hour the glucose-to-fructose blend can move. Scored from the stated or derived ratio (1:0.8 tops out this scale); an Estimated ratio counts the same as a Stated one here.72
Carb density ?How much fuel one sachet carries. 90 g is the ceiling here, matching the top of the range cited for multi-transportable-carb intake.100
Value (cost/gram) ?Price of one gram of carbohydrate. Not physiological -- a market-based scale from 15 cents/g (0) to 2 cents/g (100).59
Gut comfort ?A proxy, not a taste or tolerance test: shorter ingredient lists score higher, from 15 ingredients (0) to 1 (100). Nobody has actually run these through anyone's gut for this score.57
Cost per gram of carbohydrate
7.3 cents/g
Glucose : fructose
1:0.5
Comparison
6 of 38 gels heldPrices per single sachet at the cheapest box size we track. Best in green, worst in red, across the gels shown.
| Measure | Precision Fuel & Hydration PF 300 Flow Gel | Maurten Maurten Gel 100 | Science in Sport SiS Beta Fuel Gel | Precision Fuel & Hydration Precision Fuel PF 30 Gel | NEVERSECOND NEVERSECOND C30 Gel | GU Energy Labs GU Original Energy Gel |
|---|---|---|---|---|---|---|
| Overall scoreAn average of the various variables measured. | 72 | 47 | 58 | 49 | 42 | 33 |
| CarbohydrateHow much fuel one pouch carries. | 300 g | 25 g | 40 g | 30 g | 30 g | 22 g |
| Glucose : fructoseGoverns how fast you absorb it. More fructose, higher ceiling. | 1 : 0.5 | 1 : 0.8 | 1 : 0.77 | 1 : 0.5 | 1 : 0.5 | ~ 1 : 0.47 |
| SodiumAgainst 400 to 1000 mg an hour typically lost in sweat. | 0 mg | 20 mg | 30 mg | not declared | 200 mg | 60 mg |
| ProvenanceWhether that ratio is read off the panel, computed from it, or inferred. | Stated | Stated | Derived | Stated | Stated | Estimated |
| Price per pouchWhat one costs. Not comparable across pouch sizes. | $21.99 | $3.75 | $2.50 | $3.12 | $3.50 | $2.00 |
| Cost per gramThe only price that compares across pouch sizes. | 7.3 cents | 15 cents | 6.3 cents | 10.4 cents | 11.7 cents | 9.1 cents |
| Pouches for 90 g/hrHow many you open an hour to hold a 90 g/hr target. | 0.3 | 3.6 | 2.3 | 3.0 | 3.0 | 4.1 |
Verdict
what it does · what it costsWhat it does well
- 300 g of carbohydrate from a single pouch, over 3x a PF 90 Gel and 10x a PF 30 Gel, meaning fewer individual gels to carry, open, and pack out.
- States a 2:1 glucose-to-fructose ratio (1:0.5), the same blend Precision uses across PF 30 and PF 90, rather than leaving it undisclosed.
- Six-ingredient label: maltodextrin, water, fructose, pectin, citric acid, two preservatives. Nothing beyond what's needed to move the carbohydrate.
- 7.3 cents a gram lands almost exactly on PF 90 Gel's 7.4 cents, so the jump to a 300 g format doesn't carry a size premium.
What it costs you
- Zero sodium. Precision's own product copy says the gel carries no electrolytes and is meant to be paired with the PH tablet range, same gap as PF 90 Gel, just at 3x the volume.
- No sugars breakdown on the label, only total carbohydrate (300 g); we can't say how much of that is fructose versus maltodextrin beyond the stated 2:1 ratio.
- $21.99 for a single pouch is a real one-time spend, and it's sold as an individual unit; no box/multi-pack discount was listed at any retailer checked.
- Nearly twice the per-gram cost of SiS Beta Fuel gel (6.3 cents/g), even though it undercuts Maurten Gel 100 (15 cents/g) by half.
Where to buy
Prices and links as last checked. The price next to the name above is per unit at the cheapest box size we track -- a single-unit price below may run higher.
Who this is for
the numbers, appliedThe field tells you what it is. This is who should act on it.
Worth the money if
- You want to pre-load a flask or soft bottle with a whole ride's worth of carbohydrate instead of managing a stack of small gels.
- You already use PF 90 Gel and want the same ratio and cost per gram scaled into one big format.
- You already carry sodium separately (PH tabs, a drink mix) and don't need this gel to cover it.
Look elsewhere if
- You want a gel you can eat neat without decanting it into a bottle first.
- You need sodium built into your carbohydrate source.
- You're fueling short enough that 300 g is far more than you'll use in one session.