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Ingredient dossier · No. 025

Sucralose

Also: Splenda · E955 · trichlorogalactosucrose


Probably fine occasionallythe gut microbiome data is concerning enough to avoid daily use, especially in pre-workout taken on an empty stomach.


01 · Hormonal impact

Testosterone & hormonal load

Evidence
WeakIn vitro only or single study

Sucralose does not have established direct testosterone effects in humans. The concern is indirect: sucralose alters gut microbiome composition, which influences gut barrier integrity, inflammation, and potentially metabolic hormone signaling. Some human studies show a glucose response alteration when sucralose is consumed before a glucose load. Direct testosterone effects are not demonstrated in human studies.


02 · Where it appears

Found in.

01Protein powder
02BCAAs
03Pre-workout supplements
04Protein bars
05Sugar-free supplements
06Diet sodas

03 · The regulators

Two jurisdictions, two different verdicts.

European Union

Approved sweetener E955 with ADI of 15 mg/kg body weight per day (EFSA).

United States · FDA

GRAS. Acceptable daily intake set at 5 mg/kg body weight/day. Approved in 1998.


04 · Sources

The receipts.

  1. [01]
  2. [02]
  3. [03]
    FDA — Sucralose GRAS notice
    www.fda.gov/food/food-additives-petitions/high-intensity-sweeteners

05 · Related dossiers
01AspartameC · 48
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