truefuels CoreCtrl – 8-Day Hot-Weather Preparation


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  • A structured eight-day hot-weather preparation protocol
  • 4,000mg L-taurine per sachet with potassium, calcium and magnesium
  • Pre-event preparation—not an in-session carbohydrate fuel

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Description

An eight-day hot-weather preparation protocol built around 4,000mg L-taurine per sachet.

truefuels CoreCtrl is not an energy gel and it is not a race-day rescue product. It is a specialist supplement designed to sit alongside sensible heat acclimation, pacing, hydration and fuelling before an event expected to be warm or humid.

What CoreCtrl provides

L-taurine 4,000mg
Potassium 300mg
Calcium 120mg
Magnesium 60mg
Salt 0.26g per serving
Energy 1kcal per serving

How the protocol works

The manufacturer instructs athletes to take one sachet daily for eight days, with the final serving on event morning. For athletes under 60kg, truefuels specifies a two-days-on, one-day-off pattern; this extends the protocol to 12 days, with the final dose still taken on event morning.

The eight-sachet pack is the natural starting point. The 16- and 32-sachet formats suit multiple events or extended use, but truefuels notes that long-term studies are limited and suggests a break of about one week after 24 or more continuous days.

Who might consider it?

It is aimed at endurance athletes preparing for a warm marathon, ultra, triathlon, cycling event or functional-endurance competition. It should support—not replace—heat adaptation, appropriate fluid and electrolyte intake, carbohydrate fuelling and sensible pacing.

Ingredients

L-taurine (4,000mg), potassium (300mg), calcium (120mg), magnesium (60mg), Himalayan rock salt and black pepper extract.

Important before use

CoreCtrl is a specialist supplement. Informed Sport independently lists CoreCtrl as certified, but Ready Sweat Go has not verified the exact batch held in stock; tested athletes should check the sachet batch in the current directory. Do not introduce it for the first time immediately before an important race. If you have a medical condition, take medication, are pregnant or breastfeeding, or are unsure whether a high-dose taurine supplement is appropriate, speak to a qualified healthcare professional.

Build the rest of your plan with energy gels, hydration and drink mixes, and the wider endurance range.

Shipping information

UK delivery

Royal Mail Tracked 48 is £3.89 for orders under £35 and free from £35.

Royal Mail Tracked 24 is £5.79 below £35, £4.49 from £35 to £54.99, and £3.49 from £55.

Delivery options and final charges are confirmed at checkout.

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Pairs well with

Endurance athlete preparing for hot-weather performance with truefuels CoreCtrl
truefuels CoreCtrl ingredients and 4000mg taurine formula

Prepare for heat before the start line.

Nutrition, actives and protocol

What one CoreCtrl sachet provides

A specialist pre-event supplement. The active quantities and protocol matter more than its negligible energy contribution.

1 sachetofficial serving

4,000mg L-taurine per sachetprimary metric

RSG variants: 8, 16 or 32 sachetsRSG pack formats

Typical values and manufacturer-listed actives per serving
Typical value Per sachet
Energy 5kJ / 1kcal
Carbohydrate 0.3g
of which sugars 0.3g
Salt 0.26g
L-taurine 4,000mg
Potassium 300mg
Calcium 120mg
Magnesium 60mg

Best for

Structured preparation before training or competition expected to be warm or humid; not an in-session carbohydrate fuel.

Activity fit

  • Running
  • Cycling
  • Triathlon
  • HYROX
  • Hot-weather endurance events
Nutrition and active quantities
Per serving: 5kJ / 1kcal, 0.3g carbohydrate, 0.3g sugars, 0g fat, 0g protein, 0g fibre and 0.26g salt. Actives listed by the manufacturer: 4,000mg L-taurine, 300mg potassium, 120mg calcium and 60mg magnesium.
Ingredients
L-taurine (4,000mg), potassium (300mg), calcium (120mg), magnesium (60mg), Himalayan rock salt and black pepper extract.
Dietary suitability and allergens
  • Vegan — manufacturer stated
  • Gluten free — manufacturer stated

The official product page states vegan and gluten free. A complete regulated allergen declaration was not independently verified in this audit; check the current sachet before use if an allergy or intolerance applies.

Preparation and directions
Follow the current pack directions. Standard protocol is one sachet daily for 8 days, with the final dose on event morning. Athletes under 60kg should follow the manufacturer’s 2-days-on, 1-day-off 12-day pattern.
Training and event use

Training: Trial the complete protocol before a lower-priority hot-weather session while monitoring tolerance, hydration and the rest of the plan. It does not replace heat acclimation.

Event use: Manufacturer protocol: one sachet daily for 8 days, final dose on event morning. For athletes under 60kg, the manufacturer specifies 2 days on and 1 day off, extending the protocol to 12 days with the final dose still on event morning.

Certification and testing
Informed Sport independently lists CoreCtrl as a certified product and showed batch 31886 when checked. The exact RSG stock batch has not been verified; tested athletes must check the sachet batch against the current directory before use.
Cautions and individual suitability
CoreCtrl is a specialist supplement. Long-term studies are limited; truefuels suggests a break of about one week after 24 or more continuous days. Seek qualified healthcare advice if pregnant or breastfeeding, taking medication, managing a medical condition or unsure about suitability.

Source: official manufacturer product page, checked 26 August 2026. Always check the current pack before use.

Keep preparation and race fuel separate.

Explore Endurance Fuel

truefuels CoreCtrl FAQs

What is truefuels CoreCtrl?

CoreCtrl is a powdered supplement designed as an eight-day preparation protocol before a hot-weather endurance event. It is not an energy gel or an in-session drink mix.

How do I use the eight-day protocol?

Follow the current pack directions. The standard protocol is one sachet daily for eight days, with the final sachet on event morning. For athletes under 60kg, truefuels specifies two days on and one day off, extending the protocol to 12 days with the final dose still on event morning.

What does one sachet contain?

truefuels lists 4,000mg L-taurine, 300mg potassium, 120mg calcium and 60mg magnesium per sachet, alongside Himalayan rock salt and black pepper extract.

Does CoreCtrl replace heat acclimation?

No. Treat it as one possible part of preparation, not a substitute for a sensible acclimation plan, pacing, hydration, cooling and medical judgement.

Does it fuel the event?

No. A sachet contains only about 1 kcal and 0.3g carbohydrate. Plan race-day carbohydrate, fluid and sodium separately and practise them in training.

Who should seek advice before using CoreCtrl?

Consult an appropriate healthcare professional before use if you are pregnant or breastfeeding, take medication, have a medical condition, or are unsure whether the ingredients are suitable for you.

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