D-Ribose

●○○Limited Evidence

A pentose sugar that accelerates ATP resynthesis after depletion. Most useful for cardiac patients and those with impaired purine salvage. Modest athletic benefit.

Effective Dose

5–15g / day

per clinical evidence

Evidence Level

Limited

Endurance

Mechanism

ATP and purine nucleotide resynthesis substrate

primary action

Best For

Post-exercise ATP recovery

Heart failure, Chronic fatigue

This profile is for informational purposes only and does not constitute medical advice. Consult a qualified healthcare professional before starting any supplementation, especially if you have pre-existing conditions or take medications.

What Is D-Ribose?

D-ribose is a 5-carbon sugar that is the structural backbone of ATP. During very high-intensity exercise, ATP is degraded to AMP and then to IMP, inosine, and hypoxanthine, which are excreted. Resynthesising ATP from scratch (de novo) is slow; ribose can accelerate recovery via the purine salvage pathway.

How It Works: The Science

Ribose enters the pentose phosphate pathway to generate PRPP (5-phosphoribosyl pyrophosphate), the substrate for purine nucleotide synthesis. This accelerates de novo and salvage synthesis of AMP/ADP/ATP after depletion from ischaemia or very high-intensity exercise. The effect is most significant in tissues with limited de novo synthesis capacity (heart, skeletal muscle).

Primary Mechanism

ATP and purine nucleotide resynthesis substrate

Evidence-Based Benefits

Accelerates ATP recovery after ischaemia in cardiac tissue

moderate

Pliml et al. (1992) — improved exercise tolerance in coronary artery disease patients

May reduce delayed onset muscle soreness after eccentric exercise

limited

Hellsten et al. (2004) — some reduction in DOMS markers; limited human data

Dosage Guide

Effective Dose

5–15g / day

5–15g/day split into 2–3 doses. For exercise performance: 5g before and 5g after training. Can cause hypoglycaemia in diabetics — avoid on an empty stomach if blood sugar sensitive.

Safety Profile & Side Effects

Generally safe. Can cause mild hypoglycaemia at high doses in susceptible individuals. Diarrhoea and headache occasionally reported.

Who Should (and Shouldn't) Take It

Best for

Post-exercise ATP recoveryHeart failureChronic fatigue

Who it's for

Cardiac patients, those with chronic fatigue or fibromyalgia, and highly trained athletes requiring rapid recovery between back-to-back training sessions. Limited benefit for recreational athletes.

Frequently Asked Questions

What is the recommended dose of D-Ribose?

5–15g/day split into 2–3 doses. For exercise performance: 5g before and 5g after training. Can cause hypoglycaemia in diabetics — avoid on an empty stomach if blood sugar sensitive.

Is D-Ribose safe?

Generally safe. Can cause mild hypoglycaemia at high doses in susceptible individuals. Diarrhoea and headache occasionally reported.

How does D-Ribose work?

Who should take D-Ribose?

Cardiac patients, those with chronic fatigue or fibromyalgia, and highly trained athletes requiring rapid recovery between back-to-back training sessions. Limited benefit for recreational athletes.

Related Ingredients

CoQ10 (Ubiquinol)Creatine Monohydrate Peak ATP (Adenosine 5′-Triphosphate)

Medical Disclaimer

Ingredient profiles are for informational purposes only and do not constitute medical advice. Consult a qualified healthcare professional before starting any supplementation, especially if you have pre-existing conditions or take medications. Full disclaimer →