Phd nutrition waxy vol is a fantastic complex carbohydrate supplement this is perfect for any long term endurance athlete looking for a slow release energy supplement and carbohydrates to maximise recoveryr carbohydrates provide our body with fuel for physical activity they are burned more efficiently than protein or fatr phd nutrition waxy vol powder features slow burning carbohydrates made from raw barley waxy barley starch contains healthy beta glucan fibre and brings you all the extra g