My Cart


Free NZ Shipping on orders $100 and over

CLINICIANS Hi-Dose Vitamin C Powder 300g

- Rewards Points ?

or 6 weekly payments of $6.99 Laybuy

Clinicians Hi-Dose Vit C Powder is a potent formulation containing two forms of Vitamin C that may support the immune system in times of stress. Each teaspoonful provides a high 3550mg dose of Sodium ascorbate and Ascorbic acid, buffered forms that are well tolerated and easily absorbed by the digestive tract. 
Hi-Dose Vit C can be taken every 2-3 hours when ills and chills strike to provide acute support to the immune system.  Studies show Vitamin C absorption is greatly increased in individuals when they are unwell before reaching bowel  tolerance and provoking side effects. This is due to increased support required for immune system function. Hi-Dose Vit C is also appropriate for daily use as it supports stress hormone production from the adrenal glands during times of stress. 
    Active ingredients per 5ml level teaspoon: 
    Vitamin C (from sodium ascorbate) (equiv. Sodium 372mg) 2850mg
    Vitamin C (ascorbic acid) 700mg
    Vitamin B2 (riboflavin) 3mg
    Also contains: Natural flavourings and Thaumatin

    Adults: 1 level teaspoon in water or juice 1-2 times daily.  
    Immediate Support (for short term adult use only): Day 1-3: Mix 1 level teaspoon in water or juice every 2 to 3 hours during waking hours. Monitor dosage in acccordance with bowel tolerance.
    Day 4-7: Mix 2 level teaspoonsful twice or three times daily.  
    After Day 7: Return to recommended adult dosage or as directed by your health professional. 


    • This product may cause bowel looseness. 
    • If you are on any medication, please consult with your health professional before taking this product. 
    • If symptoms persist or you have any side effects please contact your health professional.
    • Do not take high doses of Vitamin C if you have a gastric ulcer or ulcerative colitis. 
    • Considered suitable for use during pregnancy and breastfeeding.  


      FREE for orders $100 and over. Orders under value of $50 (including any promotional code used) incurs a shipping fee of $6 nationwide.


      For most areas orders are shipped overnight on business days, but may take up to 3 business days from the day it was fulfilled. In some remote areas delivery can take up to 10 business days. Delays can be expected due to the overwhelming demand for courier services during COVID-19, so deliveries can take more time than usual.

      We aim to fulfill the order as soon as we receive it on the same business day during opening hours, once the order is fulfilled in store you will receive a notification.

      We want to make sure your product gets to you safe and sound, so by default we require a signature on all of our deliveries. If you prefer not to, please add in any other instructions in the cart notes during checkout.


      We accept returns of unused, unopened and undamaged items in original condition and the product is eligible for return within 30 days of purchase. Some items may not be eligible for a return, please refer to our excluded items list below or contact us if unsure.

      Click here for our full delivery and returns information.