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Komal Jethmalani |481 Answers |Ask -Follow

Dietician, Diabetes Expert - Answered on Mar 16, 2026

Komal Jethmalani is a practising dietician and nutritionist with over 26 years of experience.
She specialises in weight loss and diabetes management.
Jethmalani has completed her MSc in food and nutrition from SNDT University and trained at Jaslok Hospital.
She is a NDEP-certified diabetes educator.... more

Asked by Anonymous - Mar 14, 2026Hindi

Health

i have started fast to loose belly fat and hence followed 16/8 cycle . 16 hrs. fast and 8 hrs. meal window. To cope up protein intake , i hv started to use whey +collagen powder of muscle nation brand. At 5 th day i was feeling heavy pain in right side back nearby kidney. so i stopped it. Now i am consuming water to stop kidney aches. My question is that whey powder is not safe. or what should we do to consume it. my waight is 72 kg and i am 57 years age. do yoga and light exercise daily.

Ans: At 57, your metabolism and hydration needs are different from someone in their 20s. Fasting with exercise and protein supplements can stress the system if done too aggressively. If your body isn’t used to protein supplements, the sudden increase can cause bloating, gas, back discomfort, digestive stress. During a 16?hour fast, many people unintentionally drink less water. Whey increases protein load so your kidneys need more water to process urea. Generally, whey is safe for healthy kidneys.
But it must be used correctly.

DISCLAIMER: The answer provided by rediffGURUS is for informational and general awareness purposes only. It is not a substitute for professional medical diagnosis or treatment.

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Komal Jethmalani |481 Answers |Ask -Follow

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Question by Sid - Jan 21, 2022Hindi

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Hi Komal Ma’am, Are protein supplements safe? I work out regularly and have been taking them for a while (since I was 16, I am now 24). Will it harm my health in the long run? I have worked hard on my body and don’t want to lose my shape. Thanks, Sid

Protein supplements are generally whey protein, which is excellent for a high protein uptake post workout.

If you can achieve your protein requirements with natural foods, then it is not necessary to take protein supplements lifelong.

They are advised only in case of a high protein requirement due to HIIT (high intensity interval training workouts) or due to poor protein absorption due to gastric issues or any other illness.

Consistency and compliance, as far as a nutritionally balanced diet and an exercise regimen is concerned, will help you maintain your body shape.

Komal Jethmalani |481 Answers |Ask -Follow

Dietician, Diabetes Expert - Answered on Mar 16, 2026

Question by Nitin - Mar 14, 2026Hindi

Health

i have started fast to loose belly fat and hence followed 16/8 cycle . 16 hrs. fast and 8 hrs. meal window. To cope up protein intake , i hv started to use whey +collagen powder of muscle nation brand. At 5 th day i was feeling heavy pain in right side back nearby kidney. so i stopped it. Now i am consuming water to stop kidney aches. My question is that whey powder is not safe. or what should we do to consume it. my weight is 72 kg and i am 57 years age. do yoga and light exercise daily.

Ans: At 57, your metabolism and hydration needs are different from someone in their 20s. Fasting with exercise and protein supplements can stress the system if done too aggressively. If your body isn’t used to protein supplements, the sudden increase can cause bloating, gas, back discomfort, digestive stress. During a 16?hour fast, many people unintentionally drink less water. Whey increases protein load so your kidneys need more water to process urea. Generally, whey is safe for healthy kidneys.

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