If constipation or diarrhea starts after you begin a fiber supplement, check the product directions, how much you take, and whether you increased the amount quickly. Take psyllium powder or granules with at least 8 ounces (240 mL) of liquid per dose, as directed on the package or prescription. Do not exceed those directions. Contact a clinician or pharmacist before changing a prescribed regimen, or if you have trouble swallowing, relevant health conditions, or questions about medicine interactions.
Timing alone cannot prove the supplement caused the change. Other medicines, diet changes, dehydration, or an unrelated illness may also be involved.
Check how you are taking the supplement
- Verify the product and serving. Check its form, serving size, frequency, and directions. Do not take more than the label or prescription says.
- For psyllium powder or granules, use enough liquid. MedlinePlus directs users to mix each dose with at least 8 ounces (240 mL) of liquid immediately before use. Follow the specific package or prescription instructions: MedlinePlus: Psyllium.
- Consider whether you increased fiber quickly. A large, rapid increase can cause gas, bloating, cramps, or diarrhea. General guidance recommends increasing fiber gradually so your digestive system can adjust: MedlinePlus: Fiber and NIDDK: Eating, Diet, & Nutrition for Constipation.
- Write down what changed. Note the product, amount, timing, symptoms, and any other medicine or diet changes. Share this with a clinician or pharmacist, especially if symptoms persist or concern you.
Do not assume more fiber is always better. NIDDK gives 22 to 34 grams of dietary fiber per day as a general adult range that varies by age and sex; this is a dietary intake range, not a supplement dose. The page was last reviewed in May 2018: NIDDK dietary guidance.
If constipation is the problem
Check that you are taking the supplement with the liquid required by its directions and that you did not make a sudden increase in fiber. General constipation self-care may include adequate fluids with fiber, regular physical activity, and allowing time to respond to the urge to have a bowel movement. A health professional can help determine whether the supplement, another medicine, hydration, or another cause may be contributing. NIDDK advises discussing suspected medicine or supplement causes with a clinician before stopping or changing them: NIDDK: Treatment for Constipation.
#1 Best Overall
- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
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Seek prompt medical attention for constipation accompanied by rectal bleeding or blood in stool, constant abdominal pain, inability to pass gas, vomiting, or fever. Lower back pain and unexplained weight loss are also reasons to contact a doctor. If constipation does not go away with self-care, contact a clinician: NIDDK: Symptoms & Causes of Constipation.
If diarrhea is the problem
Replace fluids and electrolytes lost through diarrhea. NIDDK lists water, electrolyte-containing liquids, and oral rehydration solutions as options. Older adults and people with a weakened immune system, diabetes, kidney disease, or another health condition should ask a doctor before using an oral rehydration solution: NIDDK: Treatment of Diarrhea.
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
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- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
Talk with a doctor right away for dehydration symptoms, frequent vomiting, severe abdominal or rectal pain, blood or pus in stool, or black, tarry stool. For adults, NIDDK also advises contacting a doctor for diarrhea lasting more than two days, a high fever, or six or more loose stools in a day. Pregnant people, adults over 65, people taking antibiotics, and people with weakened immune systems are at higher risk of complications and should keep in touch with a doctor: NIDDK: Symptoms & Causes of Diarrhea.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.When to get professional advice before changing your routine
Ask a clinician or pharmacist before changing a prescribed treatment or if you have trouble swallowing, a history of intestinal blockage, certain health conditions, or take medicines that may interact with a fiber product. Psyllium products come in different forms, and their directions and precautions can vary; use the instructions for your exact product rather than assuming another form has the same requirements. See MedlinePlus: Psyllium and NIDDK: Treatment for Constipation.
Quick Recap
Best Value
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
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- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
Rank #4
- Dual Converters, Infinite Potential：Includes 2× USB C male to USB A female adapters and 2× USB A male to USB C female adapters. Perfect for a wide range of uses—tablets with Bluetooth keyboards, expand USB ports on macbook, and more. Two different converters for all your daily needs
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- Please Note: To reach 10Gbps speed, keep the cable under 3.3 ft. For USB A Male to USB C adapters, try flipping the USB C connector. USB C Male to USB A adapters support bidirectional 10Gbps transfer within 3.3 ft
Rank #3
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