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Dr. Jess@doctorjesssInstagram

Target fiber per day is 25-35g for healthy adults. Drink with a lot of water. #doctor #boston #healthtips

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what it claims

Aim for 25-35g of fiber a day, and drink plenty of water alongside it — fiber needs fluid to do its job.

holds up

The number checks out against official guidance: US reference intakes (IOM/Dietary Guidelines) target 25g/day for women and 38g/day for men (21g and 30g past age 50), and the…

noli's read

The number checks out against official guidance: US reference intakes (IOM/Dietary Guidelines) target 25g/day for women and 38g/day for men (21g and 30g past age 50), and the Reynolds et al. 2019 review places the strongest tipping point for mortality and cardiometabolic risk between 25-29g/day. So '25-35g' is a reasonable universal approximation, even if it slightly undersells the optimal target for men. Pairing fiber with water is also well-grounded: soluble fiber absorbs water to form a gel that slows digestion and softens stool, and without enough fluid, a fiber increase can actually make constipation worse. It's a short, correct, actionable piece of advice that doesn't need much more nuance.

the sources

Claimed by Dr. Jess. Noli grades the claim, never the person.

Decoded by Noli · August 3, 2026 · the original post

What the graded evidence says

Evidence: A-

Linked to, not proven to cause.

Effect: all-cause mortality, high vs low fibre intake — -15-30%
Measured on: WHO-commissioned series: 185 prospective studies + 58 trials

Huge and consistent, but observational + trials on intermediate outcomes.

Dr. Jess in the Register1 claims gradedSee their record →

Others on this

A tea steeped from fennel, cumin, and coriander seeds for five minutes is said to move trapped gas along and ease bloating fairly quickly.

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For women in their 20s: four basics are enough — omega-3, vitamin D3, magnesium glycinate, and a quality probiotic — rather than 15 supplements.

mixedThebiohackingrn

Add half a cup of lentils and half a cup of quinoa to one cup of white rice to easily increase protein (44g) and fiber (30g) intake without sacrificing the pleasure of white rice.

holds upKylie Sakaida

Noli has read similar claims

Other advice in the Register that leans on the same research.

Compose simple meals by systematically combining sources of protein and fiber (such as oats, vegetables, or legumes) to optimize the feeling of fullness, support gut health, and help regulate blood glucose as well as cholesterol.

holds upKylie Sakaida

Consume a snack consisting of popcorn, roasted chickpeas, and pumpkin seeds to easily obtain 10 grams of fiber, which is equivalent to the average daily intake of some adults.

holds upKylie Sakaida

To manage bloating associated with irritable bowel syndrome (IBS), it is preferable to identify specific FODMAP triggers rather than eliminating fiber, and to opt for better-tolerated fiber sources (such as kiwifruit) or digestive aids (enzymes) rather than aiming for caloric restriction to appear thinner.

holds upAbbey Sharp Registered Dietitian

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