“Most people should consume 25-35 grams of fiber and 46-56 grams of protein each day.”
This is fine and all but that is an very low amount of protein for someone who is an athlete.
I’ve looked for some standard of protein-to-fiber ratio or how much fiber you should have on a high protein diet, but it seems that there isn’t a clear answer that I could find. There was nothing fairly universally recommended like the “0.8-1 grams of protein per pound of bodyweight” standard for building muscle.
How much fiber should you have if you eat 200g of protein everyday? 250? 300?
Fibre is not as important as it is made out to be. It’s such a triviality. Take it or leave it. If you have constipation, best avoid it. People will bang on about the microbiome - but it is very poorly understood at this point.
Personally I think fibre is promoted as it one of the things that only plants provide, and that provides just the right amount of bias to skew policy. Good luck in finding scientific studies that justify 30g a day (or whatever random number has been chosen) to back the recommendation.
your fiber intake doesn’t have to cross 50g per day. fiber is not like protein. most people do well with 20-50g fiber a day. too much fiber can cause constipation (if you don’t drink enough water) and also inhibit nutrient absorption.
###Protein intake for athletes
‘The current data suggests that physically active individuals should consume 1.2 to 2.0 grams per kilogram of body weight (0.5 to 0.9 grams per pound of bodyweight) regardless if the individual is a strength or endurance athlete.’
Protein Intake for Athletes, Michigan State University
 
You should eat a diet of whole foods with multiple servings from all food groups.
If you want more protein eat lean meat, fish, eggs, dairy, legumes, nuts.
If you want more fiber eat vegetable, fruit, legumes, whole grains.
You mentioned building muscle. If you’re taking protein supplements there are risks you should consider.
 
###What are the risks? [of protein powders]
There are numerous risks to consider when using a protein powder. Among them:
###A new risk revealed
Earlier this year, a nonprofit group called the Clean Label Project released a report about toxins in protein powders. Researchers screened 134 products for 130 types of toxins and found that many protein powders contained heavy metals (lead, arsenic, cadmium, and mercury), bisphenol-A (BPA, which is used to make plastic), pesticides, or other contaminants with links to cancer and other health conditions. Some toxins were present in significant quantities. For example, one protein powder contained 25 times the allowed limit of BPA.
https://www.health.harvard.edu/staying-healthy/the-hidden-dangers-of-protein-powders