If your recommend protein intake is 70 grams per day (meaning you weigh about 195 pounds / 87 kg) and you’re only getting 20 grams per day, then you are likely already experiencing health issues.
Weakness and fatigue, meaning you’ll feel exhausted - mentally, physically, or both
Skin, Hair, and Nail Problems
Mood changes, including the development of mood disorders, such as depression
Compromised immune system
Slowed wound healing
Decline in bone strength
Fatty liver
Weight loss due to your muscles and organs being broken down - but my understanding is this is mostly relevant if your overall caloric intake is quite low (starvation levels)
Weight gain due to fluid retention or increased hunger
Not all of those are immediately noticeable.
However, I’m with the other commenter who said that they think it’s likely that you’re under-estimating your daily protein intake. What method did you use for tracking and calculating it?
If your recommend protein intake is 70 grams per day (meaning you weigh about 195 pounds / 87 kg) and you’re only getting 20 grams per day, then you are likely already experiencing health issues.
From https://www.verywellhealth.com/protein-deficiency-symptoms-8756264 you could expect to experience:
Not all of those are immediately noticeable.
However, I’m with the other commenter who said that they think it’s likely that you’re under-estimating your daily protein intake. What method did you use for tracking and calculating it?