The CDC has yet to completely understand the significance of the effects of how COVID-19 affects our bodies long-term, but physicians do absolutely recommend a healthy diet, exercise and therapy during this time along with safety precautions such as wearing masks.
Gwyneth Paltrow certainly has some great holistic resources to share with her readers and consumers about COVID-19 but, at the end of the day, she 1) does run a business and 2) is not a medical professional.