# Is 1/6 G enough for humans to stay healthy?

Micro-G is known to be detrimental to health in the long-term. However, the Moon is at $$\frac{1}{6}$$ G (while Mars is at ~$$\frac{3}{8}$$ G). Is $$\frac{1}{6}$$ G enough for humans to remain healthy in the long term?

(While there are many concerns that make Moon colonization difficult -- i.e. long night/day cycles resulting in large temperature swings -- please focus on the gravity/health question for now.)

This question may be answered in the long term by the Space Studies Institute's "G-Lab" program.

• Interesting question, I'm not sure if we actually know as we haven't had anyone living in low gravity for any length of time.
– GdD
Sep 20, 2021 at 16:12
• Sep 20, 2021 at 16:21
• I have asked this myself for a while, maybe our bodies are much better able to cope in mini-gravity than in micro-gravity. I don't think there are many studies on this (how would there..) but let's see what others know.. Sep 20, 2021 at 21:40
• Related but not necessarily a duplicate: Least artificial gravity needed to maintain health on a one year space trip? HopDavid's answer is "Finding minimum gravity to keep humans healthy should be a high priority....At this time it remains an open question. We really have only two data points: the weightlessness of someone in orbit and the full g on earth's surface" and it links to their blog post What is Minimum Spin Hab? As Uwe points out, the answer here is the same.
– uhoh
Sep 21, 2021 at 1:05