Repair and growth

  • The human body is in a constant state of regeneration, from the cells in our skeleton to the nails on our toes.
  • But some cells are replaced more quickly than others, and some body parts never get replaced.
  • The graphic below illustrates how cellular regeneration and regrowth happens in your body.
Human bodies change and regenerate throughout our lives.

That process is easy to see if you watch babies' limbs grow and their bodies get bigger. It's also obvious when our toenails grow or healthy skin emerges after a burn peels away. 

But less obvious systems of regrowth and rebirth in the body continue through adulthood. Dead skin cells constantly rise to the surface of our body, get sloughed off, then are replaced by new stem cells.

Some areas of the body take a long time to refresh themselves — for example, our fat-storage cells shift roughly once per decade, while we get fresh liver cells about once every 300 days.

Of course, your body doesn't simply throw away an entire liver's worth of cells on day 300 and create a brand new set on 301. Instead, it's more of an organic cycle, since liver cells continue to divide and regenerate long after they're mature.

Not every body part regenerates or changes, though. While the body's hairs are in a near constant state of growth, parts of the human brain and head pretty much finish developing at birth (like the lens of the eye that's helping you read this).

Eventually, the tips of our DNA begin to fray as years of wear and tear take their toll on the body — part of the natural aging process.

Here are just a few of the myriad ways that your body regenerates, regrows, and starts anew all the time. 

growth and repair of the human body
Not all members of the animal kingdom have the same processes of regeneration, of course. Some get wild with their techniques: freaked out geckos can drop their tails and grow new ones, spiders will grow replacement legs after one falls off or breaks, and deer shed their antlers and grow a new rack each year. 

Herbal remedies beneficial to the growth and repair of the body
Shiitake mushroom    
30 capsules
mushroom - one a day
(Withania somnifera)
(Astragalus membranaceus)
(Bacopa monnieri)
(Arctium lappa)
*Black Cohosh
(Cimicifuga racemosa)
(Focus vesiculosus)
*Celery seeds
(Apium graviolens)
*Chanca piedra
(Phyllanthus niruri)
*Ceylon cinnamon
(Cinnamomum zeylanicum)
*Cat's claw
(Uncaria tomentosa)
*Dandelion root
(Taraxacum officinale)
(Trigonella foenum graecum)
*Ginkgo biloba
(Ginkgo biloba)
*Horse chestnut
(Aesculus hippocastanum)
*Hawthorn berry
(Crateagus oxicanthus)
*Horny goat weed
(Epimedium sagittatum)
*Juniper berry
(Juniperus communis)
*Milk thistle
(Sylibum marianum)
(Lepidium meyenii)
*Red clover
(Trifolium pratense)
*American Skullcap
(Scutellaria lateriflora)
*Saw palmetto
(Serenoa repens/serrulata)
*Stinging nettle
(Urtica dioica)
*St John's wort
(Hypericum perforatum)
(Smilax aristolochiifolia)
*Schizandra berry
(Schisandra chinensis)
(Agnus castus)
*Valerian root
(Valeriana officinalis)
*White willow
(Salix alba)
(Achillea millefolium)
*Lion's mane
(Hericium erinaceous
(Lentinula edodes