Shop

Stress Hormones Hold Follicle Stem Cells in Rest

Stress and hair are linked in mouse experiments by named signals, and reishi has a human antioxidant trial that measured different endpoints. Folli-Activ includes Ganoderma lucidum. This essay keeps the two literatures in the same article and does not pretend they are one experiment. No paper opened here gave reishi to a stressed mouse and counted hairs, and none gave Folli-Activ to exam students.

Corticosterone, Gas6, and stem-cell rest

Choi, Zhang, Ma, Gonzalez-Celeiro, and colleagues studied corticosterone, the rodent equivalent of cortisol, made in the adrenal gland. In mice, this hormone regulates hair follicle stem-cell quiescence. When systemic corticosterone is absent, follicle stem cells enter more rounds of regeneration across life. Under chronic stress, higher corticosterone prolongs quiescence and holds follicles in an extended resting phase. The hormone acts on the dermal papilla and suppresses Gas6, a secreted factor. Restoring Gas6 overcomes that stress-induced block and lets stem cells activate and hair grow. The paper identifies corticosterone as a systemic inhibitor of follicle stem-cell activity, acting through the niche.

That is a complete mechanism in the mouse: adrenal hormone, dermal papilla, loss of Gas6, stem cells stay quiet, follicle stays in rest. It is a direct account of how a stress hormone stops the next hair cycle. The resting phase in this experiment is not a metaphor. It is a stem-cell state under endocrine control.

Substance P in a psychoemotional stress model

Peters, Arck, and Paus reviewed a mouse model in which sonic stress inhibits hair growth. The mediators they name are substance P and nerve growth factor. The effects include perifollicular neurogenic inflammation, apoptosis of hair-follicle keratinocytes, less proliferation in the follicle epithelium, and premature entry into catagen, the regression phase. Most of these effects were abrogated by a neurokinin-1 receptor antagonist, which blocks the substance P receptor, or by an antibody that neutralizes nerve growth factor. Topical minoxidil also blocked much of the stress effect in that model. The authors describe a brain-to-follicle axis that psychoemotional stress can use to end a growth phase early.

In this model, stress does not act as a mood. It acts as substance P, nerve growth factor, perifollicular inflammation, and an early catagen. That is a different pathway from Choi's corticosterone-Gas6 pathway. Both are mouse pathways. Both end with a follicle that is not in a productive growth phase. A formula essay can name both without collapsing them into one receptor.

What a human exam period did, and did not, show

Peters, Müller, Snaga, Fliege, and colleagues followed 33 female medical students, 18 in a major exam period and 15 as a comparison group, at three visits 12 weeks apart. At the exam visit, exam students reported higher stress than the comparison students. Inside the exam group, stress level, the TH1/TH2 cytokine balance of stimulated blood cells, and hair parameters changed from the pre-study visit to the exam visit. Those within-group changes were absent in the comparison group. At the exam visit itself, cytokine balance and hair parameters did not differ between exam students and comparison students. The human finding to keep is a within-person shift in the exam group across the study window, plus the absence of a between-group difference at the peak stress visit. The mouse mechanism is tighter than the human pilot. This page reports both.

Reishi's record is antioxidant bloodwork

Chiu and colleagues gave 42 healthy adults a triterpenoid- and polysaccharide-enriched Ganoderma lucidum capsule, 225 milligrams a day, or placebo, for six months, then crossed over after one month. Total antioxidant capacity (TEAC) moved from 79.33 to 84.04. Thiols and glutathione moved from 6 to 8.05. TBARS fell from 3.37 to 2.47. 8-hydroxy-deoxyguanosine fell from 15.99 to 11.98. GOT and GPT fell by 42 percent and 27 percent. P was less than 0.05. Ultrasound readings shifted from mild fatty liver toward normal. These are antioxidant and liver-enzyme outcomes in healthy volunteers. They are not Gas6 levels, not substance P levels, and not hair counts.

Chu and colleagues add a boundary on sleep. An aqueous Ganoderma extract at 80 and 120 milligrams per kilogram did not change sleep architecture in normal rats. In pentobarbital-treated rats it shortened sleep latency and lengthened sleep, and flumazenil blocked part of that effect. Reishi in this dataset is not a demonstration that the mushroom removes corticosterone from a mouse adrenal.

Neighbours in one bottle

Folli-Activ includes reishi in a bottle that also includes saw palmetto, pumpkin seed oil, nettle root, EGCG, curcumin, biotin, royal jelly, aloe, and piperine. The stress experiments explain why a shopper asks about stress at all: corticosterone holds stem cells in rest, and substance P drives premature catagen in a defined mouse model. The reishi citation explains why the mushroom is on the label: a six-month human crossover moved antioxidant markers. The bottle is 90 capsules, brand MY NPM FOLLI-ACTIV. On this site, 1 bottle is RM169, 3 bottles are RM447, and 6 bottles are RM699 with free shipping. Checkout is by card. The studies remain the studies. The formula is the formula.

Sources