Weight gain at menopause and andropause: the decline of Kidney Yang

Many women observe with surprise and frustration that they have barely changed their habits, yet the kilos accumulate progressively at perimenopause. The abdomen rounds, the thighs swell, the metabolism appears to have gone into standby. In men, a similar phenomenon often sets in after 50. The simplistic answer - ‘it’s age’ - is both true and unhelpful. Understanding the mechanisms enables one to act intelligently.

Menopause and metabolism: what science explains

The fall in oestrogens: more than a gynaecological matter

Oestrogens are not solely reproductive hormones. They exert profound metabolic effects:

• Insulin sensitivity: oestrogens improve insulin sensitivity via ER-alpha receptor activation in the liver and muscles. Their fall at menopause reduces this sensitivity by 15 to 25%, promoting insulin resistance.
• Fat distribution: oestrogens direct fat storage towards subcutaneous tissue (hips, thighs). At menopause, without this signal, fat redistributes to visceral abdominal tissue - the metabolically most dangerous depot.
• Basal metabolic rate: oestrogens maintain muscle mass (via activation of muscle protein synthesis). Their fall accelerates sarcopenia, reducing the basal metabolic rate.
• Thermogenesis: oestrogens activate brown adipose tissue via ER-beta receptors. Their reduction diminishes thermogenic energy expenditure.

Male andropause: the testosterone decline

In men, testosterone declines progressively from 30-35 years of age (-1 to -2% per year), with an accelerated decline often noted after 50. Testosterone:

• Maintains muscle mass (anabolic effects)
• Stimulates lipolysis in visceral adipose tissue via androgen receptors
• Improves insulin sensitivity
• Supports muscle mitochondrial function

Testosterone deficiency favours visceral fat accumulation, insulin resistance and reduced basal metabolic rate.

Early menopause: acting before blockages set in

The first 3 to 5 years following the cessation of menstruation represent a window of opportunity: metabolic changes are recent and more easily reversible than after a decade of compensation. Intervening early with the right strategies can prevent the establishment of metabolic syndrome.

The TCM perspective: the decline of Jing and Kidney Yang

The Woman of 49 according to the Nei Jing

「

At seven times seven years (49 years), the Ren Mai is exhausted, the Chong Mai declines, the Prior Heaven is depleted, menstruation ceases, the body ages and can no longer bear children.

」

The Huang Di Nei Jing describes menopause not as a pathology but as a natural passage: the progressive depletion of the Kidney’s Essences (Jing ç²¾), of which the two extraordinary vessels Ren Mai and Chong Mai are the conduits. This decline is inevitable - but its pace and metabolic consequences are modifiable.

Jing and Kidney Yang

The Essence (Jing ç²¾) is the fundamental hereditary substance stored in the Kidney. It is consumed progressively throughout life and conditions longevity, vitality and resistance to disease. At menopause, the decline of Jing is often accompanied by a decline in Kidney Yang - the primordial flame that warms and activates all metabolic processes.

However, not all Yang Deficiency at menopause is identical. TCM distinguishes two principal patterns:

Pure Kidney Yang Deficiency (Shen Yang Xu): marked cold sensitivity, profound fatigue, lower back pain, clear urine, pale complexion, normal or reduced appetite. This profile corresponds to Blockage B.

Kidney Yin Deficiency with Empty Fire (Yin Xu Huo Wang): hot flushes, night sweats, insomnia, irritability, dryness (skin, mucous membranes, throat). This profile is not a Yang Deficiency - treating with warming foods would aggravate symptoms. It corresponds to a mixed Profile B+A with an Empty Heat component.

Aliment	Nature	Saveur	Méridiens	Actions	Précautions
Fall in oestrogens	Cold	Decline of Kidney Yin and Jing (Ren and Chong vessels)	Natural menopause - modulate but do not block
Fat redistribution to abdomen	Cold	Kidney Yang insufficient to activate central lipolysis	Yang-tonifying foods, resistance exercise
Post-menopause insulin resistance	Cold	Spleen Yang Deficiency - Spleen without oestrogen support	Low GI, 12:12 to 13:11 fast, cinnamon
Hot flushes	Warm	Yin Deficiency - Empty Fire rising (note: not excess Yang)	Yin-nourishing foods: jujubes, tremella, mulberries - NO warming spices
Accelerated sarcopenia	Cold	Kidney Jing decline - muscles no longer nourished	Protein 1.2-1.6 g/kg/day + light resistance training 2-3 times/week
Winter depression, apathy	Cold	Yang insufficient to counter winter Yin	Light therapy, vitamin D, outdoor exercise, saffron

Nutritional strategy for menopause and andropause

What distinguishes menopause from other Profile B patterns

In menopausal women, Yang Deficiency may coexist with Yin Deficiency. In this case, overly warming foods (lamb, strong pepper, alcohol) may aggravate hot flushes by activating Empty Fire. The ideal diet is ‘gentle and warm’ - not hot.

Phytoestrogens: a natural bridge between the two systems

Phytoestrogens (soy isoflavones, flax lignans) bind to oestrogen receptors with approximately 1/1000 to 1/10,000 of the activity of endogenous oestrogens. Their effect is modulatory: they occupy receptors, reducing hormonal fluctuations. In TCM, soy legumes (Da Dou 大豆) nourish Kidney and Spleen Yin - a coherent correspondence.

• Ground flaxseed: rich in lignans, anti-inflammatory, omega-3 ALA - 2 tablespoons per day in porridge or yoghurt
• Fermented soy (miso, tempeh, natto): bioavailable isoflavones, probiotics - preferable to unfermented soy
• Red clover (Trifolium pratense): formononetin and biochanin A - possible supplement as a 3-month course

Jing and Yang-tonifying foods for post-menopause

• Walnuts and black sesame seeds (Hei Zhi Ma 黑芝麻): deeply nourish Kidney Jing - rich in selenium, zinc and melatonin
• Red dates (Da Zao 大枣): tonify Qi and Blood, nourish the Heart - consume cooked (2 to 3 per day)
• Chinese yam (Shan Yao 山药): simultaneously tonifies Spleen and Kidney - moderate GI - classic recipe for menopause
• Mulberries (Sang Shen 桑椹): nourish Blood and Yin of Liver and Kidney - antioxidant, rich in anthocyanins

Resistance exercise: essential at menopause

Sarcopenia is the major metabolic challenge of menopause and andropause. Without muscle mass, the basal metabolic rate declines inexorably. Light resistance training 2 to 3 times a week is the best-documented strategy for maintaining muscle mass, improving insulin sensitivity and supporting bone density. In TCM, ‘movement generates Yang’ - each exercise session progressively tonifies Kidney Yang.

FAQ

Should one adopt a specific diet at menopause?

Not a diet per se, but an adaptation of one’s dietary profile. Menopausal women with Profile B (predominant Yang Deficiency) benefit from a warm, tonifying diet. Those with intense hot flushes (Yin Deficiency + Empty Fire) require more neutral to slightly cool foods. The metabolic diagnosis questionnaire remains the best starting point.

Can DHEA supplementation help?

DHEA is the precursor of sex hormones and declines with age. Supplementation of 25 to 50 mg/day may improve body composition, libido and energy in individuals with low serum DHEA-S. It must be prescribed and monitored medically, as it may convert to oestrogens or testosterone depending on individual hormonal context.

Is there a TCM equivalent to hormone replacement therapy?

TCM does not have a direct equivalent to HRT (hormone replacement therapy), the decision for which rests with a doctor. It offers complementary approaches: classical formulas such as Zhi Bai Di Huang Wan (for Yin Deficiency with Empty Fire), Jin Gui Shen Qi Wan (for predominant Yang Deficiency), adaptogenic plants and personalised nutrition. These approaches may be used alone or alongside HRT under medical supervision.

Back to the main guide: Metabolism and Weight Loss - Complete TCM & Science Guide